forked from Minki/linux
9332ef9dbd
Fix typos and add the following to the scripts/spelling.txt: an user||a user an userspace||a userspace I also added "userspace" to the list since it is a common word in Linux. I found some instances for "an userfaultfd", but I did not add it to the list. I felt it is endless to find words that start with "user" such as "userland" etc., so must draw a line somewhere. Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
35 lines
2.0 KiB
Plaintext
35 lines
2.0 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 a 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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For hierarchical output, try: perf report --hierarchy
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Order by the overhead of source file name and line number: perf report -s srcline
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System-wide collection from all CPUs: perf record -a
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Show current config key-value pairs: perf config --list
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Show user configuration overrides: perf config --user --list
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