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* perf: Fix callchain hit bad cast on ascii displayFrederic Weisbecker2011-01-03
| | | | | | | | | | | | | | | | | ipchain__fprintf_graph() casts the number of hits in a branch as an int, which means we lose its highests bits. This results in meaningless number of callchain hits in perf.data that have a high number of hits recorded, typically those that have callchain branches hits appearing more than INT_MAX. This happens easily as those are pondered by the event period. Reported-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
* perf probe: Fix to support libdwfl older than 0.148Masami Hiramatsu2010-12-21
| | | | | | | | | | | | | | | | | | | | | Since the libdwfl library before 0.148 fails to analyze live kernel debuginfo, 'perf probe --list' compiled with those old libdwfl sometimes crashes. To avoid that bug, perf probe does not use libdwfl's live kernel analysis routine when it is compiled with older libdwfl. Side effect: perf with older libdwfl doesn't support listing probe in modules with source code line. Those could be shown by symbol+offset. Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20101217131218.24123.62424.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Fix lazy wildcard matchingMasami Hiramatsu2010-12-21
| | | | | | | | | | | | | | | | Fix lazy wildcard matching to ignore space after wild card. Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20101217131200.24123.8202.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf buildid-list: Fix error return for successArnaldo Carvalho de Melo2010-12-16
| | | | | | | | | | | | | | | | It was always returning -1 (255), confusing test scripts. Reported-by: Han Pingtian <phan@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Han Pingtian <phan@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf buildid-cache: Fix symbolic link handlingFranck Bui-Huu2010-12-16
| | | | | | | | | | | | | This was broken since link(2) doesn't dereference symbolic links. Instead 'filename' becomes a symbolic link to the same file that 'name' refers to. This had the bad effect to create dangling symlinks in the case that even can't be removed with perf-buildid-cache(1). LKML-Reference: <m38vzxxrql.fsf@gmail.com> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Stop using vmlinux files with no symbolsFranck Bui-Huu2010-12-16
| | | | | | | | | | | | | | Fail if the kernel image contains no symbol, allowing using other images in the vmlinux search path that may have a usable symtab. Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Francis Moreau <francis.moro@gmail.com> Cc: Franck Bui-Huu <vagabon.xyz@gmail.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> LPU-Reference: <m3d3p9ydx9.fsf_-_@gmail.com> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf probe: Fix use of kernel image path given by 'k' optionFranck Bui-Huu2010-12-16
| | | | | | | | | | | | | | | | Users were not being able to have the explicitely specified vmlinux pathname used, instead a search on the vmlinux path was always being made. Reported-by: Francis Moreau <francis.moro@gmail.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Francis Moreau <francis.moro@gmail.com> Cc: Franck Bui-Huu <vagabon.xyz@gmail.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> LPU-Reference: <m3hbelydz8.fsf_-_@gmail.com> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf record: Fix eternal wait for stillborn childArnaldo Carvalho de Melo2010-12-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When execvp fails to find the specified command on the path we won't get SIGCHLD, so send a SIGUSR1 and exit right away. Current situation would require a SIGINT performed by the user and would produce meaningless summary. Now: [acme@emilia linux]$ ./foo -bash: ./foo: No such file or directory [acme@emilia linux]$ perf record ./foo ./foo: No such file or directory [acme@emilia linux]$ Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf header: Don't assume there's no attr info if no sample ids is providedFranck Bui-Huu2010-11-30
| | | | | | | | | | | | | | | | This primarily fixes perf-report, which didn't report the correct type of event if perf-record was called to record one event different from 'cycles': $ perf record -e instructions true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.007 MB perf.data (~295 samples) ] $ perf report | head -n1 # Events: 7 cycles LPU-Reference: <m3mxor6nex.fsf@gmail.com> Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
* perf symbols: Figure out start address of kernel map from kallsymsMing Lei2010-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | On ARM, module symbol start address is ahead of kernel symbol start address, so we can't suppose that the start address of kernel map always is zero, otherwise may cause incorrect .start and .end of kernel map (caused by fixup) when there are modules loaded, then map_groups__find may return incorrect map for symbol query. This patch always figures out the start address of kernel map from /proc/kallsyms if the file is available, so fix the issues on ARM for module loaded case. This patch fixes the following issues on ARM when modules are loaded: - vmlinux symbol can't be found by kallsyms maps doing 'perf test' - module symbols are parsed mistakenlly when doing 'perf top'/'perf report' Cc: Ian Munsie <imunsie@au1.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20101125192725.62d31b42@tom-lei> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Fix kallsyms kernel/module map splittingArnaldo Carvalho de Melo2010-11-30
| | | | | | | | | | | | | | | | | | | On ARM, module addresss space is ahead of kernel space, so the module symbols are handled before kernel symbol in dso__split_kallsyms, then was causing one map to be created for each kernel symbol. Reported-by: Ming Lei <tom.leiming@gmail.com> Tested-by: Ming Lei <tom.leiming@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Ming Lei <tom.leiming@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20101124144540.GB15875@ghostprotocols.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Remove incorrect open-coded container_of()Rabin Vincent2010-11-23
| | | | | | | | | | | | | | | | | | At least on ARM, padding is inserted between rb_node and sym in struct symbol_name_rb_node, causing "((void *)sym) - sizeof(struct rb_node)" to point inside rb_node rather than to the symbol_name_rb_node. Fix this by converting the code to use container_of(). Cc: Ian Munsie <imunsie@au1.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Ming Lei <tom.leiming@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20101123163106.GA25677@debian> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf record: Handle restrictive permissions in /proc/{kallsyms,modules}Arnaldo Carvalho de Melo2010-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 59365d1 commit, even being reverted by 33e0d57, showed a non robust behavior in 'perf record': it really should just warn the user that some functionality will not be available. The new behavior then becomes: [acme@felicio linux]$ ls -la /proc/{kallsyms,modules} -r-------- 1 root root 0 Nov 22 12:19 /proc/kallsyms -r-------- 1 root root 0 Nov 22 12:19 /proc/modules [acme@felicio linux]$ perf record ls -R > /dev/null Couldn't record kernel reference relocation symbol Symbol resolution may be skewed if relocation was used (e.g. kexec). Check /proc/kallsyms permission or run as root. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.004 MB perf.data (~161 samples) ] [acme@felicio linux]$ perf report --stdio [kernel.kallsyms] with build id 77b05e00e64e4de1c9347d83879779b540d69f00 not found, continuing without symbols # Events: 98 cycles # # Overhead Command Shared Object Symbol # ........ ....... ............... .................... # 48.26% ls [kernel] [k] ffffffff8102b92b 22.49% ls libc-2.12.90.so [.] __strlen_sse2 8.35% ls libc-2.12.90.so [.] __GI___strcoll_l 8.17% ls ls [.] 11580 3.35% ls libc-2.12.90.so [.] _IO_new_file_xsputn 3.33% ls libc-2.12.90.so [.] _int_malloc 1.88% ls libc-2.12.90.so [.] _int_free 0.84% ls libc-2.12.90.so [.] malloc_consolidate 0.84% ls libc-2.12.90.so [.] __readdir64 0.83% ls ls [.] strlen@plt 0.83% ls libc-2.12.90.so [.] __GI_fwrite_unlocked 0.83% ls libc-2.12.90.so [.] __memcpy_sse2 # # (For a higher level overview, try: perf report --sort comm,dso) # [acme@felicio linux]$ It still has the build-ids for DSOs in the maps with hits: [acme@felicio linux]$ perf buildid-list 77b05e00e64e4de1c9347d83879779b540d69f00 [kernel.kallsyms] 09c4a431a4a8b648fcfc2c2bdda70f56050ddff1 /bin/ls af75ea9ad951d25e0f038901a11b3846dccb29a4 /lib64/libc-2.12.90.so [acme@felicio linux]$ That can be used in another machine to resolve kernel symbols. Cc: Eugene Teo <eugeneteo@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Marcus Meissner <meissner@suse.de> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf trace: update usageTom Zanussi2010-11-10
| | | | | | | Update usage to reflect the different perf trace variants. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf trace: update Documentation with new perf trace variantsTom Zanussi2010-11-10
| | | | | | | | Add documentation describing new 'perf trace' command changes e.g. <command> handling and live-mode/top variants. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf trace: live-mode command-line cleanupTom Zanussi2010-11-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch attempts to make the perf trace command-line for live-mode commands more user-friendly and consistent with other perf commands. The main change it makes is to allow <commands> to be run as part of perf trace live-mode commands, as other perf commands do, instead of the system-wide traces they're currently hard-coded to by the shell scripts. With this patch, the following live-mode trace now works as expected: $ perf trace rw-by-pid ls -al The previous system-wide behavior for this command would still be available by explicitly specifying -a: $ perf trace rw-by-pid -a ls -al and if no <command> is specified, the output is also system-wide: $ perf trace rw-by-pid Because live-mode requires both record and report steps to be invoked, it isn't always possible to know which args to send to the report and which to send to the record steps - mainly this is the case for report scripts with optional args - in those cases it would be necessary to use separate 'perf trace record' and 'perf trace report' steps. For example: $ perf trace syscall-counts ls Here we can't decide whether ls should be passed as a param to the syscall-counts script or whether we should invoke ls as a <command>. In these cases, we just say that we'll ignore optional script params and always interpret the extra arguments as a <command>. If the user instead wants the other interpretation, that can be accomplished by using separate record and report commands explicitly: $ perf trace record syscall-counts $ perf trace report syscall-counts ls So the rules that this patch implements, which seem to make the most intuitive sense for live-mode commands: - for commands with optional args and commands with no args, no args are sent to the report script, all are sent to the record step - for 'top' commands i.e. that end with 'top', <commands> can't be used - all extra args are send to the report script as params - for commands with required args, the n required args are taken to be the first n args after the script name and sent to the report script, and the rest are sent to the record step Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf trace record: handle commands correctlyTom Zanussi2010-11-10
| | | | | | | | | | | | | | | | | | | | | | | | | Because the perf-trace shell scripts hard-coded the use of the perf-record system-wide param, a perf trace record session was always system wide, even if it was given a command. If given a command, perf trace record now only records the events for the command, as users expect. If no command is given, or if the '-a' option is used, the recorded events are system-wide, as before. root@tropicana:~# perf trace record syscall-counts ls -al root@tropicana:~# perf trace ls-23152 [000] 39984.890387: sys_enter: NR 12 (0, 0, 0, 0, 0, 0) ls-23152 [000] 39984.890404: sys_enter: NR 9 (0, 0, 0, 0, 0, 0) root@tropicana:~# perf trace record syscall-counts -a ls -al root@tropicana:~# perf trace npviewer.bin-22297 [000] 39831.102709: sys_enter: NR 168 (0, 0, 0, 0, 0, 0) ls-23111 [000] 39831.107679: sys_enter: NR 59 (0, 0, 0, 0, 0, 0) Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf record: make the record options available outside perf recordTom Zanussi2010-11-10
| | | | | | | | | | | Other perf commands that invoke perf record, such as perf trace, may want to reuse the options used by perf record. This makes them non-static and renames them to avoid clashes with other 'options' variables. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf trace scripting: remove system-wide param from shell scriptsTom Zanussi2010-11-10
| | | | | | | | | Including -a unconditionally when recording doesn't allow for the option of running scripts without it. Future patches will add add it back if needed at run-time. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf trace scripting: fix some small memory leaks and missing error checksTom Zanussi2010-11-10
| | | | | | | | | Free the other two fields of script_desc which somehow got overlooked, free malloc'ed args in case exec fails, and add missing checks for failed mallocs. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Acked-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* perf: Fix usages of profile_cpu in builtin-top.c to use cpu_listCorey Ashford2010-11-10
| | | | | | | | | | | | | | | | | | profile_cpu was left over from an earlier implementation that supported running perf top on a single CPU. profile_cpu was no longer set by any switch and usages of it resulted in dead code. Instead, convert the code to use cpu_list, which is set by the -C <cpu_list> option. Also improved the printing of nr_cpus and cpu_list by correcting the plurals. Signed-off-by: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: a.p.zijlstra@chello.nl Cc: acme@redhat.com LKML-Reference: <1289269245-9388-1-git-send-email-cjashfor@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf, ui: Eliminate stack-smashing protection compiler complaintCyrill Gorcunov2010-11-10
| | | | | | | | | | | | | | | | | | | | The gcc complains about small auto-var strings being allocated from stack space. Make them const to avoid this: | CC util/ui/util.o | cc1: warnings being treated as errors | util/ui/util.c: In function ‘ui__dialog_yesno’: | util/ui/util.c:108: error: not protecting function: no buffer at least 8 bytes long | make: *** [util/ui/util.o] Error 1 The real bug is in the newtWinChoice() ABI - but that's an externality we cannot fix here, so we use this workaround. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20101106084724.GA5956@lenovo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'perf/core' of ↵Ingo Molnar2010-10-27
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent
| * perf python scripting: Add futex-contention scriptArnaldo Carvalho de Melo2010-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The equivalent to this SystemTAP script: http://sourceware.org/systemtap/wiki/WSFutexContention [root@doppio ~]# perf trace futex-contention Press control+C to stop and show the summary ^Cnpviewer.bin[15242] lock 7f0a8be19104 contended 29 times, 72806 avg ns npviewer.bin[15242] lock 7f0a8be19130 contended 2 times, 1355 avg ns synergyc[17245] lock f127f4 contended 1 times, 1830569 avg ns firefox[15116] lock 7f2b7238af0c contended 168 times, 1230390 avg ns synergyc[17245] lock f2fc20 contended 1 times, 33149 avg ns npviewer.bin[15255] lock 7f0a8be19074 contended 155 times, 73047 avg ns npviewer.bin[15255] lock 7f0a8be190a0 contended 127 times, 7088 avg ns synergyc[17247] lock f12854 contended 1 times, 46741 avg ns synergyc[17245] lock f12610 contended 1 times, 7358 avg ns [root@doppio ~]# Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf python scripting: Fixup cut'n'paste error in sctop scriptArnaldo Carvalho de Melo2010-10-26
| | | | | | | | | | | | | | | | | | | | | | | | Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf scripting: Shut up 'perf record' final statusArnaldo Carvalho de Melo2010-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We want just the script output, not internal details about the record phase. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf record: Remove newline character from perror() argumentMatt Fleming2010-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we include a newline character in the string argument to perror() then the output will be split across two lines like so, Unable to read perf file descriptor : No space left on device Deleting the newline character prints a much more readable error, Unable to read perf file descriptor: No space left on device Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <89e77b54659bc3798b23a5596c2debb7f6f4cf27.1283010281.git.matt@console-pimps.org> Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@felicio.ghostprotocols.net>
* | Merge branch 'perf/core' of ↵Ingo Molnar2010-10-26
|\| | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent
| * perf python scripting: Support fedora 11 (audit 1.7.17)Arnaldo Carvalho de Melo2010-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Where we don't have the audit.MACH_ARMEB constant. Cc: David S. Miller <davem@davemloft.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf python scripting: Improve the syscalls-by-pid scriptArnaldo Carvalho de Melo2010-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | . Print message at script start telling how to get te summary . Print the syscall names . Accept both pid (if numeric) or COMM name Now it looks like this: [root@emilia tmp]# perf trace syscall-counts-by-pid Press control+C to stop and show the summary ^C syscall events by comm/pid: comm [pid]/syscalls count ---------------------------------------- ---------- automount [1670] futex 2 sshd [2322] rt_sigprocmask 4 select 2 write 1 read 1 perf [15178] read 2506 open 794 close 769 write 240 getdents 112 lseek 16 stat 9 perf_counter_open 5 fcntl 5 mmap 5 statfs 2 perf [15179] read 56701 open 499 stat 176 fstat 149 close 109 mmap 98 brk 75 rt_sigaction 66 munmap 42 mprotect 24 lstat 7 lseek 5 getdents 4 ioctl 3 readlink 2 futex 1 statfs 1 getegid 1 geteuid 1 getgid 1 getuid 1 getrlimit 1 fcntl 1 uname 1 write 1 [root@emilia tmp]# fg -bash: fg: current: no such job [root@emilia tmp]# perf trace syscall-counts-by-pid 2322 Press control+C to stop and show the summary ^C syscall events by comm/pid: comm [pid]/syscalls count ---------------------------------------- ---------- sshd [2322] rt_sigprocmask 4 select 2 write 1 read 1 [root@emilia tmp]# perf trace syscall-counts-by-pid sshd Press control+C to stop and show the summary ^C syscall events for sshd: comm [pid]/syscalls count ---------------------------------------- ---------- sshd [2322] rt_sigprocmask 4 select 2 write 1 read 1 [root@emilia tmp]# Cc: David S. Miller <davem@davemloft.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf python scripting: print the syscall name on sctopArnaldo Carvalho de Melo2010-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [root@emilia tmp]# perf trace sctop 1 syscall events: event count ---------------------------------------- ---------- read 215400 futex 4029 write 376 brk 33 rt_sigprocmask 24 select 17 lseek 2 fsync 1 ^C[root@emilia tmp]# Cc: David S. Miller <davem@davemloft.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf python scripting: Improve the syscalls-counts scriptArnaldo Carvalho de Melo2010-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | . Print message at script start telling how to get te summary . Print the syscall name Now it looks like this: [root@emilia ~]# perf trace syscall-counts Press control+C to stop and show the summary ^C syscall events: event count ---------------------------------------- ----------- read 102752 open 1293 close 878 write 319 stat 185 fstat 149 getdents 116 mmap 98 brk 80 rt_sigaction 66 munmap 42 mprotect 24 lseek 21 lstat 7 rt_sigprocmask 4 futex 3 statfs 3 ioctl 3 readlink 2 select 2 getegid 1 geteuid 1 getgid 1 getuid 1 getrlimit 1 fcntl 1 uname 1 [root@emilia ~]# Cc: David S. Miller <davem@davemloft.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf python scripting: Improve the failed-syscalls-by-pid scriptArnaldo Carvalho de Melo2010-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | . Print message at script start telling how to get te summary . Print the syscall name using the audit-lib-python package, if installed . Print the errno string . Accept both pid (if numeric) or COMM name Now it looks like this: [root@emilia ~]# perf trace failed-syscalls-by-pid Press control+C to stop and show the summary ^C syscall errors: comm [pid] count ------------------------------ ---------- automount [1670] syscall: futex err = ETIMEDOUT 39 irqbalance [1462] syscall: openat err = ENOENT 4 perf [7888] syscall: lseek err = ESPIPE 1 syscall: open err = ENOENT 24 perf [7889] syscall: ioctl err = EINVAL 1 syscall: readlink err = EINVAL 2 syscall: open err = ENOENT 389 syscall: stat err = ENOENT 141 syscall: lseek err = ESPIPE 3 [root@emilia ~]# [root@emilia ~]# perf trace failed-syscalls-by-pid 1670 Press control+C to stop and show the summary ^C syscall errors: comm [pid] count ------------------------------ ---------- automount [1670] syscall: futex err = ETIMEDOUT 2 [root@emilia ~]# [root@emilia ~]# [root@emilia ~]# [root@emilia ~]# perf trace failed-syscalls-by-pid automount Press control+C to stop and show the summary ^C syscall errors for automount: comm [pid] count ------------------------------ ---------- automount [1669] syscall: futex err = ETIMEDOUT 1 automount [1670] syscall: futex err = ETIMEDOUT 5 [root@emilia ~]# Cc: David S. Miller <davem@davemloft.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Fix format specified for Dwarf_Off parameterArnaldo Carvalho de Melo2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixing the following error on 32-bit arches: util/probe-finder.c: In function ‘line_range_search_cb’: util/probe-finder.c:1734: error: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘Dwarf_Off’ Reported-by: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf trace: Fix detection of script extensionBen Hutchings2010-10-23
| | | | | | | | | | | | | | | | | | | | | | The extension starts with the last dot in the name, not the first. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1286723462.2955.206.camel@localhost> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf trace: Use $PERF_EXEC_PATH in canned report scriptsBen Hutchings2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | Set $PERF_EXEC_PATH before starting the record and report scripts, and make them use it where necessary. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1286723403.2955.205.camel@localhost> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf tools: Document event modifiersSonny Rao2010-10-23
| | | | | | | | | | | | | | | | | | | | | | | | | | Existing documentation doesn't discuss event modifiers, so add a description of what's currently possible to the documentation of perf-list. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> LKML-Reference: <1287107460-12112-1-git-send-email-sonnyrao@linux.vnet.ibm.com> Signed-off-by: Sonny Rao <sonnyrao@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | Merge branch 'perf/core' of ↵Ingo Molnar2010-10-23
|\| | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent
| * perf tools: Remove direct slang.h includeArnaldo Carvalho de Melo2010-10-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We wrap it in libslang.h because we need to deal with older slang release where HAVE_LONG_LONG is referenced as: So we need to define it. Noticed when rebuilding the perf tools on a RHEL5 machine. 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: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Add basic module supportMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add basic module probe support on perf probe. This introduces "--module <MODNAME>" option to perf probe for putting probes and showing lines and variables in the given module. Currently, this supports only probing on running modules. Supporting off-line module probing is the next step. e.g.) [show lines] # ./perf probe --module drm -L drm_vblank_info <drm_vblank_info:0> 0 int drm_vblank_info(struct seq_file *m, void *data) 1 { struct drm_info_node *node = (struct drm_info_node *) m->private 3 struct drm_device *dev = node->minor->dev; ... [show vars] # ./perf probe --module drm -V drm_vblank_info:3 Available variables at drm_vblank_info:3 @<drm_vblank_info+20> (unknown_type) data struct drm_info_node* node struct seq_file* m [put a probe] # ./perf probe --module drm drm_vblank_info:3 node m Add new event: probe:drm_vblank_info (on drm_vblank_info:3 with node m) You can now use it on all perf tools, such as: perf record -e probe:drm_vblank_info -aR sleep 1 [list probes] # ./perf probe -l probe:drm_vblank_info (on drm_vblank_info:3@drivers/gpu/drm/drm_info.c with ... Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101021101341.3542.71638.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Show accessible global variablesMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add --externs for allowing --vars to show accessible global (externally defined) variables from a given probe point too. This will give you a hint which globals can be accessible from the probe point. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101021101335.3542.31003.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Function style fixMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | Just change the order of function arguments for ease of read; moving optional bool flag to the last. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101021101329.3542.51200.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Show accessible local variablesMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add -V (--vars) option for listing accessible local variables at given probe point. This will help finding which local variables are available for event arguments. e.g.) # perf probe -V call_timer_fn:23 Available variables at call_timer_fn:23 @<run_timer_softirq+345> function_type* fn int preempt_count long unsigned int data struct list_head work_list struct list_head* head struct timer_list* timer struct tvec_base* base Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101021101323.3542.40282.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Support global variablesMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | Allow users to set external defined global variables as event arguments (e.g. jiffies). Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20101021101316.3542.1999.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Fix local variable searching loopMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix to check the die's address and search into the die only if it has given address. This will avoid finding wrong variables in wrong basic block. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20101021101309.3542.46434.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * perf probe: Fix type searchingMasami Hiramatsu2010-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix to get the actual type die of variables by using dwarf_attr_integrate() which gets attribute from die even if the type die is connected by DW_AT_abstract_origin. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20101021101302.3542.38549.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2010-10-21
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (163 commits) tracing: Fix compile issue for trace_sched_wakeup.c [S390] hardirq: remove pointless header file includes [IA64] Move local_softirq_pending() definition perf, powerpc: Fix power_pmu_event_init to not use event->ctx ftrace: Remove recursion between recordmcount and scripts/mod/empty jump_label: Add COND_STMT(), reducer wrappery perf: Optimize sw events perf: Use jump_labels to optimize the scheduler hooks jump_label: Add atomic_t interface jump_label: Use more consistent naming perf, hw_breakpoint: Fix crash in hw_breakpoint creation perf: Find task before event alloc perf: Fix task refcount bugs perf: Fix group moving irq_work: Add generic hardirq context callbacks perf_events: Fix transaction recovery in group_sched_in() perf_events: Fix bogus AMD64 generic TLB events perf_events: Fix bogus context time tracking tracing: Remove parent recording in latency tracer graph options tracing: Use one prologue for the preempt irqs off tracer function tracers ...
| * Merge branch 'perf/urgent' into perf/coreIngo Molnar2010-10-05
| |\ | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: tools/perf/util/ui/browsers/hists.c Merge reason: fix the conflict and merge in changes for dependent patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ Merge branch 'tip/perf/core' of ↵Ingo Molnar2010-09-15
| |\ \ | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
| * | | perf ui browser: Don't use windows, slang is enoughArnaldo Carvalho de Melo2010-09-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They are useless and take away precious columns and lines, so stop using windows. One more step in removing newt code, that after all is not being useful at all for the coalescing TUI model in perf. Suggested-by: Christoph Hellwig <hch@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20100822082003.GB7365@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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