| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1452276186-15202-8-git-send-email-acme@kernel.org>
Date: Fri, 8 Jan 2016 15:02:14 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
Andi Kleen <andi@...stfloor.org>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Peter Zijlstra <peterz@...radead.org>,
Steven Rostedt <rostedt@...dmis.org>,
Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 07/59] perf tools: Try to show pretty printed output for dynamic sort keys
From: Namhyung Kim <namhyung@...nel.org>
Each tracepoint event has format string for print to improve
readability. Try to parse the output and match the field name. If it
finds one, use that for the result. If not, fallbacks to the original
output.
For example, sort on kmem:kmalloc.gfp_flags looks like below:
(Note: libtraceevent plugins are not installed on my system. They might
affect the output below)
Before:
# Overhead Command gfp_flags
# ........ ....... ..........
#
99.89% perf 32848
0.06% sleep 208
0.03% perf 32976
0.01% perf 208
After:
# Overhead Command gfp_flags
# ........ ....... ...................
#
99.89% perf GFP_NOFS|GFP_ZERO
0.06% sleep GFP_KERNEL
0.03% perf GFP_KERNEL|GFP_ZERO
0.01% perf GFP_KERNEL
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1450804030-29193-7-git-send-email-namhyung@kernel.org
[ Fixed clash with earlier, updated patch in this patchkit ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/hist.c | 1 +
tools/perf/util/sort.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++---
tools/perf/util/sort.h | 1 +
3 files changed, 102 insertions(+), 5 deletions(-)
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 2dcf38a78f08..fdb97e16a8c3 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -997,6 +997,7 @@ void hist_entry__delete(struct hist_entry *he)
if (he->srcfile && he->srcfile[0])
free(he->srcfile);
free_callchain(he->callchain);
+ free(he->trace_output);
free(he->raw_data);
free(he);
}
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index cc659ba0e232..22d28c7e0b01 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1560,6 +1560,62 @@ static int hde_width(struct hpp_dynamic_entry *hde)
return hde->hpp.len;
}
+static char *get_trace_output(struct hist_entry *he)
+{
+ struct trace_seq seq;
+ struct perf_evsel *evsel;
+ struct pevent_record rec = {
+ .data = he->raw_data,
+ .size = he->raw_size,
+ };
+
+ evsel = hists_to_evsel(he->hists);
+
+ trace_seq_init(&seq);
+ pevent_event_info(&seq, evsel->tp_format, &rec);
+ return seq.buffer;
+}
+
+static void update_dynamic_len(struct hpp_dynamic_entry *hde,
+ struct hist_entry *he)
+{
+ char *str, *pos;
+ struct format_field *field = hde->field;
+ size_t namelen;
+ bool last = false;
+
+ /* parse pretty print result and update max length */
+ if (!he->trace_output)
+ he->trace_output = get_trace_output(he);
+
+ namelen = strlen(field->name);
+ str = he->trace_output;
+
+ while (str) {
+ pos = strchr(str, ' ');
+ if (pos == NULL) {
+ last = true;
+ pos = str + strlen(str);
+ }
+
+ if (!strncmp(str, field->name, namelen)) {
+ size_t len;
+
+ str += namelen + 1;
+ len = pos - str;
+
+ if (len > hde->dynamic_len)
+ hde->dynamic_len = len;
+ break;
+ }
+
+ if (last)
+ str = NULL;
+ else
+ str = pos + 1;
+ }
+}
+
static int __sort__hde_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
struct perf_evsel *evsel __maybe_unused)
{
@@ -1594,7 +1650,10 @@ static int __sort__hde_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
{
struct hpp_dynamic_entry *hde;
size_t len = fmt->user_len;
- struct trace_seq seq;
+ char *str, *pos;
+ struct format_field *field;
+ size_t namelen;
+ bool last = false;
int ret;
hde = container_of(fmt, struct hpp_dynamic_entry, hpp);
@@ -1605,10 +1664,43 @@ static int __sort__hde_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
if (hists_to_evsel(he->hists) != hde->evsel)
return scnprintf(hpp->buf, hpp->size, "%*.*s", len, len, "N/A");
- trace_seq_init(&seq);
- pevent_print_field(&seq, he->raw_data, hde->field);
- ret = scnprintf(hpp->buf, hpp->size, "%*.*s", len, len, seq.buffer);
- trace_seq_destroy(&seq);
+ field = hde->field;
+
+ namelen = strlen(field->name);
+ str = he->trace_output;
+
+ while (str) {
+ pos = strchr(str, ' ');
+ if (pos == NULL) {
+ last = true;
+ pos = str + strlen(str);
+ }
+
+ if (!strncmp(str, field->name, namelen)) {
+ str += namelen + 1;
+ str = strndup(str, pos - str);
+
+ if (str == NULL)
+ return scnprintf(hpp->buf, hpp->size,
+ "%*.*s", len, len, "ERROR");
+ break;
+ }
+
+ if (last)
+ str = NULL;
+ else
+ str = pos + 1;
+ }
+
+ if (str == NULL) {
+ struct trace_seq seq;
+ trace_seq_init(&seq);
+ pevent_print_field(&seq, he->raw_data, hde->field);
+ str = seq.buffer;
+ }
+
+ ret = scnprintf(hpp->buf, hpp->size, "%*.*s", len, len, str);
+ free(str);
return ret;
}
@@ -1638,6 +1730,9 @@ static int64_t __sort__hde_cmp(struct perf_hpp_fmt *fmt,
} else {
offset = field->offset;
size = field->size;
+
+ update_dynamic_len(hde, a);
+ update_dynamic_len(hde, b);
}
return memcmp(a->raw_data + offset, b->raw_data + offset, size);
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 1a00f1eb9d21..f6d2a7e3e7f2 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -124,6 +124,7 @@ struct hist_entry {
struct mem_info *mem_info;
void *raw_data;
u32 raw_size;
+ void *trace_output;
struct callchain_root callchain[0]; /* must be last member */
};
--
2.1.0
Powered by blists - more mailing lists