lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

perf buildid: add perfconfig option to specify buildid cache dir

Browse Source 
This patch adds the ability to specify an alternate directory to store the
buildid cache (buildids, copy of binaries). By default, it is hardcoded to
$HOME/.debug. This directory contains immutable data. The layout of the
directory is such that no conflicts in filenames are possible. A modification
in a file, yields a different buildid and thus a different location in the
subdir hierarchy.

You may want to put the buildid cache elsewhere because of disk space
limitation or simply to share the cache between users. It is also useful for
remote collect vs. local analysis of profiles.

This patch adds a new config option to the perfconfig file.  Under the tag
'buildid', there is a dir option. For instance, if you have:

$ cat /etc/perfconfig
[buildid]
dir = /var/cache/perf-buildid

All buildids and binaries are be saved in the directory specified. The perf
record, buildid-list, buildid-cache, report, annotate, and archive commands
will it to pull information out.

The option can be set in the system-wide perfconfig file or in the
$HOME/.perfconfig file.

Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <4c055fb7.df0ce30a.5f0d.ffffae52@mx.google.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stephane Eranian
2010-06-01 21:25:01 +02:00
committed by Arnaldo Carvalho de Melo
parent 8e5564e6c7
commit 45de34bbe3
9 changed files with 89 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
tools/perf/util/build-id.c
View File

@ -43,19 +43,17 @@ struct perf_event_ops build_id__mark_dso_hit_ops = {
char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
{
char build_id_hex[BUILD_ID_SIZE * 2 + 1];
const char *home;
if (!self->has_build_id)
return NULL;
build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
home = getenv("HOME");
if (bf == NULL) {
if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home,
DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0)
if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
build_id_hex, build_id_hex + 2) < 0)
return NULL;
} else
snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home,
DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2);
snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
build_id_hex, build_id_hex + 2);
return bf;
}