aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/util
diff options
context:
space:
mode:
authorMasami Hiramatsu <mhiramat@redhat.com>2009-12-08 17:03:23 -0500
committerIngo Molnar <mingo@elte.hu>2009-12-09 07:26:53 +0100
commitfa28244d12337eebcc620b23852ec3cf29582ff9 (patch)
treeac193550d55be55dba279a57e4ee3a3e41674db0 /tools/perf/util
parenta7c312bed772c11138409c3a98531e85d690302e (diff)
downloadkernel_samsung_tuna-fa28244d12337eebcc620b23852ec3cf29582ff9.zip
kernel_samsung_tuna-fa28244d12337eebcc620b23852ec3cf29582ff9.tar.gz
kernel_samsung_tuna-fa28244d12337eebcc620b23852ec3cf29582ff9.tar.bz2
perf probe: Support --del option
Support perf probe --del <event> option. Currently, perf probe can have only one event for each --del option. If you'd like to delete several probe events, you need to specify --del for each events. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jim Keniston <jkenisto@us.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jason Baron <jbaron@redhat.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20091208220323.10142.62079.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/probe-event.c69
-rw-r--r--tools/perf/util/probe-event.h1
2 files changed, 66 insertions, 4 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 31beedc..9480d99 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -430,10 +430,11 @@ void show_perf_probe_events(void)
}
/* Get current perf-probe event names */
-static struct strlist *get_perf_event_names(int fd)
+static struct strlist *get_perf_event_names(int fd, bool include_group)
{
unsigned int i;
char *group, *event;
+ char buf[128];
struct strlist *sl, *rawlist;
struct str_node *ent;
@@ -443,7 +444,12 @@ static struct strlist *get_perf_event_names(int fd)
for (i = 0; i < strlist__nr_entries(rawlist); i++) {
ent = strlist__entry(rawlist, i);
parse_trace_kprobe_event(ent->s, &group, &event, NULL);
- strlist__add(sl, event);
+ if (include_group) {
+ if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
+ die("Failed to copy group:event name.");
+ strlist__add(sl, buf);
+ } else
+ strlist__add(sl, event);
free(group);
free(event);
}
@@ -457,9 +463,10 @@ static void write_trace_kprobe_event(int fd, const char *buf)
{
int ret;
+ pr_debug("Writing event: %s\n", buf);
ret = write(fd, buf, strlen(buf));
if (ret <= 0)
- die("Failed to create event.");
+ die("Failed to write event: %s", strerror(errno));
}
static void get_new_event_name(char *buf, size_t len, const char *base,
@@ -496,7 +503,7 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes)
fd = open_kprobe_events(O_RDWR, O_APPEND);
/* Get current event names */
- namelist = get_perf_event_names(fd);
+ namelist = get_perf_event_names(fd, false);
for (j = 0; j < nr_probes; j++) {
pp = probes + j;
@@ -524,3 +531,57 @@ void add_trace_kprobe_events(struct probe_point *probes, int nr_probes)
strlist__delete(namelist);
close(fd);
}
+
+static void del_trace_kprobe_event(int fd, const char *group,
+ const char *event, struct strlist *namelist)
+{
+ char buf[128];
+
+ if (e_snprintf(buf, 128, "%s:%s", group, event) < 0)
+ die("Failed to copy event.");
+ if (!strlist__has_entry(namelist, buf)) {
+ pr_warning("Warning: event \"%s\" is not found.\n", buf);
+ return;
+ }
+ /* Convert from perf-probe event to trace-kprobe event */
+ if (e_snprintf(buf, 128, "-:%s/%s", group, event) < 0)
+ die("Failed to copy event.");
+
+ write_trace_kprobe_event(fd, buf);
+ printf("Remove event: %s:%s\n", group, event);
+}
+
+void del_trace_kprobe_events(struct strlist *dellist)
+{
+ int fd;
+ unsigned int i;
+ const char *group, *event;
+ char *p, *str;
+ struct str_node *ent;
+ struct strlist *namelist;
+
+ fd = open_kprobe_events(O_RDWR, O_APPEND);
+ /* Get current event names */
+ namelist = get_perf_event_names(fd, true);
+
+ for (i = 0; i < strlist__nr_entries(dellist); i++) {
+ ent = strlist__entry(dellist, i);
+ str = strdup(ent->s);
+ if (!str)
+ die("Failed to copy event.");
+ p = strchr(str, ':');
+ if (p) {
+ group = str;
+ *p = '\0';
+ event = p + 1;
+ } else {
+ group = PERFPROBE_GROUP;
+ event = str;
+ }
+ del_trace_kprobe_event(fd, group, event, namelist);
+ free(str);
+ }
+ strlist__delete(namelist);
+ close(fd);
+}
+
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index 0c6fe56..f752159 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -10,6 +10,7 @@ extern void parse_trace_kprobe_event(const char *str, char **group,
char **event, struct probe_point *pp);
extern int synthesize_trace_kprobe_event(struct probe_point *pp);
extern void add_trace_kprobe_events(struct probe_point *probes, int nr_probes);
+extern void del_trace_kprobe_events(struct strlist *dellist);
extern void show_perf_probe_events(void);
/* Maximum index number of event-name postfix */