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* Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2010-03-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Provide generic perf_sample_data initialization MAINTAINERS: Add Arnaldo as tools/perf/ co-maintainer perf trace: Don't use pager if scripting perf trace/scripting: Remove extraneous header read perf, ARM: Modify kuser rmb() call to compile for Thumb-2 x86/stacktrace: Don't dereference bad frame pointers perf archive: Don't try to collect files without a build-id perf_events, x86: Fixup fixed counter constraints perf, x86: Restrict the ANY flag perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLE perf, x86: add some IBS macros to perf_event.h perf, x86: make IBS macros available in perf_event.h hw-breakpoints: Remove stub unthrottle callback x86/hw-breakpoints: Remove the name field perf: Remove pointless breakpoint union perf lock: Drop the buffers multiplexing dependency perf lock: Fix and add misc documentally things percpu: Add __percpu sparse annotations to hw_breakpoint
| * Merge commit 'v2.6.34-rc1' into perf/urgentIngo Molnar2010-03-09
| |\ | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: tools/perf/util/probe-event.c Merge reason: Pick up -rc1 and resolve the conflict as well. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf trace: Don't use pager if scriptingTom Zanussi2010-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's useful for paging through raw traces, but just gets in the way when scripting. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org LKML-Reference: <1267599873-8193-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf trace/scripting: Remove extraneous header readTom Zanussi2010-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | perf_header__read() is already done in perf_session__open(), so remove it from the script gen case. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org LKML-Reference: <1267599873-8193-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf, ARM: Modify kuser rmb() call to compile for Thumb-2Will Deacon2010-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Thumb-2 instruction set does not provide an encoding for sub pc, r0, #95 as present in the rmb() definition used by perf. This results in compilation failure when using a compiler targetting an instruction set other than ARM. This patch redefines rmb() for ARM by casting the address of the kuser helper to a function pointer, therefore getting the compiler to take care of making the call. Patch taken against tip/master. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Jamie Iles <jamie.iles@picochip.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1267616878-2154-1-git-send-email-will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf archive: Don't try to collect files without a build-idArnaldo Carvalho de Melo2010-03-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To avoid these error: [root@doppio ~]# perf archive tar: .build-id/00/00000000000000000000000000000000000000: Cannot stat: No such file or directory tar: .build-id/00/00000000000000000000000000000000000000: Cannot stat: No such file or directory tar: .build-id/00/00000000000000000000000000000000000000: Cannot stat: No such file or directory tar: .build-id/00/00000000000000000000000000000000000000: Cannot stat: No such file or directory tar: Exiting with failure status due to previous errors [root@doppio ~]# More work is needed to support archiving symtabs for binaries without a build-id, perhaps creating a perf.data UUID + adding build-ids for the binaries copied into the cache and then have this perf.data session UUID be a directory with symlinks to the by now calculated build-id of the files inside it. Or just do an extra pass and insert the calculated build-ids in the perf.data header. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf lock: Drop the buffers multiplexing dependencyFrederic Weisbecker2010-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need to deal with time ordered events to build a correct state machine of lock events. This is why we multiplex the lock events buffers. But the ordering is done from the kernel, on the tracing fast path, leading to high contention between cpus. Without multiplexing, the events appears in a weak order. If we have four events, each split per cpu, perf record will read the events buffers in the following order: [ CPU0 ev0, CPU0 ev1, CPU0 ev3, CPU0 ev4, CPU1 ev0, CPU1 ev0....] To handle a post processing reordering, we could just read and sort the whole in memory, but it just doesn't scale with high amounts of events: lock events can fill huge amounts in few times. Basically we need to sort in memory and find a "grace period" point when we know that a given slice of previously sorted events can be committed for post-processing, so that we can unload the memory usage step by step and keep a scalable sorting list. There is no strong rules about how to define such "grace period". What does this patch is: We define a FLUSH_PERIOD value that defines a grace period in seconds. We want to have a slice of events covering 2 * FLUSH_PERIOD in our sorted list. If FLUSH_PERIOD is big enough, it ensures every events that occured in the first half of the timeslice have all been buffered and there are none remaining and there won't be further to put inside this first timeslice. Then once we reach the 2 * FLUSH_PERIOD timeslice, we flush the first half to be gentle with the memory (the second half can still get new events in the middle, so wait another period to flush it) FLUSH_PERIOD is defined to 5 seconds. Say the first event started on time t0. We can safely assume that at the time we are processing events of t0 + 10 seconds, ther won't be anymore events to read from perf.data that occured between t0 and t0 + 5 seconds. Hence we can safely flush the first half. To point out funky bugs, we have a guardian that checks a new event timestamp is not below the last event's timestamp flushed and that displays a warning in this case. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com>
| * | perf lock: Fix and add misc documentally thingsHitoshi Mitake2010-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've forgot to add 'perf lock' line to command-list.txt, so users of perf could not find perf lock when they type 'perf'. Fixing command-list.txt requires document (tools/perf/Documentation/perf-lock.txt). But perf lock is too much "under construction" to write a stable document, so this is something like pseudo document for now. And I wrote description of perf lock at help section of CONFIG_LOCK_STAT, this will navigate users of lock trace events. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> LKML-Reference: <1265267295-8388-1-git-send-email-mitake@dcl.info.waseda.ac.jp> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | Merge commit 'v2.6.33' into perf/coreFrederic Weisbecker2010-02-27
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: __percpu annotations need the corresponding sparse address space definition upstream. Conflicts: tools/perf/util/probe-event.c (trivial)
* | \ \ Merge branch 'for-next' into for-linusJiri Kosina2010-03-08
|\ \ \ \ | |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c
| * | | tree-wide: Assorted spelling fixesDaniel Mack2010-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Joe Perches <joe@perches.com> Cc: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | | fix typos "precidence" -> "precedence" in commentsUwe Kleine-König2010-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch was generated by git grep -E -i -l 'precidence' | xargs -r perl -p -i -e 's/precidence/precedence/' Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | | Merge branch 'perf-probes-for-linus-2' of ↵Linus Torvalds2010-03-05
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Issue at least one memory barrier in stop_machine_text_poke() perf probe: Correct probe syntax on command line help perf probe: Add lazy line matching support perf probe: Show more lines after last line perf probe: Check function address range strictly in line finder perf probe: Use libdw callback routines perf probe: Use elfutils-libdw for analyzing debuginfo perf probe: Rename probe finder functions perf probe: Fix bugs in line range finder perf probe: Update perf probe document perf probe: Do not show --line option without dwarf support kprobes: Add documents of jump optimization kprobes/x86: Support kprobes jump optimization on x86 x86: Add text_poke_smp for SMP cross modifying code kprobes/x86: Cleanup save/restore registers kprobes/x86: Boost probes when reentering kprobes: Jump optimization sysctl interface kprobes: Introduce kprobes jump optimization kprobes: Introduce generic insn_slot framework kprobes/x86: Cleanup RELATIVEJUMP_INSTRUCTION to RELATIVEJUMP_OPCODE
| * | | | perf probe: Correct probe syntax on command line helpMasami Hiramatsu2010-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move @SRC right after FUNC in syntax according to syntax change on command line help. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <20100304033843.3819.10087.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Add lazy line matching supportMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add lazy line matching support for specifying new probes. This also changes the syntax of perf probe a bit. Now perf probe accepts one of below probe event definitions. 1) Define event based on function name [EVENT=]FUNC[@SRC][:RLN|+OFF|%return|;PTN] [ARG ...] 2) Define event based on source file with line number [EVENT=]SRC:ALN [ARG ...] 3) Define event based on source file with lazy pattern [EVENT=]SRC;PTN [ARG ...] - New lazy matching pattern(PTN) follows ';' (semicolon). And it must be put the end of the definition. - So, @SRC is no longer the part which must be put at the end of the definition. Note that ';' (semicolon) can be interpreted as the end of a command by the shell. This means that you need to quote it. (anyway you will need to quote the lazy pattern itself too, because it may contains other sensitive characters, like '[',']' etc.). Lazy matching ------------- The lazy line matching is similar to glob matching except ignoring spaces in both of pattern and target. e.g. 'a=*' can matches 'a=b', 'a = b', 'a == b' and so on. This provides some sort of flexibility and robustness to probe point definitions against minor code changes. (for example, actual 10th line of schedule() can be changed easily by modifying schedule(), but the same line matching 'rq=cpu_rq*' may still exist.) Changes in v3: - Cast Dwarf_Addr to uintmax_t for printf-formats. Changes in v2: - Cast Dwarf_Addr to unsigned long long for printf-formats. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133611.6725.45078.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Show more lines after last lineMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Show 2 more lines after the last probe-able line. This will clearly show the last closed-brace of inline functions. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133604.6725.76820.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Check function address range strictly in line finderMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check (inlined) function address range strictly for improving output of probe-able lines of inline functions. Without this change, perf probe --line <function> sometimes showed other inline function bodies too, because it didn't filter out inlined functions. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133557.6725.20697.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Use libdw callback routinesMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use libdw callback functions aggressively, and remove local tree-search API. This change simplifies the code. Changes in v3: - Cast Dwarf_Addr to uintmax_t for printf-formats. Changes in v2: - Cast Dwarf_Addr to unsigned long long for printf-formats. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133549.6725.81499.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Use elfutils-libdw for analyzing debuginfoMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Newer gcc introduces newer & richer debuginfo, and only libdw in elfutils project can support it. So perf probe moves onto elfutils-libdw from libdwarf. Changes in v3: - Cast Dwarf_Addr/Dwarf_Word to uintmax_t for printf-formats. - Recover a sign-prefix which was removed in v2 by mistake. Changes in v2: - Fix a type-casting bug in Makefile. - Cast Dwarf_Addr/Dwarf_Word to unsigned long long for printf-formats. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133542.6725.34724.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Rename probe finder functionsMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename *_probepoint to *_probe_point, for nothing but a cosmetic reason. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133534.6725.52615.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Fix bugs in line range finderMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix find_line_range_by_line() to init line_list and remove misconseptional found marking which should be done when real lines are found (if there is no lines probe-able, find_line_range() should return 0). Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133527.6725.52418.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Update perf probe documentMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update perf-probe.txt to suit to current perf-probe command and add some examples. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133519.6725.58816.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf probe: Do not show --line option without dwarf supportMasami Hiramatsu2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not show --line option in help message when perf doesn't support dwarf. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20100225133512.6725.88423.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2010-02-28
|\ \ \ \ \ | | |_|/ / | |/| | / | |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (172 commits) perf_event, amd: Fix spinlock initialization perf_event: Fix preempt warning in perf_clock() perf tools: Flush maps on COMM events perf_events, x86: Split PMU definitions into separate files perf annotate: Handle samples not at objdump output addr boundaries perf_events, x86: Remove superflous MSR writes perf_events: Simplify code by removing cpu argument to hw_perf_group_sched_in() perf_events, x86: AMD event scheduling perf_events: Add new start/stop PMU callbacks perf_events: Report the MMAP pgoff value in bytes perf annotate: Defer allocating sym_priv->hist array perf symbols: Improve debugging information about symtab origins perf top: Use a macro instead of a constant variable perf symbols: Check the right return variable perf/scripts: Tag syscall_name helper as not yet available perf/scripts: Add perf-trace-python Documentation perf/scripts: Remove unnecessary PyTuple resizes perf/scripts: Add syscall tracing scripts perf/scripts: Add Python scripting engine perf/scripts: Remove check-perf-trace from listed scripts ... Fix trivial conflict in tools/perf/util/probe-event.c
| * | | perf tools: Flush maps on COMM eventsDavid S. Miller2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Even though we don't register the counters until the child is right about to exec(), we're still going to get at least a few events while the fork()'d child is still executing 'perf' and in particular we're going to get the MMAP events. We can't distinguish the ones in the newly executed process because the PID will be the same. One way to solve this would be to have a PERF_RECORD_EXEC event, and when this is seen 'perf' can flush it's map cache. We can't use PERF_RECORD_COMM since that's generated by other things, not just exec(). Actually, thinking about it some more, using PERF_RECORD_COMM might be a good enough approximation. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1267196914-16238-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | perf annotate: Handle samples not at objdump output addr boundariesArnaldo Carvalho de Melo2010-02-26
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Without this patch we get this for need_resched: [root@mica ~]# perf annotate need_resched ------------------------------------------------ Percent | Source code & Disassembly of vmlinux ------------------------------------------------ : : : Disassembly of section .text: : : ffffffff810095ed <need_resched>: : return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); : } : : static inline int need_resched(void) : { 0.00 : ffffffff810095ed: 55 push %rbp : return unlikely(test_thread_flag(TIF_NEED_RESCHED)); 0.00 : ffffffff810095ee: be 03 00 00 00 mov $0x3,%esi : : static inline struct thread_info *current_thread_info(void) : { : struct thread_info *ti; : ti = (void *)(percpu_read_stable(kernel_stack) + 0.00 : ffffffff810095f3: 65 48 8b 3c 25 48 b5 mov %gs:0xb548,%rdi 0.00 : ffffffff810095fa: 00 00 : return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); : } : : static inline int need_resched(void) : { 0.00 : ffffffff810095fc: 48 89 e5 mov %rsp,%rbp : return unlikely(test_thread_flag(TIF_NEED_RESCHED)); 0.00 : ffffffff810095ff: 48 81 ef d8 1f 00 00 sub $0x1fd8,%rdi 0.00 : ffffffff81009606: e8 9d ff ff ff callq ffffffff810095a8 <test_ti_thread_flag> : } 0.00 : ffffffff8100960b: c9 leaveq 0.00 : ffffffff8100960c: 85 c0 test %eax,%eax 0.00 : ffffffff8100960e: 0f 95 c0 setne %al 0.00 : ffffffff81009611: 0f b6 c0 movzbl %al,%eax : Disassembly of section .vsyscall_0: : Disassembly of section .vsyscall_fn: : Disassembly of section .vsyscall_1: : Disassembly of section .vsyscall_2: : Disassembly of section .init.text: : Disassembly of section .altinstr_replacement: : Disassembly of section .exit.text: [root@mica ~]# But from the 'perf report' result we know that there are hits for need_resched on a 4 way machine mostly doing nothing, so after adding code to show what is in each hist offset and collapsing IP hits for what happens between objdump lines we get, for the same perf.data file: [root@mica ~]# perf annotate -v need_resched ------------------------------------------------ Percent | Source code & Disassembly of vmlinux ------------------------------------------------ : : : Disassembly of section .text: : : ffffffff810095ed <need_resched>: : return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); : } : : static inline int need_resched(void) : { 0.00 : ffffffff810095ed: 55 push %rbp : return unlikely(test_thread_flag(TIF_NEED_RESCHED)); 52.78 : ffffffff810095ee: be 03 00 00 00 mov $0x3,%esi : : static inline struct thread_info *current_thread_info(void) : { : struct thread_info *ti; : ti = (void *)(percpu_read_stable(kernel_stack) + 0.00 : ffffffff810095f3: 65 48 8b 3c 25 48 b5 mov %gs:0xb548,%rdi 0.00 : ffffffff810095fa: 00 00 : return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p); : } : : static inline int need_resched(void) : { 0.00 : ffffffff810095fc: 48 89 e5 mov %rsp,%rbp : return unlikely(test_thread_flag(TIF_NEED_RESCHED)); 9.72 : ffffffff810095ff: 48 81 ef d8 1f 00 00 sub $0x1fd8,%rdi 0.00 : ffffffff81009606: e8 9d ff ff ff callq ffffffff810095a8 <test_ti_thread_flag> : } 0.00 : ffffffff8100960b: c9 leaveq 0.00 : ffffffff8100960c: 85 c0 test %eax,%eax 37.50 : ffffffff8100960e: 0f 95 c0 setne %al 0.00 : ffffffff81009611: 0f b6 c0 movzbl %al,%eax : Disassembly of section .vsyscall_0: : Disassembly of section .vsyscall_fn: : Disassembly of section .vsyscall_1: : Disassembly of section .vsyscall_2: : Disassembly of section .init.text: : Disassembly of section .altinstr_replacement: : Disassembly of section .exit.text: [root@mica ~]# And now 'perf annotate -v', verbose mode, will show the hits per precise IP, so that one can make sense of the attribution to each objdumop line: [root@mica ~]# perf annotate -v need_resched Looking at the vmlinux_path (5 entries long) Using /lib/modules/2.6.33-rc8-tip-00784-g3471df5-dirty/build/vmlinux for symbols annotate_sym: filename=/lib/modules/2.6.33-rc8-tip-00784-g3471df5-dirty/build/vmlinux, sym=need_resched, start=0xffffffff810095ed, end=0xffffffff81009614 ------------------------------------------------ Percent | Source code & Disassembly of vmlinux ------------------------------------------------ ffffffff810095f1: 152 ffffffff81009603: 28 ffffffff8100960f: 55 ffffffff81009610: 53 h->sum: 288 <SNIP same annotation> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1267194194-15670-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf annotate: Defer allocating sym_priv->hist arrayArnaldo Carvalho de Melo2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because symbol->end is not fixed up at symbol_filter time, only after all symbols for a DSO are loaded, and that, for asm symbols, may be bogus, causing segfaults when hits happen in these symbols. Reported-by: David Miller <davem@davemloft.net> Reported-by: Anton Blanchard <anton@samba.org> Acked-by: David Miller <davem@davemloft.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: <stable@kernel.org> # for .33.x. Does not apply cleanly, needs backport. LKML-Reference: <20100225155740.GB8553@ghostprotocols.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf symbols: Improve debugging information about symtab originsArnaldo Carvalho de Melo2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Be more clear about DSO long names and tell from which file kernel symbols were obtained, all in --verbose mode: [root@mica ~]# perf report -v > /dev/null Looking at the vmlinux_path (5 entries long) Using /lib/modules/2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux for symbols [root@mica ~]# mv /lib/modules/2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux /tmp/dd [root@mica ~]# perf report -v > /dev/null Looking at the vmlinux_path (5 entries long) Using /proc/kallsyms for symbols [root@mica ~]# Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1266866139-6361-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf top: Use a macro instead of a constant variableArnaldo Carvalho de Melo2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To overcome a silly gcc warning: cc1: warnings being treated as errors builtin-top.c: In function ‘lookup_sym_source’: builtin-top.c:291: warning: not protecting local variables: variable length buffer make: *** [builtin-top.o] Error 1 make: *** Waiting for unfinished jobs.... That is emitted for this: const size_t pattern_len = BITS_PER_LONG / 4 + 2; char pattern[pattern_len + 1]; Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1266866062-6287-1-git-send-email-acme@infradead.org> [ -v2: macroify the naming style ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf symbols: Check the right return variableZhang, Yanmin2010-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In function dso__split_kallsyms(), curr_map saves the return value of map__new2. So check it instead of var map after the call returns. Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: <stable@kernel.org> # for .33.x Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1267066851.1726.9.camel@localhost> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf/scripts: Tag syscall_name helper as not yet availableFrederic Weisbecker2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | syscall_name() helper, which resolves a syscall arch number to its name, is not yet available as we first need to implement event injection for it to work. Remove it from the documentation or tag its references as unavailable yet. Once it's implemented, we can just revert the current patch. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | perf/scripts: Add perf-trace-python DocumentationTom Zanussi2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also small update to perf-trace-perl and perf-trace docs. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-13-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Remove unnecessary PyTuple resizesTom Zanussi2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we know the size of a tuple in advance, there's no need to resize it - start out with the known size in the first place. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1266822779.6426.4.camel@tropicana> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Add syscall tracing scriptsTom Zanussi2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds a set of scripts that aggregate system call totals and system call errors. Most are Python scripts that also test basic functionality of the new Python engine, but there's also one Perl script added for comparison and for reference in some new Documentation contained in a later patch. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-8-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Add Python scripting engineTom Zanussi2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add base support for Python scripting to perf trace. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-6-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Remove check-perf-trace from listed scriptsTom Zanussi2010-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The check-perf-trace script only checks Perl functionality, and doesn't really need to be listed as as user script anyway. This only removes the '-report' shell script, so although it doesn't appear in the listing, the '-record' shell script and the check perf trace perl script itself is still available and can still be run manually as such: $ libexec/perf-core/scripts/perl/bin/check-perf-trace-record $ perf trace -s libexec/perf-core/scripts/perl/check-perf-trace.pl Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-6-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Move Perl scripting files to scripting-engines dirTom Zanussi2010-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a scripting-engines directory to contain scripting engine implementation code, in anticipation of the addition of new scripting support. Also removes trace-event-perl.h. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-5-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Move common code out of Perl-specific filesTom Zanussi2010-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This stuff is needed by all scripting engines; move it from the Perl engine source to a more common place. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-4-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Fix bug in Util.pmTom Zanussi2010-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix bogus calculation. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf/scripts: Fix supported language listing optionTom Zanussi2010-02-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'perf trace -s list' prints a list of the supported scripting languages. One problem with it is that it falls through and prints the trace as well. The use of 'list' for this also makes it easy to confuse with 'perf trace -l', used for listing available scripts. So change 'perf trace -s list' to 'perf trace -s lang' and fixes the fall-through problem. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * | perf tools: Don't use parent comm if not set at fork timeArnaldo Carvalho de Melo2010-02-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As the parent comm then is worthless, confusing users about the thread where the sample really happened, leading to think that the sample happened in the parent, not where it really happened, in the children of a thread for which a PERF_RECORD_COMM event was not received. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1266627727-19715-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf symbols: Fix up map end too on modular kernels with no modules installedArnaldo Carvalho de Melo2010-02-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 2161db9 we stopped failing when not finding modules when asked too, but then the kernel maps (just one, for vmlinux) wasn't having its ->end field correctly set up, so symbols were not being found for the vmlinux map because its range was 0-0. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1266702793-29434-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf record: Fix existing process callgraph symbolaustin_zhang@linux.intel.com2010-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When 'perf record -g' a existing process, even with debuginfo packages, still cannnot get symbol from 'perf report'. try: perf record -g -p `pidof xxx` -f perf report 68.26% :1181 b74870f2 [.] 0x000000b74870f2 | |--32.09%-- 0xb73b5b44 | 0xb7487102 | 0xb748a4e2 | 0xb748633d | 0xb73b41cd | 0xb73b4467 | 0xb747d531 The reason is: for existing process, in __cmd_record(), the pid is 0 rather than the existing process id. Signed-off-by: Austin Zhang <austin_zhang@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4710.10.255.24.35.1265389362.squirrel@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf top: Use address pattern in lookup_sym_sourceArnaldo Carvalho de Melo2010-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because we may have aliases, like __GI___strcoll_l in /lib64/libc-2.10.2.so that appears in objdump as: $ objdump --start-address=0x0000003715a86420 \ --stop-address=0x0000003715a872dc -dS /lib64/libc-2.10.2.so 0000003715a86420 <__strcoll_l>: 3715a86420: 55 push %rbp 3715a86421: 48 89 e5 mov %rsp,%rbp 3715a86424: 41 57 push %r15 [root@doppio linux-2.6-tip]# So look for the address exactly at the start of the line instead so that annotation can work for in these cases. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Kirill Smelkov <kirr@landau.phys.spbu.ru> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1265550376-12665-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf top: Fix annotate for userspaceKirill Smelkov2010-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First, for programs and prelinked libraries, annotate code was fooled by objdump output IPs (src->eip in the code) being wrongly converted to absolute IPs. In such case there were no conversion needed, but in src->eip = strtoull(src->line, NULL, 16); src->eip = map->unmap_ip(map, src->eip); // = eip + map->start - map->pgoff we were reading absolute address from objdump (e.g. 8048604) and then almost doubling it, because eip & map->start are approximately close for small programs. Needless to say, that later, in record_precise_ip() there was no matching with real runtime IPs. And second, like with `perf annotate` the problem with non-prelinked *.so was that we were doing rip -> objdump address conversion wrong. Also, because unlike `perf annotate`, `perf top` code does annotation based on absolute IPs for performance reasons(*), new helper for mapping objdump addresse to IP is introduced. (*) we get samples info in absolute IPs, and since we do lots of hit-testing on absolute IPs at runtime in record_precise_ip(), it's better to convert objdump addresses to IPs once and do no conversion at runtime. I also had to fix how objdump output is parsed (with hardcoded 8/16 characters format, which was inappropriate for ET_DYN dsos with small addresses like '4ac') Also note, that not all objdump output lines has associtated IPs, e.g. look at source lines here: 000004ac <my_strlen>: extern "C" int my_strlen(const char *s) 4ac: 55 push %ebp 4ad: 89 e5 mov %esp,%ebp 4af: 83 ec 10 sub $0x10,%esp { int len = 0; 4b2: c7 45 fc 00 00 00 00 movl $0x0,-0x4(%ebp) 4b9: eb 08 jmp 4c3 <my_strlen+0x17> while (*s) { ++len; 4bb: 83 45 fc 01 addl $0x1,-0x4(%ebp) ++s; 4bf: 83 45 08 01 addl $0x1,0x8(%ebp) So we mark them with eip=0, and ignore such lines in annotate lookup code. Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru> [ Note: one hunk of this patch was applied by Mike in 57d8188 ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1265550376-12665-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf tools: Fix session init on non-modular kernelsIngo Molnar2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | perf top and perf record refuses to initialize on non-modular kernels: refuse to initialize: $ perf top -v map_groups__set_modules_path_dir: cannot open /lib/modules/2.6.33-rc6-tip-00586-g398dde3-dirty/ Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1265223128-11786-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf tools: Clean up O_LARGEFILE et al usageXiao Guangrong2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Setting _FILE_OFFSET_BITS and using O_LARGEFILE, lseek64, etc, is redundant. Thanks H. Peter Anvin for pointing it out. So, this patch removes O_LARGEFILE, lseek64, etc. Suggested-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <4B6A8972.3070605@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf annotate: Fix perf top module symbol annotationMike Galbraith2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Kirill Smelkov <kirr@landau.phys.spbu.ru> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1265265106.6364.5.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf top: Teach it to autolocate vmlinuxKirill Smelkov2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By relying on logic in dso__load_kernel_sym(), we can automatically load vmlinux. The only thing which needs to be adjusted, is how --sym-annotate option is handled - now we can't rely on vmlinux been loaded until full successful pass of dso__load_vmlinux(), but that's not the case if we'll do sym_filter_entry setup in symbol_filter(). So move this step right after event__process_sample() where we know the whole dso__load_kernel_sym() pass is done. By the way, though conceptually similar `perf top` still can't annotate userspace - see next patches with fixes. Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1265223128-11786-9-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | perf annotate: Fix it for non-prelinked *.soKirill Smelkov2010-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The problem was we were incorrectly calculating objdump addresses for sym->start and sym->end, look: For simple ET_DYN type DSO (*.so) with one function, objdump -dS output is something like this: 000004ac <my_strlen>: int my_strlen(const char *s) 4ac: 55 push %ebp 4ad: 89 e5 mov %esp,%ebp 4af: 83 ec 10 sub $0x10,%esp { i.e. we have relative-to-dso-mapping IPs (=RIP) there. For ET_EXEC type and probably for prelinked libs as well (sorry can't test - I don't use prelink) objdump outputs absolute IPs, e.g. 08048604 <zz_strlen>: extern "C" int zz_strlen(const char *s) 8048604: 55 push %ebp 8048605: 89 e5 mov %esp,%ebp 8048607: 83 ec 10 sub $0x10,%esp { So, if sym->start is always relative to dso mapping(*), we'll have to unmap it for ET_EXEC like cases, and leave as is for ET_DYN cases. (*) and it is - we've explicitely made it relative. Look for adjust_symbols handling in dso__load_sym() Previously we were always unmapping sym->start and for ET_DYN dsos resulting addresses were wrong, and so objdump output was empty. The end result was that perf annotate output for symbols from non-prelinked *.so had always 0.00% percents only, which is wrong. To fix it, let's introduce a helper for converting rip to objdump address, and also let's document what map_ip() and unmap_ip() do -- I had to study sources for several hours to understand it. Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1265223128-11786-8-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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