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authorDavid S. Miller <davem@davemloft.net>2019-03-27 17:37:58 -0700
committerDavid S. Miller <davem@davemloft.net>2019-03-27 17:37:58 -0700
commit356d71e00d278d865f8c7f68adebd6ce4698a7e2 (patch)
tree8cb2dabf7440b56c6dee76b4253210c6b603b98e /tools/perf/Documentation/tips.txt
parentdf453700e8d81b1bdafdf684365ee2b9431fb702 (diff)
parent1a9df9e29c2afecf6e3089442d429b377279ca3c (diff)
downloadlinux-356d71e00d278d865f8c7f68adebd6ce4698a7e2.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
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diff --git a/tools/perf/Documentation/tips.txt b/tools/perf/Documentation/tips.txt
index 849599f39c5e..869965d629ce 100644
--- a/tools/perf/Documentation/tips.txt
+++ b/tools/perf/Documentation/tips.txt
@@ -15,6 +15,7 @@ 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
+To show assembler sample contexts use perf record -b / perf script -F +brstackinsn --xed
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,
@@ -34,3 +35,9 @@ Show current config key-value pairs: perf config --list
Show user configuration overrides: perf config --user --list
To add Node.js USDT(User-Level Statically Defined Tracing): perf buildid-cache --add `which node`
To report cacheline events from previous recording: perf c2c report
+To browse sample contexts use perf report --sample 10 and select in context menu
+To separate samples by time use perf report --sort time,overhead,sym
+To set sample time separation other than 100ms with --sort time use --time-quantum
+Add -I to perf report to sample register values visible in perf report context.
+To show IPC for sampling periods use perf record -e '{cycles,instructions}:S' and then browse context
+To show context switches in perf report sample context add --switch-events to perf record.