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perf probe: Remove caches when --cache is given

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'perf probe --del' removes caches when '--cache' is given.  Note that
the delete pattern is not the same as for 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 cached 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 <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/146736021651.27797.10250879847070772920.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu
2016-07-01 17:03:36 +09:00
committed by Arnaldo Carvalho de Melo
parent 1f3736c9c8
commit 4a0f65c102
4 changed files with 60 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
tools/perf/builtin-probe.c
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@@ -363,6 +363,32 @@ out_cleanup:
return ret;
}
static int del_perf_probe_caches(struct strfilter *filter)
{
struct probe_cache *cache;
struct strlist *bidlist;
struct str_node *nd;
int ret;
bidlist = build_id_cache__list_all();
if (!bidlist) {
ret = -errno;
pr_debug("Failed to get buildids: %d\n", ret);
return ret ?: -ENOMEM;
}
strlist__for_each_entry(nd, bidlist) {
cache = probe_cache__new(nd->s);
if (!cache)
continue;
if (probe_cache__filter_purge(cache, filter) < 0 ||
probe_cache__commit(cache) < 0)
pr_warning("Failed to remove entries for %s\n", nd->s);
probe_cache__delete(cache);
}
return 0;
}
static int perf_del_probe_events(struct strfilter *filter)
{
int ret, ret2, ufd = -1, kfd = -1;
@@ -375,6 +401,9 @@ static int perf_del_probe_events(struct strfilter *filter)
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);
if (ret < 0)