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perf_counter tools: Add a data file header

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Add a data file header so we can transfer data between record and report.

LKML-Reference: <new-submission>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2009-06-18 23:22:55 +02:00
committed by Ingo Molnar
parent 2a0a50fe9d
commit f5970550d5
3 changed files with 73 additions and 43 deletions
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16
tools/perf/builtin-report.c
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@@ -1366,11 +1366,13 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
return 0;
}
static struct perf_file_header file_header;
static int __cmd_report(void)
{
int ret, rc = EXIT_FAILURE;
unsigned long offset = 0;
unsigned long head = 0;
unsigned long head = sizeof(file_header);
struct stat stat;
event_t *event;
uint32_t size;
@@ -1398,6 +1400,14 @@ static int __cmd_report(void)
exit(0);
}
read(input, &file_header, sizeof(file_header));
if (sort__has_parent &&
!(file_header.sample_type & PERF_SAMPLE_CALLCHAIN)) {
fprintf(stderr, "selected --sort parent, but no callchain data\n");
exit(-1);
}
if (load_kernel() < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
@@ -1469,9 +1479,13 @@ more:
head += size;
if (offset + head >= sizeof(file_header) + file_header.data_size)
goto done;
if (offset + head < stat.st_size)
goto more;
done:
rc = EXIT_SUCCESS;
close(input);