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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

36
tools/perf/util/probe-file.c
View File

@@ -684,20 +684,40 @@ 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__filter_purge(struct probe_cache *pcache,
struct strfilter *filter)
{
struct probe_cache_entry *entry, *tmp;
list_for_each_entry_safe(entry, tmp, &pcache->entries, node) {
if (probe_cache_entry__compare(entry, filter)) {
pr_info("Removed cached event: %s\n", entry->spev);
list_del_init(&entry->node);
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->entries, node) {
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;