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a7672d1df5
linux/tools/perf
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Arnaldo Carvalho de Melo a7672d1df5 perf evlist: Change the COMM when preparing the workload 
It was reported that --exclude-perf wasn't working, as tracepoints were
appearing in 'perf script' output as having the 'perf' COMM, that is
just the window in evlist__prepare_workload() after the fork() and
before the execvp() call for workloads specified in the command line.

Example:

  # perf record -e kmem:kmalloc --filter 'bytes_alloc<650 && bytes_alloc>620' --exclude-perf -e kmem:kfree --exclude-perf -aR sleep 30

Then:

  # perf script
          perf 15905 [009] 1498.356094: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
          perf 15905 [009] 1498.356116: kmem:kfree: call_site=free_bprm+0x8f ptr=(nil)
          perf 15905 [009] 1498.356116: kmem:kfree: call_site=do_execveat_common+0x19d ptr=0xffff9cf750421c00
          perf 15905 [009] 1498.356138: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
          perf 15905 [009] 1498.356148: kmem:kfree: call_site=free_bprm+0x8f ptr=(nil)
          perf 15905 [009] 1498.356148: kmem:kfree: call_site=do_execveat_common+0x19d ptr=0xffff9cf750421c00
          perf 15905 [009] 1498.356168: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
          perf 15905 [009] 1498.356176: kmem:kfree: call_site=free_bprm+0x8f ptr=(nil)
  <SNIP>
          perf 15905 [009] 1498.356348: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
          perf 15905 [014] 1498.356386: kmem:kfree: call_site=security_compute_sid.part.0+0x3b2 ptr=(nil)
          perf 15905 [014] 1498.356423: kmem:kfree: call_site=load_elf_binary+0x207 ptr=0xffff9cf5b2a34220
          perf 15905 [014] 1498.356694: kmem:kfree: call_site=__free_slab+0xb5 ptr=0xffff9cf6d0b3b000
         sleep 15905 [014] 1498.356739: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)

Use prctl() to show that that is just the preparation of the workload:

  # perf script
     perf-exec 19036 [009] 2199.357582: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
     perf-exec 19036 [009] 2199.357604: kmem:kfree: call_site=free_bprm+0x8f ptr=(nil)
     perf-exec 19036 [009] 2199.357604: kmem:kfree: call_site=do_execveat_common+0x19d ptr=0xffff9cf786459800
     perf-exec 19036 [009] 2199.357630: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
  <SNIP>
     perf-exec 19036 [000] 2199.358277: kmem:kfree: call_site=__free_slab+0xb5 ptr=0xffff9cf786fb9c00
     perf-exec 19036 [000] 2199.358278: kmem:kfree: call_site=__free_slab+0xb5 ptr=0xffff9cf786458200
     perf-exec 19036 [000] 2199.358279: kmem:kfree: call_site=__free_slab+0xb5 ptr=0xffff9cf786458600
         sleep 19036 [000] 2199.358316: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
         sleep 19036 [000] 2199.358323: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=(nil)
         sleep 19036 [000] 2199.358330: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=0xffff9cf58be2d000
         sleep 19036 [000] 2199.358337: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=0xffff9cf58be2d000
         sleep 19036 [000] 2199.358339: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=0xffff9cf58be2d000
         sleep 19036 [000] 2199.358341: kmem:kfree: call_site=perf_event_mmap+0x279 ptr=0xffff9cf58be2d000

Reporter: zhanweiw <wingfancy@hotmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212213
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-03-15 10:13:22 -03:00
..
arch Merge remote-tracking branch 'torvalds/master' into perf/core 2021-03-08 10:11:33 -03:00
bench Merge remote-tracking branch 'torvalds/master' into perf/core 2021-03-08 10:11:33 -03:00
Documentation Merge remote-tracking branch 'torvalds/master' into perf/core 2021-03-08 10:11:33 -03:00
examples/bpf perf bpf examples: Fix bpf.h header include directive in 5sec.c example 2021-01-15 16:31:46 -03:00
include/bpf perf bpf: Remove bpf/ subdir from bpf.h headers used to build bpf events 2020-02-18 10:13:28 -03:00
jvmti perf jvmti: Remove redundant jitdump line table entries 2020-05-29 16:51:38 -03:00
pmu-events perf vendor events power9: Remove unsupported metrics 2021-03-02 09:43:31 -03:00
python tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
scripts perf script: Add min, max to futex-contention output, in addition to avg 2020-09-23 12:58:53 -03:00
tests perf tools: use ARRAY_SIZE 2021-03-09 09:08:41 -03:00
trace tools arch x86: Sync the msr-index.h copy with the kernel sources 2020-12-24 09:24:19 -03:00
ui perf annotate: Show full source location with 'l' hotkey 2021-03-06 16:42:31 -03:00
util perf evlist: Change the COMM when preparing the workload 2021-03-15 10:13:22 -03:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Build perf daemon: Add daemon command 2021-02-09 15:42:57 -03:00
builtin-annotate.c perf evlist: Use the right prefix for 'struct evlist' event group methods 2020-11-30 15:00:12 -03:00
builtin-bench.c perf bench: Add build-id injection benchmark 2020-10-13 10:59:42 -03:00
builtin-buildid-cache.c perf buildid-cache: Add --debuginfod option to specify a server to fetch debug files 2020-12-28 12:20:39 -03:00
builtin-buildid-list.c perf buildid-list: Add support for mmap2's buildid events 2020-12-28 12:23:09 -03:00
builtin-c2c.c perf c2c: Support data block and addr block 2021-02-08 16:25:00 -03:00
builtin-config.c
builtin-daemon.c perf daemon: Fix compile error with Asan 2021-03-06 16:54:31 -03:00
builtin-data.c perf data: Add support to store time of day in CTF data conversion 2020-08-06 09:43:37 -03:00
builtin-diff.c perf diff: Don't crash on freeing errno-session on the error path 2021-03-06 16:54:25 -03:00
builtin-evlist.c perf evlist: Support pipe mode display 2020-12-17 14:36:17 -03:00
builtin-ftrace.c perf evlist: Use the right prefix for 'struct evlist' create maps methods 2020-11-30 14:56:52 -03:00
builtin-help.c
builtin-inject.c perf inject jit: Add namespaces support 2021-02-03 13:10:44 -03:00
builtin-kallsyms.c
builtin-kmem.c perf evlist: Use the right prefix for 'struct evlist' 'find' methods 2020-11-30 09:48:07 -03:00
builtin-kvm.c perf evlist: Use the right prefix for 'struct evlist' mmap pages parsing method 2020-11-30 15:15:30 -03:00
builtin-list.c perf list: Remove dead code in argument check 2020-09-09 11:12:10 -03:00
builtin-lock.c perf lock: Don't free "lock_seq_stat" if read_count isn't zero 2020-11-12 17:55:41 -03:00
builtin-mem.c perf tools: Support data block and addr block 2021-02-08 16:25:00 -03:00
builtin-probe.c perf probe: Do not show the skipped events 2020-05-28 10:03:24 -03:00
builtin-record.c perf auxtrace: Automatically group aux-output events 2021-02-18 16:11:19 -03:00
builtin-report.c perf report: Create option to disable raw event ordering 2021-03-03 12:59:27 -03:00
builtin-sched.c perf evlist: Use the right prefix for 'struct evlist' 'find' methods 2020-11-30 09:48:07 -03:00
builtin-script.c perf script: Fixup 'struct evsel_script' method prefix 2021-03-09 08:59:21 -03:00
builtin-stat.c perf stat: Support L2 Topdown events 2021-02-08 16:25:00 -03:00
builtin-timechart.c perf tools: Replace zero-length array with flexible-array 2020-05-28 10:03:27 -03:00
builtin-top.c perf evlist: Use the right prefix for 'struct evlist' mmap pages parsing method 2020-11-30 15:15:30 -03:00
builtin-trace.c perf trace: Fix race in signal handling 2021-03-06 16:54:32 -03:00
builtin-version.c perf version: Add a feature for libpfm4 2020-11-04 09:42:40 -03:00
builtin.h perf daemon: Add daemon command 2021-02-09 15:42:57 -03:00
check-headers.sh perf tools: Generate mips syscalls_n64.c syscall table 2021-03-01 14:49:28 -03:00
command-list.txt perf daemon: Add daemon command 2021-02-09 15:42:57 -03:00
CREDITS
design.txt perf tools: Support CAP_PERFMON capability 2020-04-16 12:19:08 -03:00
Makefile tools: Let O= makes handle a relative path with -C option 2020-03-06 17:08:28 -03:00
Makefile.config perf tools: Generate mips syscalls_n64.c syscall table 2021-03-01 14:49:28 -03:00
Makefile.perf Merge remote-tracking branch 'torvalds/master' into perf/core 2021-03-08 10:11:33 -03:00
MANIFEST libperf: Move to tools/lib/perf 2020-01-06 11:46:09 -03:00
perf-archive.sh perf archive: Fix filtering of empty build-ids 2021-03-06 16:54:31 -03:00
perf-completion.sh
perf-read-vdso.c
perf-sys.h perf tests: Call test_attr__open() directly 2020-09-10 11:55:37 -03:00
perf-with-kcore.sh
perf.c perf daemon: Add daemon command 2021-02-09 15:42:57 -03:00
perf.h