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perf docs: Update the documentation for the save_type filter 

Update the documentation to reflect the kernel changes.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220816125612.2042397-2-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2022-08-16 05:56:12 -07:00 committed by Arnaldo Carvalho de Melo
parent d72e5cf3cf
commit 3126204ce3
1 changed files with 3 additions and 0 deletions
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3
tools/perf/Documentation/perf-record.txt
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@ -397,6 +397,9 @@ following filters are defined:
- abort_tx: only when the target is a hardware transaction abort
- cond: conditional branches
- save_type: save branch type during sampling in case binary is not available later
For the platforms with Intel Arch LBR support (12th-Gen+ client or
4th-Gen Xeon+ server), the save branch type is unconditionally enabled
when the taken branch stack sampling is enabled.
+
The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.