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perf record: Refine capture printout

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Print out the number of bytes captured, and the (estimated) number of
events the output file contains.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-06-03 19:27:19 +02:00
parent f2521b6e4c
commit 021e9f4765
1 changed files with 24 additions and 10 deletions
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34
Documentation/perf_counter/builtin-record.c
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@ -67,6 +67,8 @@ static unsigned int mmap_read_head(struct mmap_data *md)
static long events;
static struct timeval last_read, this_read;
static __u64 bytes_written;
static void mmap_read(struct mmap_data *md)
{
unsigned int head = mmap_read_head(md);
@ -114,28 +116,34 @@ static void mmap_read(struct mmap_data *md)
buf = &data[old & md->mask];
size = md->mask + 1 - (old & md->mask);
old += size;
while (size) {
int ret = write(output, buf, size);
if (ret < 0) {
perror("failed to write");
exit(-1);
}
if (ret < 0)
die("failed to write");
size -= ret;
buf += ret;
bytes_written += ret;
}
}
buf = &data[old & md->mask];
size = head - old;
old += size;
while (size) {
int ret = write(output, buf, size);
if (ret < 0) {
perror("failed to write");
exit(-1);
}
if (ret < 0)
die("failed to write");
size -= ret;
buf += ret;
bytes_written += ret;
}
md->prev = old;
@ -467,8 +475,14 @@ static int __cmd_record(int argc, const char **argv)
ret = poll(event_array, nr_poll, 100);
}
fprintf(stderr, "[ perf record: Captured and wrote %ld events. ]\n", events);
/*
* Approximate RIP event size: 24 bytes.
*/
fprintf(stderr,
"[ perf record: Captured and wrote %.3f MB %s (~%lld events) ]\n",
(double)bytes_written / 1024.0 / 1024.0,
output_name,
bytes_written / 24);
return 0;
}