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Add support for attributes in the -perfcounter argument 

Five attributes are supported, matching what the perf(1) tool
supports. The 'p' attribute (precise IP reporting) wasn't added
because we don't do assembly-level debugging with benchlib.

Change-Id: I726f735a5bcc0c97e62cde0fbe0843597068ad7c
Reviewed-by: Jason McDonald <macadder1@gmail.com>
bb10
Thiago Macieira 2012-04-09 18:35:49 -03:00 committed by The Qt Project
parent 3963ab9d73
commit 408fa1e2b9
1 changed files with 38 additions and 1 deletions
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39
src/testlib/qbenchmarkperfevents.cpp
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@ -53,6 +53,7 @@
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <sys/syscall.h>
#include <sys/ioctl.h>
@ -418,9 +419,11 @@ QTest::QBenchmarkMetric QBenchmarkPerfEventsMeasurer::metricForEvent(quint32 typ
void QBenchmarkPerfEventsMeasurer::setCounter(const char *name)
{
initPerf();
const char *colon = strchr(name, ':');
int n = colon ? colon - name : strlen(name);
const Events *ptr = eventlist;
for ( ; ptr->type != PERF_TYPE_MAX; ++ptr) {
int c = strcmp(name, eventlist_strings + ptr->offset);
int c = strncmp(name, eventlist_strings + ptr->offset, n);
if (c == 0)
break;
if (c < 0) {
@ -431,6 +434,32 @@ void QBenchmarkPerfEventsMeasurer::setCounter(const char *name)
attr.type = ptr->type;
attr.config = ptr->event_id;
// now parse the attributes
if (!colon)
return;
while (*++colon) {
switch (*colon) {
case 'u':
attr.exclude_user = true;
break;
case 'k':
attr.exclude_kernel = true;
break;
case 'h':
attr.exclude_hv = true;
break;
case 'G':
attr.exclude_guest = true;
break;
case 'H':
attr.exclude_host = true;
break;
default:
fprintf(stderr, "ERROR: Unknown attribute '%c'\n", *colon);
exit(1);
}
}
}
void QBenchmarkPerfEventsMeasurer::listCounters()
@ -448,6 +477,14 @@ void QBenchmarkPerfEventsMeasurer::listCounters()
ptr->type == PERF_TYPE_SOFTWARE ? "software" :
ptr->type == PERF_TYPE_HW_CACHE ? "cache" : "other");
}
printf("\nAttributes can be specified by adding a colon and the following:\n"
" u - exclude measuring in the userspace\n"
" k - exclude measuring in kernel mode\n"
" h - exclude measuring in the hypervisor\n"
" G - exclude measuring when running virtualized (guest VM)\n"
" H - exclude measuring when running non-virtualized (host system)\n"
"Attributes can be combined, for example: -perfcounter branch-mispredicts:kh\n");
}
QBenchmarkPerfEventsMeasurer::QBenchmarkPerfEventsMeasurer()