lkml.org 
[lkml]   [2012]   [Oct]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 28/31] tools, perf: Add a precise event qualifier
Date
From: Andi Kleen <ak@linux.intel.com>

Add a precise qualifier, like cpu/event=0x3c,precise=1/

This is needed so that the kernel can request enabling PEBS
for TSX events. The parser bails out on any sysfs parse errors,
so this is needed in any case to handle any event on the TSX
perf kernel.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/util/parse-events.c | 6 ++++++
tools/perf/util/parse-events.h | 1 +
tools/perf/util/parse-events.l | 1 +
3 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 401b088..de1cb9e 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -526,6 +526,12 @@ do { \
case PARSE_EVENTS__TERM_TYPE_NAME:
CHECK_TYPE_VAL(STR);
break;
+ case PARSE_EVENTS__TERM_TYPE_PRECISE:
+ CHECK_TYPE_VAL(NUM);
+ if ((unsigned)term->val.num > 2)
+ return -EINVAL;
+ attr->precise_ip = term->val.num;
+ break;
default:
return -EINVAL;
}
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index c356e44..8f92192 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -49,6 +49,7 @@ enum {
PARSE_EVENTS__TERM_TYPE_NAME,
PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD,
PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,
+ PARSE_EVENTS__TERM_TYPE_PRECISE,
};

struct parse_events__term {
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index ef602f0..c2e5142 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -168,6 +168,7 @@ period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
, { return ','; }
"/" { BEGIN(INITIAL); return '/'; }
+precise { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_PRECISE); }
}

mem: { BEGIN(mem); return PE_PREFIX_MEM; }
--
1.7.7.6


\
 
 \ /
  Last update: 2012-10-03 02:41    [W:0.117 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site