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perf auxtrace: Add itrace 'q' option for quicker, less detailed decoding

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The 'q' option is for modes of decoding that are quicker because they
skip or omit decoding some aspects of trace data.

If supported, the 'q' option may be repeated to increase the effect.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200710151104.15137-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2020-07-10 18:11:02 +03:00 committed by Arnaldo Carvalho de Melo
parent d4575f5fce
commit 51971536ef
3 changed files with 9 additions and 0 deletions
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3
tools/perf/Documentation/itrace.txt
View File

@ -18,6 +18,7 @@
l synthesize last branch entries (use with i or x)
L synthesize last branch entries on existing event records
s skip initial number of events
q quicker (less detailed) decoding
The default is all events i.e. the same as --itrace=ibxwpe,
except for perf script where it is --itrace=ce
@ -58,3 +59,5 @@
debug messages will or will not be logged. Each flag must be preceded
by either '+' or '-'. The flags are:
a all perf events
If supported, the 'q' option may be repeated to increase the effect.

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

@ -1554,6 +1554,9 @@ int itrace_parse_synth_opts(const struct option *opt, const char *str,
case 'a':
synth_opts->remote_access = true;
break;
case 'q':
synth_opts->quick += 1;
break;
case ' ':
case ',':
break;

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

@ -100,6 +100,7 @@ enum itrace_period_type {
* @error_minus_flags: flags to affect what errors are reported
* @log_plus_flags: flags to affect what is logged
* @log_minus_flags: flags to affect what is logged
* @quick: quicker (less detailed) decoding
*/
struct itrace_synth_opts {
bool set;
@ -137,6 +138,7 @@ struct itrace_synth_opts {
unsigned int error_minus_flags;
unsigned int log_plus_flags;
unsigned int log_minus_flags;
unsigned int quick;
};
/**
@ -642,6 +644,7 @@ bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
" l[len]: synthesize last branch entries (use with i or x)\n" \
" L[len]: synthesize last branch entries on existing event records\n" \
" sNUMBER: skip initial number of events\n" \
" q: quicker (less detailed) decoding\n" \
" PERIOD[ns|us|ms|i|t]: specify period to sample stream\n" \
" concatenate multiple options. Default is ibxwpe or cewp\n"