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perf auxtrace: Add itrace A option to approximate IPC

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Add an option to specify that synthesized IPC can be approximate, rather
than completely accurate.

Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20211027080334.365596-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-10-27 11:03:30 +03:00 committed by Arnaldo Carvalho de Melo
parent cf14013b6c
commit b6778fe1bb
3 changed files with 7 additions and 0 deletions
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1
tools/perf/Documentation/itrace.txt
View file

@ -20,6 +20,7 @@
L synthesize last branch entries on existing event records
s skip initial number of events
q quicker (less detailed) decoding
A approximate IPC
Z prefer to ignore timestamps (so-called "timeless" decoding)
The default is all events i.e. the same as --itrace=ibxwpe,

3
tools/perf/util/auxtrace.c
View file

@ -1564,6 +1564,9 @@ int itrace_do_parse_synth_opts(struct itrace_synth_opts *synth_opts,
case 'q':
synth_opts->quick += 1;
break;
case 'A':
synth_opts->approx_ipc = true;
break;
case 'Z':
synth_opts->timeless_decoding = true;
break;

3
tools/perf/util/auxtrace.h
View file

@ -84,6 +84,7 @@ enum itrace_period_type {
* @thread_stack: feed branches to the thread_stack
* @last_branch: add branch context to 'instruction' events
* @add_last_branch: add branch context to existing event records
* @approx_ipc: approximate IPC
* @flc: whether to synthesize first level cache events
* @llc: whether to synthesize last level cache events
* @tlb: whether to synthesize TLB events
@ -127,6 +128,7 @@ struct itrace_synth_opts {
bool thread_stack;
bool last_branch;
bool add_last_branch;
bool approx_ipc;
bool flc;
bool llc;
bool tlb;
@ -649,6 +651,7 @@ bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
" L[len]: synthesize last branch entries on existing event records\n" \
" sNUMBER: skip initial number of events\n" \
" q: quicker (less detailed) decoding\n" \
" A: approximate IPC\n" \
" Z: prefer to ignore timestamps (so-called \"timeless\" decoding)\n" \
" PERIOD[ns|us|ms|i|t]: specify period to sample stream\n" \
" concatenate multiple options. Default is ibxwpe or cewp\n"