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* perf tools: Make sparc64 arch point to sparcDavid Ahern2015-02-25
| | | | | | | | | | | | | | | The recent build changes cause perf to not compile for sparc64 since the arch/sparc64/Build file does not exist: /home/dahern/kernels/linux.git/tools/build/Makefile.build:40: arch/sparc64/Build: No such file or directory Fix by converting the sparc64 RAW_ARCH to sparc ARCH -- similar to what is done for x86_64. Signed-off-by: David Ahern <david.ahern@oracle.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1424306222-96843-1-git-send-email-david.ahern@oracle.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Define EM_AARCH64 for older OSesDavid Ahern2015-02-25
| | | | | | | | | | 4886f2ca19f6f added an arm-64 check, but the EM_AARCH64 macro is not defined in older releases (e.g., RHEL6). Define if it is not defined. Signed-off-by: David Ahern <david.ahern@oracle.com> Cc: Victor Kamensky <victor.kamensky@linaro.org> Link: http://lkml.kernel.org/r/1424306017-96797-1-git-send-email-david.ahern@oracle.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf top: Fix SIGBUS on sparc64David Ahern2015-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | perf-top is terminating due to SIGBUS on sparc64. git bisect points to: commit 82396986032915c1572bfb74b224fcc2e4e8ba7c Author: Arnaldo Carvalho de Melo <acme@redhat.com> Date: Mon Sep 8 13:26:35 2014 -0300 perf evlist: Refcount mmaps We need to know how many fds are using a perf mmap via PERF_EVENT_IOC_SET_OUTPUT, so that we can know when to ditch an mmap, refcount it. This commit added 'int refcnt' to struct perf_mmap and the addition makes the event_copy element no longer 8-byte aligned. Fix by adding __attribute__((aligned(8))) to the event_copy struct member. Signed-off-by: David Ahern <david.ahern@oracle.com> Link: http://lkml.kernel.org/r/1424304198-92028-1-git-send-email-david.ahern@oracle.com [ Switched from 'int pad;' to using __attribute__, David tested/acked that ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Fix probing for PERF_FLAG_FD_CLOEXEC flagAdrian Hunter2015-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f6edb53c4993ffe92ce521fb449d1c146cea6ec2 converted the probe to a CPU wide event first (pid == -1). For kernels that do not support the PERF_FLAG_FD_CLOEXEC flag the probe fails with EINVAL. Since this errno is not handled pid is not reset to 0 and the subsequent use of pid = -1 as an argument brings in an additional failure path if perf_event_paranoid > 0: $ perf record -- sleep 1 perf_event_open(..., 0) failed unexpectedly with error 13 (Permission denied) [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.007 MB /tmp/perf.data (11 samples) ] Also, ensure the fd of the confirmation check is closed and comment why pid = -1 is used. Needs to go to 3.18 stable tree as well. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Based-on-patch-by: David Ahern <david.ahern@oracle.com> Acked-by: David Ahern <david.ahern@oracle.com> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/54EC610C.8000403@intel.com Cc: stable@vger.kernel.org # v3.18+ Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Fix pthread_attr_setaffinity_np build errorAdrian Hunter2015-02-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Feature detection for pthread_attr_setaffinity_np was failing, producing this error: In file included from bench/futex-hash.c:17:0: bench/futex.h:73:19: error: conflicting types for ‘pthread_attr_setaffinity_np’ static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr, ^ In file included from bench/futex.h:72:0, from bench/futex-hash.c:17: /usr/include/pthread.h:407:12: note: previous declaration of ‘pthread_attr_setaffinity_np’ was here extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, ^ make[3]: *** [bench/futex-hash.o] Error 1 make[2]: *** [bench] Error 2 make[2]: *** Waiting for unfinished jobs.... This was because compiling test-pthread-attr-setaffinity-np.c failed due to the function arguments: test-pthread-attr-setaffinity-np.c: In function ‘main’: test-pthread-attr-setaffinity-np.c:11:2: warning: null argument where non-null required (argument 3) [-Wnonnull] ret = pthread_attr_setaffinity_np(&thread_attr, 0, NULL); ^ So fix the arguments. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Stephane Eranian <eranian@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1424774766-24194-1-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Define _GNU_SOURCE on pthread_attr_setaffinity_np feature checkJosh Boyer2015-02-25
| | | | | | | | | | | | | | | | | The man page for pthread_attr_set_affinity_np states that _GNU_SOURCE must be defined before pthread.h is included in order to get the proper function declaration. Define this in the Makefile. Without this defined, the feature check fails on a Fedora system with gcc5 and then the perf build later fails with conflicting prototypes for the function. Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com> Link: http://lkml.kernel.org/r/20150211162404.GA15522@hansolo.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bench: Fix order of arguments to memcpy_alloc_memBruce Merry2015-02-22
| | | | | | | | | | | | | This was causing the destination instead of the source to be filled. As a result, the source was typically all mapped to one zero page, and hence very cacheable. Signed-off-by: Bruce Merry <bmerry@ska.ac.za> Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20150115092022.GA11292@kryton Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Convert lseek + read to preadNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | When dso_cache__read() is called, it reads data from the given offset using lseek + normal read syscall. It can be combined to a single pread syscall. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-40-git-send-email-namhyung@kernel.org [ Fixed it up when cherry picking it from the multi threaded patchkit ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Use perf_data_file__fd() consistentlyNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | Do not reference file->fd directly since we want hide the implementation details from outside for possible future changes. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-8-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Support to read compressed module from build-id cacheNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | | The commit c00c48fc6e6e ("perf symbols: Preparation for compressed kernel module support") added support for compressed kernel modules but it only supports system path DSOs. When a dso is read from build-id cache, its filename doesn't end with ".gz" but has build-id. In this case, we should fallback to the original dso->name. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf evsel: Set attr.task bit for a tracking eventNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | | | | | | | The perf_event_attr.task bit is to track task (fork and exit) events but it missed to be set by perf_evsel__config(). While it was not a problem in practice since setting other bits (comm/mmap) ended up being in same result, it'd be good to set it explicitly anyway. The attr->task is to track task related events (fork/exit) only but other meta events like comm and mmap[2] also needs the task events. So setting attr->comm and/or attr->mmap causes the kernel emits the task events anyway. So the attr->task is only meaningful when other bits are off but I'd like to set it for completeness. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-6-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf header: Set header version correctlyNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | When check_magic_endian() is called, it checks the magic number in the perf data file to determine version and endianness. But if it uses a same endian the verison number wasn't updated and makes confusion. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf record: Show precise number of samplesNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After perf record finishes, it prints file size and number of samples in the file but this info is wrong since it assumes typical sample size of 24 bytes and divides file size by the value. However as we post-process recorded samples for build-id, it can show correct number like below. If build-id post-processing is not requested just omit the wrong number of samples. $ perf record noploop 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.159 MB perf.data (3989 samples) ] $ perf report --stdio -n # To display the perf.data header info, please use --header/--header-only options. # # Samples: 3K of event 'cycles' # Event count (approx.): 3771330663 # # Overhead Samples Command Shared Object Symbol # ........ ............ ....... ................ .......................... # 99.90% 3982 noploop noploop [.] main 0.09% 1 noploop ld-2.17.so [.] _dl_check_map_versions 0.01% 1 noploop [kernel.vmlinux] [k] setup_arg_pages 0.00% 5 noploop [kernel.vmlinux] [k] intel_pmu_enable_all Reported-by: Milian Wolff <mail@milianw.de> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Do not use __perf_session__process_events() directlyNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | | | It's only used for perf record to process build-id because its file size it's not fixed at this time due to remaining header features. However data offset and size is available so that we can use the perf_session__process_events() once we set the file size as the current offset like for now. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf callchain: Cache eh/debug frame offset for dwarf unwindNamhyung Kim2015-01-29
| | | | | | | | | | | | | | | | | | | When libunwind tries to resolve callchains it needs to know the offset of .eh_frame_hdr or .debug_frame to access the dso. Since it will always return the same result for a given DSO, just cache the result as an optimization. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-41-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Provide stub for missing pthread_attr_setaffinity_npVineet Gupta2015-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | uClibc Linuxthreads.old doesn't support the pthread_attr_setaffinity_np() functioo: ----------------->8----------------------- CC bench/futex-hash.o CC bench/futex-wake.o bench/futex-hash.c: In function 'bench_futex_hash': bench/futex-hash.c:161:3: error: implicit declaration of function 'pthread_attr_setaffinity_np' [-Werror=implicit-function-declaration] ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cpu_set_t), &cpu); ^ bench/futex-hash.c:161:3: error: nested extern declaration of 'pthread_attr_setaffinity_np' [-Werror=nested-externs] ----------------->8----------------------- So introduce a test to check that and if not available provide a stub. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1421156604-30603-6-git-send-email-vgupta@synopsys.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf evsel: Don't rely on malloc working for sz 0Vineet Gupta2015-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When running perf on ARC (uClibc based userspace), ran into this issue ------------->8---------------- [ARCLinux]$ ./perf record ls bin etc perf sys debug init perf.data tmp [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.001 MB perf.data (~24 samples) ] [ARCLinux]$ ./perf report incompatible file format (rerun with -v to learn more) ------------->8---------------- The problem happens in the following call stack when zalloc is called with size zero glibc default / uClibc with MALLOC_GLIBC_COMPAT are OK, but not if that config option is not enabled. cmd_report perf_session__new perf_session__open perf_session__read_header read_attr(fd, header, &f_attr) nr_ids = f_attr.ids.size / sizeof(u64); <-- 0 perf_evsel__alloc_id(vsel, 1, nr_ids) zalloc(ncpus * nthreads * sizeof(u64)) <-- 0 header.c: read_attr() (gdb) p *f_attr $17 = { attr = { type = 0, size = 96, config = 0, { sample_period = 4000, sample_freq = 4000 }, ... ids = { offset = 104, size = 0 <------ } } Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Suggested-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1421156604-30603-5-git-send-email-vgupta@synopsys.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* Merge branch 'perf/hw_breakpoints' into perf/coreIngo Molnar2015-01-28
|\ | | | | | | | | | | | | | | | | | | The new hw_breakpoint bits are now ready for v3.20, merge them into the main branch, to avoid conflicts. Conflicts: tools/perf/Documentation/perf-record.txt Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * perf tools: add hardware breakpoint bp_len test casesJacob Shin2014-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Jacob Shin <jacob.w.shin@gmail.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: xiakaixu <xiakaixu@huawei.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
| * perf tools: allow user to specify hardware breakpoint bp_lenJacob Shin2014-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently bp_len is given a default value of 4. Allow user to override it: $ perf stat -e mem:0x1000/8 ^ bp_len If no value is given, it will default to 4 as it did before. Signed-off-by: Jacob Shin <jacob.w.shin@gmail.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: xiakaixu <xiakaixu@huawei.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* | perf ui/tui: Show fatal error message only if existsNamhyung Kim2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When perf exits with some error it shows the error message with ui__error() or ui__warning() and then calls ui__exit() during exit_browser(). On TUI, it then shows a window titled "Fatal Error" to inform user a last message which might be related with this condition. However it sometimes contains no message and just annoyes users. The usual case for this is running perf top as normal user. (And /proc/sys/kernel/perf_event_paranoid being 1). Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1421736050-5283-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tests: Fix typo in sample-parsing.cRasmus Villemoes2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It was testing the same buffer for differences: memcmp(s1->user_stack.data, s1->user_stack.data, s1->user_stack.size) I'm pretty sure this wasn't supposed to be dead code. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1421946083-29863-1-git-send-email-linux@rasmusvillemoes.dk Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | tools lib fs debugfs: Introduce debugfs__strerror_open_tpArnaldo Carvalho de Melo2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There will be other cases where not just a tracepoint event is being opened below the debugfs mountpoint, but it is rather common, so provide one helper for that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-q6e6zct49ql6nbcw8kkg0lbj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf trace: Fix error reporting for evsel pgfault constructorArnaldo Carvalho de Melo2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In that case the only failure possible is not to have enough memory, as we are just creating the evsels, not trying to access any system facility such as debugfs files or syscalls. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-7k6asvfhiwiu2zs6o2oknchk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | tools lib fs: Pass filename to debugfs__strerror_openArnaldo Carvalho de Melo2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It was hardcoded for one specific tracepoint, leftover from its initial user: 'perf trace'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-j1jicvwljy5qx1nah4mkmyke@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | tools lib fs: Adopt debugfs open strerrno methodArnaldo Carvalho de Melo2015-01-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As this is not specific to an evlist and may be used with other tools. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-a9up9mivx1pzdf5tqrqsx62d@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> tools/perf/util/include/asm/hash.h
* | perf diff: Fix -o/--order option behaviorNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The prior change fixes default output ordering with each column but it breaks -o/--order option. This patch prepends a new hpp fmt struct to sort list but not to output field list so that it can affect ordering without adding a new output column. The new hpp fmt uses its own compare functions which treats dummy entries (which have no baseline) little differently - the delta field can be computed without baseline but others (ratio and wdiff) are not. The new output will look like below: $ perf diff -o 2 perf.data.{old,cur,new} ... # Baseline/0 Delta/1 Delta/2 Shared Object Symbol # .......... ....... ....... ................. .......................................... 22.98% +0.51% +0.52% libc-2.20.so [.] _int_malloc 5.70% +0.28% +0.30% libc-2.20.so [.] free 4.38% -0.21% +0.25% a.out [.] main 1.32% -0.15% +0.05% a.out [.] free@plt +0.01% [kernel.kallsyms] [k] intel_pstate_timer_func +0.01% [kernel.kallsyms] [k] _raw_spin_lock_irqsave +0.01% [kernel.kallsyms] [k] timekeeping_update.constprop.8 +0.01% +0.01% [kernel.kallsyms] [k] apic_timer_interrupt 0.01% -0.00% [kernel.kallsyms] [k] native_read_msr_safe 0.01% -0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 1.31% +0.03% -0.06% a.out [.] malloc@plt 31.50% -0.74% -0.23% libc-2.20.so [.] _int_free 32.75% +0.28% -0.83% libc-2.20.so [.] malloc 0.01% [kernel.kallsyms] [k] scheduler_tick +0.01% [kernel.kallsyms] [k] read_tsc +0.01% [kernel.kallsyms] [k] perf_adjust_freq_unthr_context.part.82 In above example, the output was sorted by 'Delta/2' column first, and then 'Baseline/0' and finally 'Delta/1'. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420677949-6719-8-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf diff: Fix output ordering to honor next columnNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When perf diff prints output, it sorts the entries using baseline field by default, but entries which don't have baseline are not sorted properly. This patch makes it sorted by values of next column. Before: # Baseline/0 Delta/1 Delta/2 Shared Object Symbol # .......... ....... ....... ................. .......................................... # 32.75% +0.28% -0.83% libc-2.20.so [.] malloc 31.50% -0.74% -0.23% libc-2.20.so [.] _int_free 22.98% +0.51% +0.52% libc-2.20.so [.] _int_malloc 5.70% +0.28% +0.30% libc-2.20.so [.] free 4.38% -0.21% +0.25% a.out [.] main 1.32% -0.15% +0.05% a.out [.] free@plt 1.31% +0.03% -0.06% a.out [.] malloc@plt 0.01% -0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% -0.00% [kernel.kallsyms] [k] native_read_msr_safe +0.01% [kernel.kallsyms] [k] _raw_spin_lock_irqsave +0.01% +0.01% [kernel.kallsyms] [k] apic_timer_interrupt +0.01% [kernel.kallsyms] [k] intel_pstate_timer_func +0.01% [kernel.kallsyms] [k] perf_adjust_freq_unthr_context.part.82 +0.01% [kernel.kallsyms] [k] read_tsc +0.01% [kernel.kallsyms] [k] timekeeping_update.constprop.8 After: # Baseline/0 Delta/1 Delta/2 Shared Object Symbol # .......... ....... ....... ................. .......................................... # 32.75% +0.28% -0.83% libc-2.20.so [.] malloc 31.50% -0.74% -0.23% libc-2.20.so [.] _int_free 22.98% +0.51% +0.52% libc-2.20.so [.] _int_malloc 5.70% +0.28% +0.30% libc-2.20.so [.] free 4.38% -0.21% +0.25% a.out [.] main 1.32% -0.15% +0.05% a.out [.] free@plt 1.31% +0.03% -0.06% a.out [.] malloc@plt 0.01% -0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% -0.00% [kernel.kallsyms] [k] native_read_msr_safe +0.01% +0.01% [kernel.kallsyms] [k] apic_timer_interrupt +0.01% [kernel.kallsyms] [k] read_tsc +0.01% [kernel.kallsyms] [k] perf_adjust_freq_unthr_context.part.82 +0.01% [kernel.kallsyms] [k] intel_pstate_timer_func +0.01% [kernel.kallsyms] [k] _raw_spin_lock_irqsave +0.01% [kernel.kallsyms] [k] timekeeping_update.constprop.8 Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420677949-6719-7-git-send-email-namhyung@kernel.org [ Fixed up hist_entry__cmp_ method signatures, fallout from making previous cset buildable ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Pass struct perf_hpp_fmt to its callbacksNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently ->cmp, ->collapse and ->sort callbacks doesn't pass corresponding fmt. But it'll be needed by upcoming changes in perf diff command. Suggested-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420677949-6719-6-git-send-email-namhyung@kernel.org [ fix build by passing perf_hpp_fmt pointer to hist_entry__cmp_ methods ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf diff: Introduce fmt_to_data_file() helperNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The fmt_to_data_file() is to retrieve struct data__file from perf_hpp_fmt which is embedded in diff_hpp_fmt. It'll be used by sort callback functions later. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420677949-6719-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf diff: Print diff result more preciselyNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current perf diff result is somewhat confusing since it sometimes hide small result and sometimes there's no result. So do not hide small result (less than 0.01%) and print "N/A" if baseline is not recorded (for ratio and wdiff only). Blank means the baseline is available but its pairs are not. Before: # Baseline Delta Shared Object Symbol # ........ ....... ................. ......................... # ... 0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% [kernel.kallsyms] [k] native_read_msr_safe 0.00% [kernel.kallsyms] [k] __rcu_read_unlock [kernel.kallsyms] [k] _raw_spin_lock +0.01% [kernel.kallsyms] [k] apic_timer_interrupt [kernel.kallsyms] [k] read_tsc After: # Baseline Delta Shared Object Symbol # ........ ....... ................. ......................... # ... 0.01% -0.01% [kernel.kallsyms] [k] native_write_msr_safe 0.01% [kernel.kallsyms] [k] scheduler_tick 0.01% [kernel.kallsyms] [k] native_read_msr_safe 0.00% [kernel.kallsyms] [k] __rcu_read_unlock +0.01% [kernel.kallsyms] [k] _raw_spin_lock +0.01% [kernel.kallsyms] [k] apic_timer_interrupt +0.01% [kernel.kallsyms] [k] read_tsc Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1419656793-32756-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf diff: Get rid of hists__compute_resort()Namhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hists__compute_resort() is to sort output fields based on the given field/criteria. This was done without the sort list but as we added the field to the sort list, we can do it with normal hists__output_resort() using the ->sort callback. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1419656793-32756-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Allow use of an exclusive option more than onceNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The exclusive options are to prohibit use of conflicting options at the same time. But it had a side effect that it also limits a such option can be used at most once. Currently the only user of the flag is perf probe and it allows to use such options more than once, but when one tries to use it, perf will fail like below: $ sudo perf probe -x /lib/libc-2.20.so --add malloc --add free Error: option `add' cannot be used with add ... Signed-off-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420886028-15135-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Document parameterized and symbolic eventsCody P Schafer2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Cody P Schafer <dev@codyps.com> Cc: Haren Myneni <hbabu@us.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-5-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Extend format_alias() to include event parametersCody P Schafer2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This causes `perf list pmu` to show parameters for parameterized events like: pmu/event_name,param1=?,param2=?/ [Kernel PMU event] An example: hv_24x7/HPM_TLBIE__PHYS_CORE,core=?/ [Kernel PMU event] Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Cody P Schafer <dev@codyps.com> Cc: Haren Myneni <hbabu@us.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-3-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Support parsing parameterized eventsCody P Schafer2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable event specification like: pmu/event_name,param1=0x1,param2=0x4/ Assuming that /sys/bus/event_source/devices/pmu/events/event_name Contains something like param2=?,bar=1,param1=? Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Cody P Schafer <dev@codyps.com> Cc: Haren Myneni <hbabu@us.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-2-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Remove some unused functions from color.cRickard Strandqvist2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removes some functions that are not used anywhere: color_parse_mem() color_parse() This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ramkumar Ramachandra <artagnon@gmail.com> Link: http://lkml.kernel.org/r/1419079865-354-1-git-send-email-rickard_strandqvist@spectrumdigital.se [ Remove now unused parse_{attr,color} routines too ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf report: Get rid of report__inc_stat()Namhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The report__inc_stat() function collects the number of hist entries in the session in order to calculate the max size of the progess bar. It'd be better if it does it during the addition of hist entries so that it can be used by other places too. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1419223455-4362-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf hists: Introduce function for deleting/removing hist_entryArnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code being used when decaying and deleting entries from a hists instance was the same, provide a function to avoid code dup. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-j6ideab7lkakavfvfguw858z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf hists: Rename hist_entry__free to __deleteArnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No logic changes, just to be consistent. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-f7n5y0mvk6gew5185h6fg316@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Remove EOL whitespacesArnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Janitorial stuff: boredom moment. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-u70i7shys3kths4hzru72bha@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf mem: Move the mem_operations global to struct perf_memArnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Just like the other parameters, grouping it on the builtin-mem specific config area: struct perf_mem. Acked-by: Stephane Eranian <eranian@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Fowles <rfowles@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ad8ns5l51ongemfsir3zy09x@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf mem: Enable sampling loads and stores simultaneouslyStephane Eranian2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch modifies perf mem to default to sampling loads and stores simultaneously. It could only do one or the other before yet there was no hardware restriction preventing simultaneous collection. With this patch, one run is sufficient to collect both. It is still possible to sample only loads or stores by using the -t option: $ perf mem -t load rec $ perf mem -t load rep Or $ perf mem -t store rec $ perf mem -t store rep The perf report TUI will show one event at a time. The store output will contain a Weight column which will be empty. In V2, we updated the man pages to reflect the change and also simplify the initialization of the argv vector passed to the cmd_*() functions as per LKML feedback. In V3, we fixed typos in the changelog. Signed-off-by: Stephane Eranian <eranian@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Fowles <rfowles@redhat.com> Link: http://lkml.kernel.org/r/20141217152355.GA10053@thinkpad Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Fix probing kretprobesNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit dfef99cd0b2c ("perf probe: Use ref_reloc_sym based address instead of the symbol name") converts kprobes to use ref_reloc_sym (i.e. _stext) and offset instead of using symbol's name directly. So on my system, adding do_fork ends up with like below: $ sudo perf probe -v --add do_fork%return probe-definition(0): do_fork%return symbol:do_fork file:(null) line:0 offset:0 return:1 lazy:(null) 0 arguments Looking at the vmlinux_path (7 entries long) Using /lib/modules/3.17.6-1-ARCH/build/vmlinux for symbols Could not open debuginfo. Try to use symbols. Opening /sys/kernel/debug/tracing/kprobe_events write=1 Added new event: Writing event: r:probe/do_fork _stext+456136 Failed to write event: Invalid argument Error: Failed to add events. Reason: Operation not permitted (Code: -1) As you can see, the do_fork was translated to _stext+456136. This was because to support (local) symbols that have same name. But the problem is that kretprobe requires to be inserted at function start point so it simply checks whether it's called with offset 0. And if not, it'll return with -EINVAL. You can see it with dmesg. $ dmesg | tail -1 [125621.764103] Return probe must be used without offset. So we need to use the symbol name instead of ref_reloc_sym in case of return probes. Reported-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1421234288-22758-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf symbols: Introduce 'for' method to iterate over the symbols with a ↵Arnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | given name Removing boilerplate from two places, where one would have to find the first entry, then iterate using symbol__next_by_name + strcmp to see if the next member had the same name. Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/n/tip-eh73z8gthv20yowirmx2yk38@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Do not rely on map__load() filter to find symbolsNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The find_probe_trace_events_from_map() searches matching symbol from a map (so from a backing dso). For uprobes, it'll create a new map (and dso) and loads it using a filter. It's a little bit inefficient in that it'll read out the symbol table everytime but works well anyway. For kprobes however, it'll reuse existing kernel map which might be loaded before. In this case map__load() just returns with no result. It makes kprobes always failed to find symbol even if it exists in the map (dso). To fix it, use map__find_symbol_by_name() instead. It'll load a map with full symbols and sorts them by name. It needs to search sibing nodes since there can be multiple (local) symbols with same name. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/1421234288-22758-3-git-send-email-namhyung@kernel.org [ Use symbol__next_by_name ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf symbols: Introduce method to iterate symbols ordered by nameArnaldo Carvalho de Melo2015-01-21
| | | | | | | | | | | | | | | | | | | | Given a symbol, go to the next entry in a rbtree sorted by symbol name. Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/n/tip-aq210drxprnu2so4dye5xa3j@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf symbols: Return the first entry with a given name in find_by_name methodNamhyung Kim2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a dso contains multiple symbols which have same name, current dso__find_symbol_by_name() only finds an one of them and there's no way to get the all symbols without going through the rbtree. So make symbols__find_by_name() return the first entry with the given name and the next patch in this series will provide a way to iterate from there, by the name ordered rb_tree, till a suitable symbol is found. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/1421234288-22758-2-git-send-email-namhyung@kernel.org [ Yanked this independent hunk, without changes, from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf annotate: Fix memory leaks in LOCK handlingRabin Vincent2015-01-21
| | | | | | | | | | | | | | | | | | | | The lock prefix handling fails to free the strdup()'d name as well as the fields allocated by the instruction parsing. Signed-off-by: Rabin Vincent <rabin@rab.in> Cc: Paul Mackerras <paulus@samba.org> Link: http://lkml.kernel.org/r/1421607621-15005-2-git-send-email-rabin@rab.in Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf annotate: Handle ins parsing failuresRabin Vincent2015-01-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't use the ins's ->sncprintf() if the parsing failed. For example, this fixes the display of "imul %edx". Without this patch: | imul (null),(null) After this patch: | imul %edx Signed-off-by: Rabin Vincent <rabin@rab.in> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1421607621-15005-1-git-send-email-rabin@rab.in Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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