diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/perf_counter.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index 95093104195..48471d75ae0 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -1688,6 +1688,18 @@ static int perf_release(struct inode *inode, struct file *file) return 0; } +static u64 perf_counter_read_tree(struct perf_counter *counter) +{ + struct perf_counter *child; + u64 total = 0; + + total += perf_counter_read(counter); + list_for_each_entry(child, &counter->child_list, child_list) + total += perf_counter_read(child); + + return total; +} + /* * Read the performance counter - simple non blocking version for now */ @@ -1707,7 +1719,7 @@ perf_read_hw(struct perf_counter *counter, char __user *buf, size_t count) WARN_ON_ONCE(counter->ctx->parent_ctx); mutex_lock(&counter->child_mutex); - values[0] = perf_counter_read(counter); + values[0] = perf_counter_read_tree(counter); n = 1; if (counter->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) values[n++] = counter->total_time_enabled + |