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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-13 14:39:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-13 14:39:42 -0800
commit9fdfbc2bff587f454dd95e2caa6d147c9abe39e4 (patch)
tree2feaee47cbcfb57dd0d5cf23509e22011541e717 /tools
parent8cea4eb642890a1de58980e7e1617d1765ef8f7c (diff)
parentdc1d628a67a8f042e711ea5accc0beedc3ef0092 (diff)
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Provide generic perf_sample_data initialization MAINTAINERS: Add Arnaldo as tools/perf/ co-maintainer perf trace: Don't use pager if scripting perf trace/scripting: Remove extraneous header read perf, ARM: Modify kuser rmb() call to compile for Thumb-2 x86/stacktrace: Don't dereference bad frame pointers perf archive: Don't try to collect files without a build-id perf_events, x86: Fixup fixed counter constraints perf, x86: Restrict the ANY flag perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLE perf, x86: add some IBS macros to perf_event.h perf, x86: make IBS macros available in perf_event.h hw-breakpoints: Remove stub unthrottle callback x86/hw-breakpoints: Remove the name field perf: Remove pointless breakpoint union perf lock: Drop the buffers multiplexing dependency perf lock: Fix and add misc documentally things percpu: Add __percpu sparse annotations to hw_breakpoint
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-lock.txt29
-rw-r--r--tools/perf/builtin-lock.c148
-rw-r--r--tools/perf/builtin-trace.c4
-rw-r--r--tools/perf/command-list.txt1
-rw-r--r--tools/perf/perf-archive.sh3
-rw-r--r--tools/perf/perf.h4
-rw-r--r--tools/perf/util/probe-event.c2
7 files changed, 182 insertions, 9 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
new file mode 100644
index 00000000000..b317102138c
--- /dev/null
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -0,0 +1,29 @@
+perf-lock(1)
+============
+
+NAME
+----
+perf-lock - Analyze lock events
+
+SYNOPSIS
+--------
+[verse]
+'perf lock' {record|report|trace}
+
+DESCRIPTION
+-----------
+You can analyze various lock behaviours
+and statistics with this 'perf lock' command.
+
+ 'perf lock record <command>' records lock events
+ between start and end <command>. And this command
+ produces the file "perf.data" which contains tracing
+ results of lock events.
+
+ 'perf lock trace' shows raw lock events.
+
+ 'perf lock report' reports statistical data.
+
+SEE ALSO
+--------
+linkperf:perf[1]
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index fb9ab2ad3f9..e12c844df1e 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -460,6 +460,150 @@ process_raw_event(void *data, int cpu,
process_lock_release_event(data, event, cpu, timestamp, thread);
}
+struct raw_event_queue {
+ u64 timestamp;
+ int cpu;
+ void *data;
+ struct thread *thread;
+ struct list_head list;
+};
+
+static LIST_HEAD(raw_event_head);
+
+#define FLUSH_PERIOD (5 * NSEC_PER_SEC)
+
+static u64 flush_limit = ULLONG_MAX;
+static u64 last_flush = 0;
+struct raw_event_queue *last_inserted;
+
+static void flush_raw_event_queue(u64 limit)
+{
+ struct raw_event_queue *tmp, *iter;
+
+ list_for_each_entry_safe(iter, tmp, &raw_event_head, list) {
+ if (iter->timestamp > limit)
+ return;
+
+ if (iter == last_inserted)
+ last_inserted = NULL;
+
+ process_raw_event(iter->data, iter->cpu, iter->timestamp,
+ iter->thread);
+
+ last_flush = iter->timestamp;
+ list_del(&iter->list);
+ free(iter->data);
+ free(iter);
+ }
+}
+
+static void __queue_raw_event_end(struct raw_event_queue *new)
+{
+ struct raw_event_queue *iter;
+
+ list_for_each_entry_reverse(iter, &raw_event_head, list) {
+ if (iter->timestamp < new->timestamp) {
+ list_add(&new->list, &iter->list);
+ return;
+ }
+ }
+
+ list_add(&new->list, &raw_event_head);
+}
+
+static void __queue_raw_event_before(struct raw_event_queue *new,
+ struct raw_event_queue *iter)
+{
+ list_for_each_entry_continue_reverse(iter, &raw_event_head, list) {
+ if (iter->timestamp < new->timestamp) {
+ list_add(&new->list, &iter->list);
+ return;
+ }
+ }
+
+ list_add(&new->list, &raw_event_head);
+}
+
+static void __queue_raw_event_after(struct raw_event_queue *new,
+ struct raw_event_queue *iter)
+{
+ list_for_each_entry_continue(iter, &raw_event_head, list) {
+ if (iter->timestamp > new->timestamp) {
+ list_add_tail(&new->list, &iter->list);
+ return;
+ }
+ }
+ list_add_tail(&new->list, &raw_event_head);
+}
+
+/* The queue is ordered by time */
+static void __queue_raw_event(struct raw_event_queue *new)
+{
+ if (!last_inserted) {
+ __queue_raw_event_end(new);
+ return;
+ }
+
+ /*
+ * Most of the time the current event has a timestamp
+ * very close to the last event inserted, unless we just switched
+ * to another event buffer. Having a sorting based on a list and
+ * on the last inserted event that is close to the current one is
+ * probably more efficient than an rbtree based sorting.
+ */
+ if (last_inserted->timestamp >= new->timestamp)
+ __queue_raw_event_before(new, last_inserted);
+ else
+ __queue_raw_event_after(new, last_inserted);
+}
+
+static void queue_raw_event(void *data, int raw_size, int cpu,
+ u64 timestamp, struct thread *thread)
+{
+ struct raw_event_queue *new;
+
+ if (flush_limit == ULLONG_MAX)
+ flush_limit = timestamp + FLUSH_PERIOD;
+
+ if (timestamp < last_flush) {
+ printf("Warning: Timestamp below last timeslice flush\n");
+ return;
+ }
+
+ new = malloc(sizeof(*new));
+ if (!new)
+ die("Not enough memory\n");
+
+ new->timestamp = timestamp;
+ new->cpu = cpu;
+ new->thread = thread;
+
+ new->data = malloc(raw_size);
+ if (!new->data)
+ die("Not enough memory\n");
+
+ memcpy(new->data, data, raw_size);
+
+ __queue_raw_event(new);
+ last_inserted = new;
+
+ /*
+ * We want to have a slice of events covering 2 * FLUSH_PERIOD
+ * If FLUSH_PERIOD is big enough, it ensures every events that occured
+ * in the first half of the timeslice have all been buffered and there
+ * are none remaining (we need that because of the weakly ordered
+ * event recording we have). Then once we reach the 2 * FLUSH_PERIOD
+ * timeslice, we flush the first half to be gentle with the memory
+ * (the second half can still get new events in the middle, so wait
+ * another period to flush it)
+ */
+ if (new->timestamp > flush_limit &&
+ new->timestamp - flush_limit > FLUSH_PERIOD) {
+ flush_limit += FLUSH_PERIOD;
+ flush_raw_event_queue(flush_limit);
+ }
+}
+
static int process_sample_event(event_t *event, struct perf_session *session)
{
struct thread *thread;
@@ -480,7 +624,7 @@ static int process_sample_event(event_t *event, struct perf_session *session)
if (profile_cpu != -1 && profile_cpu != (int) data.cpu)
return 0;
- process_raw_event(data.raw_data, data.cpu, data.time, thread);
+ queue_raw_event(data.raw_data, data.raw_size, data.cpu, data.time, thread);
return 0;
}
@@ -576,6 +720,7 @@ static void __cmd_report(void)
setup_pager();
select_key();
read_events();
+ flush_raw_event_queue(ULLONG_MAX);
sort_result();
print_result();
}
@@ -608,7 +753,6 @@ static const char *record_args[] = {
"record",
"-a",
"-R",
- "-M",
"-f",
"-m", "1024",
"-c", "1",
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 5db687fc13d..407041d20de 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -573,7 +573,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used)
if (symbol__init() < 0)
return -1;
- setup_pager();
+ if (!script_name)
+ setup_pager();
session = perf_session__new(input_name, O_RDONLY, 0);
if (session == NULL)
@@ -608,7 +609,6 @@ int cmd_trace(int argc, const char **argv, const char *prefix __used)
return -1;
}
- perf_header__read(&session->header, input);
err = scripting_ops->generate_script("perf-trace");
goto out;
}
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index 9afcff2e3ae..db6ee94d4a8 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -18,3 +18,4 @@ perf-top mainporcelain common
perf-trace mainporcelain common
perf-probe mainporcelain common
perf-kmem mainporcelain common
+perf-lock mainporcelain common
diff --git a/tools/perf/perf-archive.sh b/tools/perf/perf-archive.sh
index 45fbe2f07b1..910468e6e01 100644
--- a/tools/perf/perf-archive.sh
+++ b/tools/perf/perf-archive.sh
@@ -9,8 +9,9 @@ fi
DEBUGDIR=~/.debug/
BUILDIDS=$(mktemp /tmp/perf-archive-buildids.XXXXXX)
+NOBUILDID=0000000000000000000000000000000000000000
-perf buildid-list -i $PERF_DATA --with-hits > $BUILDIDS
+perf buildid-list -i $PERF_DATA --with-hits | grep -v "^$NOBUILDID " > $BUILDIDS
if [ ! -s $BUILDIDS ] ; then
echo "perf archive: no build-ids found"
rm -f $BUILDIDS
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 75f941bfba9..6fb379bc1d1 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -65,9 +65,7 @@
* Use the __kuser_memory_barrier helper in the CPU helper page. See
* arch/arm/kernel/entry-armv.S in the kernel source for details.
*/
-#define rmb() asm volatile("mov r0, #0xffff0fff; mov lr, pc;" \
- "sub pc, r0, #95" ::: "r0", "lr", "cc", \
- "memory")
+#define rmb() ((void(*)(void))0xffff0fa0)()
#define cpu_relax() asm volatile("":::"memory")
#endif
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index c971e81e9cb..53181dbfe4a 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -508,8 +508,8 @@ void show_perf_probe_events(void)
struct str_node *ent;
setup_pager();
-
memset(&pp, 0, sizeof(pp));
+
fd = open_kprobe_events(O_RDONLY, 0);
rawlist = get_trace_kprobe_event_rawlist(fd);
close(fd);