Commit 51971536 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
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perf auxtrace: Add itrace 'q' option for quicker, less detailed decoding 



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: default avatarAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: default avatarAndi 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d4575f5f

tools/perf/Documentation/itrace.txt

+3 −0
Original line number Diff line number Diff line
@@ -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.

tools/perf/util/auxtrace.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

tools/perf/util/auxtrace.h

+3 −0
Original line number Diff line number Diff line
@@ -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"