diff options
| -rw-r--r-- | tools/perf/builtin-ftrace.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 08c1cc429b27..90cf2c9915a7 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -796,8 +796,10 @@ static void make_histogram(struct perf_ftrace *ftrace, int buckets[], // than the min latency desired. if (num > 0) // 1st entry: [ 1 unit .. bucket_range units ] i = num / ftrace->bucket_range + 1; + if (num >= max_latency - min_latency) + i = NUM_BUCKET -1; } - if (i >= NUM_BUCKET || num >= max_latency - min_latency) + if (i >= NUM_BUCKET) i = NUM_BUCKET - 1; num += min_latency; @@ -1738,7 +1740,7 @@ int cmd_ftrace(int argc, const char **argv) ret = -EINVAL; goto out_delete_filters; } - if (!ftrace.min_latency) { + if (ftrace.bucket_range && !ftrace.min_latency) { /* default min latency should be the bucket range */ ftrace.min_latency = ftrace.bucket_range; } @@ -1749,7 +1751,7 @@ int cmd_ftrace(int argc, const char **argv) ret = -EINVAL; goto out_delete_filters; } - if (!ftrace.max_latency) { + if (ftrace.bucket_range && !ftrace.max_latency) { /* default max latency should depend on bucket range and num_buckets */ ftrace.max_latency = (NUM_BUCKET - 2) * ftrace.bucket_range + ftrace.min_latency; |