[PATCH 07/10] perf report: Accept fifos as input file
From: Robert Richter
Date: Tue Dec 06 2011 - 05:35:35 EST
The default input file for perf report is not handled the same way as
perf record does it for its output file. This leads to unexpected
behavior of perf report, etc. E.g.:
# perf record -a -e cpu-cycles sleep 2 | perf report | cat
failed to open perf.data: No such file or directory (try 'perf record' first)
While perf record writes to a fifo, perf report expects perf.data to
be read. This patch changes this to accept fifos as input file.
Applies to the following commands:
perf annotate
perf buildid-list
perf evlist
perf kmem
perf lock
perf report
perf sched
perf script
perf timechart
Also fixes char const* -> const char* type declaration for filename
strings.
Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
tools/perf/Documentation/perf-annotate.txt | 2 +-
tools/perf/Documentation/perf-buildid-list.txt | 2 +-
tools/perf/Documentation/perf-evlist.txt | 2 +-
tools/perf/Documentation/perf-kmem.txt | 2 +-
tools/perf/Documentation/perf-lock.txt | 2 +-
tools/perf/Documentation/perf-report.txt | 2 +-
tools/perf/Documentation/perf-sched.txt | 2 +-
tools/perf/Documentation/perf-script.txt | 2 +-
tools/perf/Documentation/perf-timechart.txt | 2 +-
tools/perf/builtin-annotate.c | 4 ++--
tools/perf/builtin-buildid-list.c | 19 ++++++++++---------
tools/perf/builtin-evlist.c | 2 +-
tools/perf/builtin-kmem.c | 2 +-
tools/perf/builtin-lock.c | 2 +-
tools/perf/builtin-report.c | 4 ++--
tools/perf/builtin-sched.c | 2 +-
tools/perf/builtin-script.c | 4 ++--
tools/perf/builtin-timechart.c | 4 ++--
tools/perf/util/session.c | 15 +++++++++++++--
19 files changed, 44 insertions(+), 32 deletions(-)
diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index fe6762e..0d0f217 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -22,7 +22,7 @@ OPTIONS
-------
-i::
--input=::
- Input file name. (default: perf.data)
+ Input file name. (default: perf.data unless stdin is a fifo)
-d::
--dsos=<dso[,dso...]>::
diff --git a/tools/perf/Documentation/perf-buildid-list.txt b/tools/perf/Documentation/perf-buildid-list.txt
index cc22325..25c52ef 100644
--- a/tools/perf/Documentation/perf-buildid-list.txt
+++ b/tools/perf/Documentation/perf-buildid-list.txt
@@ -26,7 +26,7 @@ OPTIONS
Show only DSOs with hits.
-i::
--input=::
- Input file name. (default: perf.data)
+ Input file name. (default: perf.data unless stdin is a fifo)
-f::
--force::
Don't do ownership validation.
diff --git a/tools/perf/Documentation/perf-evlist.txt b/tools/perf/Documentation/perf-evlist.txt
index 0cada9e..0507ec7 100644
--- a/tools/perf/Documentation/perf-evlist.txt
+++ b/tools/perf/Documentation/perf-evlist.txt
@@ -18,7 +18,7 @@ OPTIONS
-------
-i::
--input=::
- Input file name. (default: perf.data)
+ Input file name. (default: perf.data unless stdin is a fifo)
SEE ALSO
--------
diff --git a/tools/perf/Documentation/perf-kmem.txt b/tools/perf/Documentation/perf-kmem.txt
index a52fcde..7c8fbbf 100644
--- a/tools/perf/Documentation/perf-kmem.txt
+++ b/tools/perf/Documentation/perf-kmem.txt
@@ -23,7 +23,7 @@ OPTIONS
-------
-i <file>::
--input=<file>::
- Select the input file (default: perf.data)
+ Select the input file (default: perf.data unless stdin is a fifo)
--caller::
Show per-callsite statistics
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index 4a26a2f..d6b2a4f 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -29,7 +29,7 @@ COMMON OPTIONS
-i::
--input=<file>::
- Input file name.
+ Input file name. (default: perf.data unless stdin is a fifo)
-v::
--verbose::
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 212f24d..a67be86 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -19,7 +19,7 @@ OPTIONS
-------
-i::
--input=::
- Input file name. (default: perf.data)
+ Input file name. (default: perf.data unless stdin is a fifo)
-v::
--verbose::
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt
index 5b212b5..8ff4df9 100644
--- a/tools/perf/Documentation/perf-sched.txt
+++ b/tools/perf/Documentation/perf-sched.txt
@@ -40,7 +40,7 @@ OPTIONS
-------
-i::
--input=<file>::
- Input file name. (default: perf.data)
+ Input file name. (default: perf.data unless stdin is a fifo)
-v::
--verbose::
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index dec87ec..d465c11 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -106,7 +106,7 @@ OPTIONS
-i::
--input=::
- Input file name.
+ Input file name. (default: perf.data unless stdin is a fifo)
-d::
--debug-mode::
diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
index d7b79e2..1632b0e 100644
--- a/tools/perf/Documentation/perf-timechart.txt
+++ b/tools/perf/Documentation/perf-timechart.txt
@@ -27,7 +27,7 @@ OPTIONS
Select the output file (default: output.svg)
-i::
--input=::
- Select the input file (default: perf.data)
+ Select the input file (default: perf.data unless stdin is a fifo)
-w::
--width=::
Select the width of the SVG file (default: 1000)
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 46b4c24..a6374cd 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -30,7 +30,7 @@
#include <linux/bitmap.h>
-static char const *input_name = "perf.data";
+static const char *input_name;
static bool force, use_tui, use_stdio;
@@ -223,7 +223,7 @@ static int __cmd_annotate(void)
}
if (total_nr_samples == 0) {
- ui__warning("The %s file has no samples!\n", input_name);
+ ui__warning("The %s file has no samples!\n", session->filename);
goto out_delete;
}
out_delete:
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 4895668..5248046 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -18,7 +18,7 @@
#include <libelf.h>
-static char const *input_name = "perf.data";
+static const char *input_name;
static bool force;
static bool show_kernel;
static bool with_hits;
@@ -71,16 +71,24 @@ static int perf_session__list_build_ids(void)
{
struct perf_session *session;
+ elf_version(EV_CURRENT);
+
session = perf_session__new(input_name, O_RDONLY, force, false,
&build_id__mark_dso_hit_ops);
if (session == NULL)
return -1;
+ /*
+ * See if this is an ELF file first:
+ */
+ if (filename__fprintf_build_id(session->filename, stdout))
+ goto out;
+
if (with_hits)
perf_session__process_events(session, &build_id__mark_dso_hit_ops);
perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
-
+out:
perf_session__delete(session);
return 0;
}
@@ -90,13 +98,6 @@ static int __cmd_buildid_list(void)
if (show_kernel)
return sysfs__fprintf_build_id(stdout);
- elf_version(EV_CURRENT);
- /*
- * See if this is an ELF file first:
- */
- if (filename__fprintf_build_id(input_name, stdout))
- return 0;
-
return perf_session__list_build_ids();
}
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index 4c5e9e0..2676032 100644
--- a/tools/perf/builtin-evlist.c
+++ b/tools/perf/builtin-evlist.c
@@ -15,7 +15,7 @@
#include "util/parse-options.h"
#include "util/session.h"
-static char const *input_name = "perf.data";
+static const char *input_name;
static int __cmd_evlist(void)
{
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index 225e963..f2a1c33 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -18,7 +18,7 @@
struct alloc_stat;
typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
-static char const *input_name = "perf.data";
+static const char *input_name;
static int alloc_flag;
static int caller_flag;
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 899080a..c743b2a 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -325,7 +325,7 @@ alloc_failed:
die("memory allocation failed\n");
}
-static char const *input_name = "perf.data";
+static const char *input_name;
struct raw_event_sample {
u32 size;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 88ca2d4..19c2217 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -35,7 +35,7 @@
#include <linux/bitmap.h>
-static char const *input_name = "perf.data";
+static const char *input_name;
static bool force, use_tui, use_stdio;
static bool hide_unresolved;
@@ -327,7 +327,7 @@ static int __cmd_report(void)
}
if (nr_samples == 0) {
- ui__warning("The %s file has no samples!\n", input_name);
+ ui__warning("The %s file has no samples!\n", session->filename);
goto out_delete;
}
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 5177964..9816fa9 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -19,7 +19,7 @@
#include <pthread.h>
#include <math.h>
-static char const *input_name = "perf.data";
+static const char *input_name;
static char default_sort_order[] = "avg, max, switch, runtime";
static const char *sort_order = default_sort_order;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 82cca10..6d74933 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -433,7 +433,7 @@ static int cleanup_scripting(void)
return scripting_ops->stop_script();
}
-static char const *input_name = "perf.data";
+static const char *input_name;
static int process_sample_event(union perf_event *event,
struct perf_sample *sample,
@@ -1302,7 +1302,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
return -1;
}
- input = open(input_name, O_RDONLY);
+ input = open(session->filename, O_RDONLY); /* input_name */
if (input < 0) {
perror("failed to open file");
exit(-1);
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index aa26f4d..08e4fd0 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -36,8 +36,8 @@
#define PWR_EVENT_EXIT -1
-static char const *input_name = "perf.data";
-static char const *output_name = "output.svg";
+static const char *input_name;
+static const char *output_name = "output.svg";
static unsigned int numcpus;
static u64 min_freq; /* Lowest CPU frequency seen */
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 2ad9c10..fdd135d 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -132,8 +132,19 @@ struct perf_session *perf_session__new(const char *filename, int mode,
bool force, bool repipe,
struct perf_event_ops *ops)
{
- size_t len = filename ? strlen(filename) : 0;
- struct perf_session *self = zalloc(sizeof(*self) + len);
+ struct perf_session *self;
+ struct stat st;
+ size_t len;
+
+ if (!filename || !strlen(filename)) {
+ if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
+ filename = "-";
+ else
+ filename = "perf.data";
+ }
+
+ len = strlen(filename);
+ self = zalloc(sizeof(*self) + len);
if (self == NULL)
goto out;
--
1.7.7
--
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