Re: [PATCH v1 8/9] perf diff: Print the basic block cycles diff
From: Jin, Yao
Date: Thu May 23 2019 - 20:42:47 EST
On 5/22/2019 10:04 PM, Jiri Olsa wrote:
On Mon, May 20, 2019 at 09:27:55PM +0800, Jin Yao wrote:
Currently we only support sorting by diff cycles.
For example,
perf record -b ./div
perf record -b ./div
perf diff --basic-block
# Cycles diff Basic block (start:end)
# ........... .......................
#
-20 native_write_msr (7fff9a069900:7fff9a06990b)
-3 __indirect_thunk_start (7fff9ac02ca0:7fff9ac02ca0)
1 __indirect_thunk_start (7fff9ac02cac:7fff9ac02cb0)
0 rand@plt (490:490)
0 rand (3af60:3af64)
0 rand (3af69:3af6d)
0 main (4e8:4ea)
0 main (4ef:500)
0 main (4ef:535)
0 compute_flag (640:644)
0 compute_flag (649:659)
0 __random_r (3ac40:3ac76)
0 __random_r (3ac40:3ac88)
0 __random_r (3ac90:3ac9c)
0 __random (3aac0:3aad2)
0 __random (3aae0:3aae7)
0 __random (3ab03:3ab0f)
0 __random (3ab14:3ab1b)
0 __random (3ab28:3ab2e)
0 __random (3ab4a:3ab53)
really nice, could you keep the standard diff format
and display the 'Baseline' and Shared Object columns?
jirka
Thanks Jiri!
Let me check how to do that.
Thanks
Jin Yao
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
---
tools/perf/builtin-diff.c | 168 ++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/hist.c | 2 +-
tools/perf/util/sort.h | 1 +
3 files changed, 170 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 47e34a3..dbf242d 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -27,6 +27,12 @@
#include <stdlib.h>
#include <math.h>
+struct block_hpp_fmt {
+ struct perf_hpp_fmt fmt;
+ struct data__file *file;
+ int width;
+};
+
struct block_hists {
struct hists sym_hists;
struct perf_hpp_list sym_list;
@@ -34,6 +40,8 @@ struct block_hists {
struct hists hists;
struct perf_hpp_list list;
struct perf_hpp_fmt fmt;
+ struct block_hpp_fmt block_fmt;
+ struct perf_hpp_fmt desc_fmt;
};
struct perf_diff {
@@ -1157,6 +1165,162 @@ static void compute_block_hists_diff(struct block_hists *block_hists,
}
}
+static int64_t block_cycles_diff_cmp(struct perf_hpp_fmt *fmt,
+ struct hist_entry *left,
+ struct hist_entry *right)
+{
+ struct block_hpp_fmt *block_fmt = container_of(fmt,
+ struct block_hpp_fmt,
+ fmt);
+ struct data__file *d = block_fmt->file;
+ bool pairs_left = hist_entry__has_pairs(left);
+ bool pairs_right = hist_entry__has_pairs(right);
+ struct hist_entry *p_right, *p_left;
+ s64 l, r;
+
+ if (!pairs_left && !pairs_right)
+ return 0;
+
+ if (!pairs_left || !pairs_right)
+ return pairs_left ? -1 : 1;
+
+ p_left = get_pair_data(left, d);
+ p_right = get_pair_data(right, d);
+
+ if (!p_left && !p_right)
+ return 0;
+
+ if (!p_left || !p_right)
+ return p_left ? -1 : 1;
+
+ l = abs(p_left->diff.cycles_diff);
+ r = abs(p_right->diff.cycles_diff);
+
+ return r - l;
+}
+
+static int64_t block_diff_sort(struct perf_hpp_fmt *fmt,
+ struct hist_entry *left, struct hist_entry *right)
+{
+ return block_cycles_diff_cmp(fmt, right, left);
+}
+
+static int block_diff_header(struct perf_hpp_fmt *fmt __maybe_unused,
+ struct perf_hpp *hpp,
+ struct hists *hists __maybe_unused,
+ int line __maybe_unused,
+ int *span __maybe_unused)
+{
+ return scnprintf(hpp->buf, hpp->size, "Cycles diff");
+}
+
+static int block_diff_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+ struct hist_entry *he)
+{
+ struct block_hpp_fmt *block_fmt = container_of(fmt,
+ struct block_hpp_fmt,
+ fmt);
+ struct data__file *d = block_fmt->file;
+ struct hist_entry *pair = get_pair_data(he, d);
+
+ if (pair && pair->diff.computed) {
+ return scnprintf(hpp->buf, hpp->size, "%*ld", block_fmt->width,
+ pair->diff.cycles_diff);
+ }
+
+ return scnprintf(hpp->buf, hpp->size, "%*s", block_fmt->width, " ");
+}
+
+static int block_diff_width(struct perf_hpp_fmt *fmt,
+ struct perf_hpp *hpp __maybe_unused,
+ struct hists *hists __maybe_unused)
+{
+ struct block_hpp_fmt *block_fmt =
+ container_of(fmt, struct block_hpp_fmt, fmt);
+
+ return block_fmt->width;
+}
+
+static int block_sym_width(struct perf_hpp_fmt *fmt __maybe_unused,
+ struct perf_hpp *hpp __maybe_unused,
+ struct hists *hists __maybe_unused)
+{
+ return 23;
+}
+
+static int block_sym_entry(struct perf_hpp_fmt *fmt __maybe_unused,
+ struct perf_hpp *hpp, struct hist_entry *he)
+{
+ struct block_info *bi = he->block_info;
+
+ return scnprintf(hpp->buf, hpp->size, "%s (%lx:%lx)",
+ bi->sym->name, bi->sym->start + bi->start,
+ bi->sym->start + bi->end);
+}
+
+static int block_sym_header(struct perf_hpp_fmt *fmt __maybe_unused,
+ struct perf_hpp *hpp,
+ struct hists *hists __maybe_unused,
+ int line __maybe_unused,
+ int *span __maybe_unused)
+{
+ return scnprintf(hpp->buf, hpp->size, "Basic block (start:end)");
+}
+
+static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
+{
+ he->not_collen = true;
+
+ return 0;
+}
+
+static void hists_block_printf_sorted(struct hists *hists)
+{
+ hists__fprintf(hists, true, 0, 0, 0, stdout, true);
+}
+
+static void init_block_hists_fmt(void)
+{
+ struct block_hists *hists_base = &data__files[0].block_hists;
+ struct data__file *d;
+ int i;
+ struct perf_hpp_fmt *fmt;
+
+ perf_hpp__reset_output_field(&hists_base->list);
+
+ hists_base->list.nr_header_lines = 1;
+
+ data__for_each_file_new(i, d) {
+ struct block_hpp_fmt *block_fmt = &d->block_hists.block_fmt;
+
+ fmt = &block_fmt->fmt;
+ block_fmt->file = d;
+ block_fmt->width = 11;
+
+ INIT_LIST_HEAD(&fmt->list);
+ INIT_LIST_HEAD(&fmt->sort_list);
+
+ fmt->sort = block_diff_sort;
+ fmt->header = block_diff_header;
+ fmt->entry = block_diff_entry;
+ fmt->width = block_diff_width;
+
+ perf_hpp_list__column_register(&hists_base->list, fmt);
+ perf_hpp_list__register_sort_field(&hists_base->list, fmt);
+ }
+
+ /* fmt for description */
+ fmt = &hists_base->desc_fmt;
+
+ fmt->width = block_sym_width;
+ fmt->entry = block_sym_entry;
+ fmt->header = block_sym_header;
+ fmt->sort = hist_entry__cmp_nop;
+
+ perf_hpp_list__column_register(&hists_base->list, fmt);
+ perf_hpp_list__register_sort_field(&hists_base->list, fmt);
+}
+
static void basic_block_process(void)
{
struct hists *hists_base = &data__files[0].block_hists.hists;
@@ -1182,6 +1346,10 @@ static void basic_block_process(void)
compute_block_hists_diff(&data__files[0].block_hists, d);
}
+ init_block_hists_fmt();
+ hists__output_resort_cb(hists_base, NULL, filter_cb);
+ hists_block_printf_sorted(hists_base);
+
data__for_each_file(i, d) {
hists__delete_entries(&d->block_hists.sym_hists);
hists__delete_entries(&d->block_hists.hists);
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 3810460..ae95191 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1846,7 +1846,7 @@ static void output_resort(struct hists *hists, struct ui_progress *prog,
__hists__insert_output_entry(&hists->entries, n, min_callchain_hits, use_callchain);
hists__inc_stats(hists, n);
- if (!n->filtered)
+ if ((!n->filtered) && (!n->not_collen))
hists__calc_col_len(hists, n);
if (prog)
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index de9e61a..1e921fe 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -121,6 +121,7 @@ struct hist_entry {
char level;
u8 filtered;
+ bool not_collen;
u16 callchain_size;
union {
--
2.7.4