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Message-ID: <20150715091516.8915.60437.stgit@localhost.localdomain>
Date: Wed, 15 Jul 2015 18:15:16 +0900
From: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
linux-kernel@...r.kernel.org,
Adrian Hunter <adrian.hunter@...el.com>,
Ingo Molnar <mingo@...hat.com>,
Paul Mackerras <paulus@...ba.org>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Borislav Petkov <bp@...e.de>,
Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: [RFC PATCH perf/core v2 12/16] perf probe: Remove caches when
--cache is given
perf-probe --del removes caches when --cache is given.
Note that the delete pattern is not same as normal events.
If you cached probes with event name, --del "eventname"
works as expected. However, if you skipped it, the cached
probes doesn't have actual event name. In that case
--del "probe-desc" is required (wildcard is acceptable).
For example a cache entry has the probe-desc "vfs_read $params",
you can remove it with --del 'vfs_read*'.
-----
# perf probe --cache --list
/[kernel.kallsyms] (1466a0a250b5d0070c6d0f03c5fed30b237970a1):
vfs_read $params
/usr/lib64/libc-2.17.so (c31ffe7942bfd77b2fca8f9bd5709d387a86d3bc):
getaddrinfo $params
# perf probe --cache --del vfs_read\*
Removed event: probe:vfs_read
# perf probe --cache --list
/[kernel.kallsyms] (1466a0a250b5d0070c6d0f03c5fed30b237970a1):
/usr/lib64/libc-2.17.so (c31ffe7942bfd77b2fca8f9bd5709d387a86d3bc):
getaddrinfo $params
-----
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
---
Changes in v2:
- Update perf-probe.txt
---
tools/perf/Documentation/perf-probe.txt | 1 +
tools/perf/util/probe-event.c | 26 ++++++++++++++++++++++++
tools/perf/util/probe-file.c | 33 +++++++++++++++++++++++--------
tools/perf/util/probe-file.h | 2 ++
4 files changed, 54 insertions(+), 8 deletions(-)
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 5a70d45..8d09173 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -116,6 +116,7 @@ OPTIONS
(With --add) Cache the probes. Any events which successfully added
are also stored in the cache file.
(With --list) Show cached probes.
+ (With --del) Remove cached probes.
--max-probes=NUM::
Set the maximum number of probe points for an event. Default is 128.
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 23b577b..262f9d3 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -2746,6 +2746,30 @@ end:
return ret;
}
+static int del_perf_probe_caches(struct strfilter *filter)
+{
+ struct probe_cache *cache;
+ struct strlist *bidlist;
+ struct str_node *nd;
+ int ret;
+
+ ret = build_id_cache__list_all(&bidlist);
+ if (ret < 0) {
+ pr_debug("Failed to get buildids: %d\n", ret);
+ return ret;
+ }
+
+ strlist__for_each(nd, bidlist) {
+ cache = probe_cache__new(nd->s);
+ if (!cache)
+ continue;
+ probe_cache__remove_entries(cache, filter);
+ probe_cache__commit(cache);
+ probe_cache__delete(cache);
+ }
+ return 0;
+}
+
int del_perf_probe_events(struct strfilter *filter)
{
int ret, ret2, ufd = -1, kfd = -1;
@@ -2755,6 +2779,8 @@ int del_perf_probe_events(struct strfilter *filter)
return -EINVAL;
pr_debug("Delete filter: \'%s\'\n", str);
+ if (probe_conf.cache)
+ return del_perf_probe_caches(filter);
/* Get current event names */
ret = probe_file__open_both(&kfd, &ufd, PF_FL_RW);
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index da69ff7..b3a69a3 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -371,7 +371,6 @@ static int probe_cache__open(struct probe_cache *pcache, const char *target)
return ret;
}
}
-
dir_name = build_id_cache__dirname_from_path(sbuildid, target,
is_kallsyms, false);
found:
@@ -627,19 +626,37 @@ out:
return ret;
}
+static bool probe_cache_entry__compare(struct probe_cache_entry *entry,
+ struct strfilter *filter)
+{
+ char buf[128], *ptr = entry->spev;
+
+ if (entry->pev.event) {
+ snprintf(buf, 128, "%s:%s", entry->pev.group, entry->pev.event);
+ ptr = buf;
+ }
+ return strfilter__compare(filter, ptr);
+}
+
+int probe_cache__remove_entries(struct probe_cache *pcache,
+ struct strfilter *filter)
+{
+ struct probe_cache_entry *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &pcache->list, list) {
+ if (probe_cache_entry__compare(entry, filter))
+ probe_cache_entry__delete(entry);
+ }
+ return 0;
+}
+
static int probe_cache__show_entries(struct probe_cache *pcache,
struct strfilter *filter)
{
struct probe_cache_entry *entry;
- char buf[128], *ptr;
list_for_each_entry(entry, &pcache->list, list) {
- if (entry->pev.event) {
- ptr = buf;
- snprintf(buf, 128, "%s:%s", entry->pev.group, entry->pev.event);
- } else
- ptr = entry->spev;
- if (strfilter__compare(filter, ptr))
+ if (probe_cache_entry__compare(entry, filter))
printf("%s\n", entry->spev);
}
return 0;
diff --git a/tools/perf/util/probe-file.h b/tools/perf/util/probe-file.h
index 26dc4f7..391fde0 100644
--- a/tools/perf/util/probe-file.h
+++ b/tools/perf/util/probe-file.h
@@ -34,6 +34,8 @@ int probe_cache__add_entry(struct probe_cache *pcache,
struct probe_trace_event *tevs, int ntevs);
int probe_cache__commit(struct probe_cache *pcache);
void probe_cache__delete(struct probe_cache *pcache);
+int probe_cache__remove_entries(struct probe_cache *pcache,
+ struct strfilter *filter);
struct probe_cache_entry *probe_cache__find(struct probe_cache *pcache,
struct perf_probe_event *pev);
struct probe_cache_entry *probe_cache__find_by_name(struct probe_cache *pcache,
--
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