forked from Minki/linux
09f1985404
Thanks to Andi Kleen for providing useful tips. Suggested-by: Andi Kleen <andi@firstfloor.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1452508510-28316-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
30 lines
1.8 KiB
Plaintext
30 lines
1.8 KiB
Plaintext
For a higher level overview, try: perf report --sort comm,dso
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Sample related events with: perf record -e '{cycles,instructions}:S'
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Compare performance results with: perf diff [<old file> <new file>]
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Boolean options have negative forms, e.g.: perf report --no-children
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Customize output of perf script with: perf script -F event,ip,sym
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Generate a script for your data: perf script -g <lang>
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Save output of perf stat using: perf stat record <target workload>
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Create an archive with symtabs to analyse on other machine: perf archive
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Search options using a keyword: perf report -h <keyword>
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Use parent filter to see specific call path: perf report -p <regex>
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List events using substring match: perf list <keyword>
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To see list of saved events and attributes: perf evlist -v
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Use --symfs <dir> if your symbol files are in non-standard locations
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To see callchains in a more compact form: perf report -g folded
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Show individual samples with: perf script
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Limit to show entries above 5% only: perf report --percent-limit 5
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Profiling branch (mis)predictions with: perf record -b / perf report
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Treat branches as callchains: perf report --branch-history
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To count events in every 1000 msec: perf stat -I 1000
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Print event counts in CSV format with: perf stat -x,
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If you have debuginfo enabled, try: perf report -s sym,srcline
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For memory address profiling, try: perf mem record / perf mem report
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For tracepoint events, try: perf report -s trace_fields
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To record callchains for each sample: perf record -g
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To record every process run by an user: perf record -u <user>
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Skip collecing build-id when recording: perf record -B
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To change sampling frequency to 100 Hz: perf record -F 100
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See assembly instructions with percentage: perf annotate <symbol>
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If you prefer Intel style assembly, try: perf annotate -M intel
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