threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
35 lines
2.0 KiB
Plaintext
35 lines
2.0 KiB
Plaintext
For a higher level overview, try: perf report --sort comm,dso
|
|
Sample related events with: perf record -e '{cycles,instructions}:S'
|
|
Compare performance results with: perf diff [<old file> <new file>]
|
|
Boolean options have negative forms, e.g.: perf report --no-children
|
|
Customize output of perf script with: perf script -F event,ip,sym
|
|
Generate a script for your data: perf script -g <lang>
|
|
Save output of perf stat using: perf stat record <target workload>
|
|
Create an archive with symtabs to analyse on other machine: perf archive
|
|
Search options using a keyword: perf report -h <keyword>
|
|
Use parent filter to see specific call path: perf report -p <regex>
|
|
List events using substring match: perf list <keyword>
|
|
To see list of saved events and attributes: perf evlist -v
|
|
Use --symfs <dir> if your symbol files are in non-standard locations
|
|
To see callchains in a more compact form: perf report -g folded
|
|
Show individual samples with: perf script
|
|
Limit to show entries above 5% only: perf report --percent-limit 5
|
|
Profiling branch (mis)predictions with: perf record -b / perf report
|
|
Treat branches as callchains: perf report --branch-history
|
|
To count events in every 1000 msec: perf stat -I 1000
|
|
Print event counts in CSV format with: perf stat -x,
|
|
If you have debuginfo enabled, try: perf report -s sym,srcline
|
|
For memory address profiling, try: perf mem record / perf mem report
|
|
For tracepoint events, try: perf report -s trace_fields
|
|
To record callchains for each sample: perf record -g
|
|
To record every process run by a user: perf record -u <user>
|
|
Skip collecting build-id when recording: perf record -B
|
|
To change sampling frequency to 100 Hz: perf record -F 100
|
|
See assembly instructions with percentage: perf annotate <symbol>
|
|
If you prefer Intel style assembly, try: perf annotate -M intel
|
|
For hierarchical output, try: perf report --hierarchy
|
|
Order by the overhead of source file name and line number: perf report -s srcline
|
|
System-wide collection from all CPUs: perf record -a
|
|
Show current config key-value pairs: perf config --list
|
|
Show user configuration overrides: perf config --user --list
|