28 Nov, 2011
1 commit
-
We don't need to have two PATH_MAX char sized arrays holding it, just
one in util/debugfs.c will do.Also rename debugfs_path to tracing_events_path, as it is not the path
to debugfs, that is debugfs_mountpoint. Both are now accessible.This will allow accessing this code in the perf python binding without
having to drag in perf.c and util/parse-events.c.The defaults for these variables are the canonical "/sys/kernel/debug"
and "/sys/kernel/debug/tracing/events/", removing the need for simple
tools to call debugfs_mount(NULL).Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-ug9jvtjrsqbluuhqqxpvg30f@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
13 Oct, 2011
1 commit
-
To do that we needed to stop using newtForm, as we don't want libnewt to
catch the xterm resize signal.Remove some more newt calls and instead use the underlying libslang
directly. In time tools/perf will use just libslang.Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-h1824yjiru5n2ivz4bseizwj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
15 Mar, 2011
1 commit
-
[root@emilia ~]# perf record -a -e sched:* -e timer:timer* sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.172 MB perf.data (~7530 samples) ]
[root@emilia ~]# perf evlist
sched:sched_kthread_stop
sched:sched_kthread_stop_ret
sched:sched_wakeup
sched:sched_wakeup_new
sched:sched_switch
sched:sched_migrate_task
sched:sched_process_free
sched:sched_process_exit
sched:sched_wait_task
sched:sched_process_wait
sched:sched_process_fork
sched:sched_stat_wait
sched:sched_stat_sleep
sched:sched_stat_iowait
sched:sched_stat_runtime
sched:sched_pi_setprio
timer:timer_init
timer:timer_start
timer:timer_expire_entry
timer:timer_expire_exit
timer:timer_cancel
[root@emilia ~]#Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Tom Zanussi
LKML-Reference:
Signed-off-by: Arnaldo Carvalho de Melo
11 Jan, 2011
1 commit
-
We need to defer calling perf_evsel_list__delete() till after atexit
registered routines, because we need to traverse the events being
recorded at that time at least on 'perf record'.This fixes the problem reported by Thomas Renninger where cmd_record
called by cmd_timechart would not write the tracing data to the perf.data
file header because the evsel_list at atexit (control+C on 'perf timechart
record') time would be empty, being already deleted by run_builtin(),
and thus 'perf timechart' when trying to process such perf.data file would
die with:"no trace data in the file"
Problem introduced in 70d544d.
Reported-by: Thomas Renninger
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Thomas Renninger
Cc: Tom Zanussi
LKML-Reference:
Signed-off-by: Arnaldo Carvalho de Melo
04 Jan, 2011
1 commit
-
Freeing all the possibly allocated resources, reducing complexity
on each tool exit path.Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Tom Zanussi
LKML-Reference:
Signed-off-by: Arnaldo Carvalho de Melo
17 Nov, 2010
1 commit
-
Free the perf trace name space and rename the trace to 'script' which is a
better match for the scripting engine.Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
05 Jun, 2010
1 commit
-
This patch adds the ability to specify an alternate directory to store the
buildid cache (buildids, copy of binaries). By default, it is hardcoded to
$HOME/.debug. This directory contains immutable data. The layout of the
directory is such that no conflicts in filenames are possible. A modification
in a file, yields a different buildid and thus a different location in the
subdir hierarchy.You may want to put the buildid cache elsewhere because of disk space
limitation or simply to share the cache between users. It is also useful for
remote collect vs. local analysis of profiles.This patch adds a new config option to the perfconfig file. Under the tag
'buildid', there is a dir option. For instance, if you have:$ cat /etc/perfconfig
[buildid]
dir = /var/cache/perf-buildidAll buildids and binaries are be saved in the directory specified. The perf
record, buildid-list, buildid-cache, report, annotate, and archive commands
will it to pull information out.The option can be set in the system-wide perfconfig file or in the
$HOME/.perfconfig file.Cc: David S. Miller
Cc: Frédéric Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Tom Zanussi
LKML-Reference:
Signed-off-by: Stephane Eranian
Signed-off-by: Arnaldo Carvalho de Melo
21 May, 2010
1 commit
-
Using the same scheme as for git's/perf's pager setup, i.e. if one
doesn't want to, on a newt enabled perf binary, to disable the TUI for
'perf report', its just a matter of doing:[root@doppio linux-2.6-tip]# printf "[tui]\n\nreport = off\n" >
/root/.perfconfig
[root@doppio linux-2.6-tip]# cat /root/.perfconfig
[tui]report = off
[root@doppio linux-2.6-tip]#System wide settings are also possible, by editing /etc/perfconfig, etc,
i.e. the git machinery for config files applies to perf as well, so when
in doubt where to put your settings, consult the git documentation, if
it fails, please let us know.Suggested-by: Ingo Molnar
Discussed-with: Stephane Eranian
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Tom Zanussi
LKML-Reference:
Signed-off-by: Arnaldo Carvalho de Melo
03 May, 2010
1 commit
-
Currently, perf 'live mode' writes build-ids at the end of the
session, which isn't actually useful for processing live mode events.What would be better would be to have the build-ids sent before any of
the samples that reference them, which can be done by processing the
event stream and retrieving the build-ids on the first hit. Doing
that in perf-record itself, however, is off-limits.This patch introduces perf-inject, which does the same job while
leaving perf-record untouched. Normal mode perf still records the
build-ids at the end of the session as it should, but for live mode,
perf-inject can be injected in between the record and report steps
e.g.:perf record -o - ./hackbench 10 | perf inject -v -b | perf report -v -i -
perf-inject reads a perf-record event stream and repipes it to stdout.
At any point the processing code can inject other events into the
event stream - in this case build-ids (-b option) are read and
injected as needed into the event stream.Build-ids are just the first user of perf-inject - potentially
anything that needs userspace processing to augment the trace stream
with additional information could make use of this facility.Cc: Ingo Molnar
Cc: Steven Rostedt
Cc: Frédéric Weisbecker
LKML-Reference:
Signed-off-by: Tom Zanussi
Signed-off-by: Arnaldo Carvalho de Melo
30 Apr, 2010
1 commit
-
First an example with the first internal test:
[acme@doppio linux-2.6-tip]$ perf test
1: vmlinux symtab matches kallsyms: OkSo it run just one test, that is "vmlinux symtab matches kallsyms", and it was
successful.If we run it in verbose mode, we'll see details about errors and extra warnings
for non-fatal problems:[acme@doppio linux-2.6-tip]$ perf test -v
1: vmlinux symtab matches kallsyms:
--- start ---
Looking at the vmlinux_path (5 entries long)
No build_id in vmlinux, ignoring it
No build_id in /boot/vmlinux, ignoring it
No build_id in /boot/vmlinux-2.6.34-rc4-tip+, ignoring it
Using /lib/modules/2.6.34-rc4-tip+/build/vmlinux for symbols
Maps only in vmlinux:
ffffffff81cb81b1-ffffffff81e1149b 0 [kernel].init.text
ffffffff81e1149c-ffffffff9fffffff 0 [kernel].exit.text
ffffffffff600000-ffffffffff6000ff 0 [kernel].vsyscall_0
ffffffffff600100-ffffffffff6003ff 0 [kernel].vsyscall_fn
ffffffffff600400-ffffffffff6007ff 0 [kernel].vsyscall_1
ffffffffff600800-ffffffffffffffff 0 [kernel].vsyscall_2
Maps in vmlinux with a different name in kallsyms:
ffffffffff600000-ffffffffff6000ff 0 [kernel].vsyscall_0 in kallsyms as [kernel].0
ffffffffff600100-ffffffffff6003ff 0 [kernel].vsyscall_fn in kallsyms as:
*ffffffffff600100-ffffffffff60012f 0 [kernel].2
ffffffffff600400-ffffffffff6007ff 0 [kernel].vsyscall_1 in kallsyms as [kernel].6
ffffffffff600800-ffffffffffffffff 0 [kernel].vsyscall_2 in kallsyms as [kernel].8
Maps only in kallsyms:
ffffffffff600130-ffffffffff6003ff 0 [kernel].4
---- end ----
vmlinux symtab matches kallsyms: Ok
[acme@doppio linux-2.6-tip]$In the above case we only know the name of the non contiguous kernel ranges in
the address space when reading the symbol information from the ELF symtab in
vmlinux.The /proc/kallsyms file lack this, we only notice they are separate because
there are modules after the kernel and after that more kernel functions, so we
need to have a module rbtree backed by the module .ko path to get symtabs in
the vmlinux case.The tool uses it to match by address to emit appropriate warning, but don't
considers this fatal.The .init.text and .exit.text ines, of course, aren't in kallsyms, so I left
these cases just as extra info in verbose mode.The end of the sections also aren't in kallsyms, so we the symbols layer does
another pass and sets the end addresses as the next map start minus one, which
sometimes pads, causing harmless mismatches.But at least the symbols match, tested it by copying /proc/kallsyms to
/tmp/kallsyms and doing changes to see if they were detected.This first test also should serve as a first stab at documenting the
symbol library by providing a self contained example that exercises it
together with comments about what is being done.More tests to check if actions done on a monitored app, like doing mmaps, etc,
makes the kernel generate the expected events should be added next.Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
LKML-Reference:
Signed-off-by: Arnaldo Carvalho de Melo
19 Apr, 2010
1 commit
-
Here is the patch of userspace perf tool.
Signed-off-by: Zhang Yanmin
Signed-off-by: Avi Kivity
03 Apr, 2010
1 commit
-
So that we avoid conflict with libc's string.h header.
Reviewed-by: KOSAKI Motohiro
Suggested-by: KOSAKI Motohiro
Cc: KOSAKI Motohiro
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
Signed-off-by: Arnaldo Carvalho de Melo
23 Mar, 2010
2 commits
-
Show an OK message box with the last message sent via pr_err,
etc.Reported-by: Ingo Molnar
Signed-off-by: Arnaldo Carvalho de Melo
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar -
Merge reason: Pick up latest perf fixes from upstream.
Signed-off-by: Ingo Molnar
13 Mar, 2010
1 commit
-
The use_browser needs to be in a file that is always built and
also we need a browser__show_help stub in that case.Reported-by: Anton Blanchard
Signed-off-by: Arnaldo Carvalho de Melo
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar
12 Mar, 2010
1 commit
-
Newt has widespread availability and provides a rather simple
API as can be seen by the size of this patch.The work needed to support it will benefit other frontends too.
In this initial patch it just checks if the output is a tty, if
not it falls back to the previous behaviour, also if
newt-devel/libnewt-dev is not installed the previous behaviour
is maintaned.Pressing enter on a symbol will annotate it, ESC in the
annotation window will return to the report symbol list.More work will be done to remove the special casing in
color_fprintf, stop using fmemopen/FILE in the printing of
hist_entries, etc.Also the annotation doesn't need to be done via spawning "perf
annotate" and then browsing its output, we can do better by
calling directly the builtin-annotate.c functions, that would
then be moved to tools/perf/util/annotate.c and shared with perf
top, etcBut lets go by baby steps, this patch already improves perf
usability by allowing to quickly do annotations on symbols from
the report screen and provides a first experimentation with
libnewt/TUI integration of tools.Tested on RHEL5 and Fedora12 X86_64 and on Debian PARISC64 to
browse a perf.data file collected on a Fedora12 x86_64 box.Signed-off-by: Arnaldo Carvalho de Melo
Cc: Avi Kivity
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar
08 Mar, 2010
1 commit
-
Conflicts:
Documentation/filesystems/proc.txt
arch/arm/mach-u300/include/mach/debug-macro.S
drivers/net/qlge/qlge_ethtool.c
drivers/net/qlge/qlge_main.c
drivers/net/typhoon.c
05 Feb, 2010
1 commit
-
This patch was generated by
git grep -E -i -l 'precidence' | xargs -r perl -p -i -e 's/precidence/precedence/'
Signed-off-by: Uwe Kleine-König
Signed-off-by: Jiri Kosina
31 Jan, 2010
1 commit
-
Adding new subcommand "perf lock" to perf.
I have a lot of remaining ToDos, but for now perf lock can
already provide minimal functionality for analyzing lock
statistics.Signed-off-by: Hitoshi Mitake
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
29 Jan, 2010
1 commit
-
Checked with:
./../scripts/checkpatch.pl --terse --file perf.cperf.c: 51: ERROR: open brace '{' following function declarations go on the next line
perf.c: 73: ERROR: "foo*** bar" should be "foo ***bar"
perf.c:112: ERROR: space prohibited before that close parenthesis ')'
perf.c:127: ERROR: space prohibited before that close parenthesis ')'
perf.c:171: ERROR: "foo** bar" should be "foo **bar"
perf.c:213: ERROR: "(foo*)" should be "(foo *)"
perf.c:216: ERROR: "(foo*)" should be "(foo *)"
perf.c:217: ERROR: space required before that '*' (ctx:OxV)
perf.c:452: ERROR: do not initialise statics to 0 or NULL
perf.c:453: ERROR: do not initialise statics to 0 or NULLSigned-off-by: Arnaldo Carvalho de Melo
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Frederic Weisbecker
Cc: Masami Hiramatsu
LKML-Reference:
Signed-off-by: Ingo Molnar
21 Jan, 2010
1 commit
-
For now it just has operations to examine a given file, find its
build-id and add or remove it to/from the cache.Useful, for instance, when adding binaries sent together with a
perf.data file, so that we can add them to the cache and have
the tools find it when resolving symbols.It'll also manage the size of the cache like 'ccache' does.
Signed-off-by: Arnaldo Carvalho de Melo
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
LKML-Reference:
Signed-off-by: Ingo Molnar
28 Dec, 2009
1 commit
-
Mount debugfs filesystem under '/sys/kernel/debug', if it's not
mounted.Signed-off-by: Xiao Guangrong
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Frederic Weisbecker
Cc: Clark Williams
Cc: John Kacur
LKML-Reference:
Signed-off-by: Ingo Molnar
15 Dec, 2009
1 commit
-
I guess it is enough to show some examples:
[root@doppio linux-2.6-tip]# rm -f perf.data*
[root@doppio linux-2.6-tip]# ls -la perf.data*
ls: cannot access perf.data*: No such file or directory
[root@doppio linux-2.6-tip]# perf record -f find / > /dev/null
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.062 MB perf.data (~2699 samples) ]
[root@doppio linux-2.6-tip]# ls -la perf.data*
-rw------- 1 root root 74440 2009-12-14 20:03 perf.data
[root@doppio linux-2.6-tip]# perf record -f find / > /dev/null
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.062 MB perf.data (~2692 samples) ]
[root@doppio linux-2.6-tip]# ls -la perf.data*
-rw------- 1 root root 74280 2009-12-14 20:03 perf.data
-rw------- 1 root root 74440 2009-12-14 20:03 perf.data.old
[root@doppio linux-2.6-tip]# perf diff | head -5
1 -34994580 /lib64/libc-2.10.1.so _IO_vfprintf_internal
2 -15307806 [kernel.kallsyms] __kmalloc
3 +1 +3665941 /lib64/libc-2.10.1.so __GI_memmove
4 +4 +23508995 /lib64/libc-2.10.1.so _int_malloc
5 +7 +38538813 [kernel.kallsyms] __d_lookup
[root@doppio linux-2.6-tip]# perf diff -p | head -5
1 +1.00% /lib64/libc-2.10.1.so _IO_vfprintf_internal
2 [kernel.kallsyms] __kmalloc
3 +1 /lib64/libc-2.10.1.so __GI_memmove
4 +4 /lib64/libc-2.10.1.so _int_malloc
5 +7 -1.00% [kernel.kallsyms] __d_lookup
[root@doppio linux-2.6-tip]# perf diff -v | head -5
1 361449551 326454971 -34994580 /lib64/libc-2.10.1.so _IO_vfprintf_internal
2 151009241 135701435 -15307806 [kernel.kallsyms] __kmalloc
3 +1 101805328 105471269 +3665941 /lib64/libc-2.10.1.so __GI_memmove
4 +4 78041440 101550435 +23508995 /lib64/libc-2.10.1.so _int_malloc
5 +7 59536172 98074985 +38538813 [kernel.kallsyms] __d_lookup
[root@doppio linux-2.6-tip]# perf diff -vp | head -5
1 9.00% 8.00% +1.00% /lib64/libc-2.10.1.so _IO_vfprintf_internal
2 3.00% 3.00% [kernel.kallsyms] __kmalloc
3 +1 2.00% 2.00% /lib64/libc-2.10.1.so __GI_memmove
4 +4 2.00% 2.00% /lib64/libc-2.10.1.so _int_malloc
5 +7 1.00% 2.00% -1.00% [kernel.kallsyms] __d_lookup
[root@doppio linux-2.6-tip]#This should be enough for diffs where the system is non
volatile, i.e. when one doesn't updates binaries.For volatile environments, stay tuned for the next perf tool
feature: a buildid cache populated by 'perf record', managed by
'perf buildid-cache' a-la ccache, and used by all the report
tools.Signed-off-by: Arnaldo Carvalho de Melo
Cc: "Paul E. McKenney"
Cc: Stephen Hemminger
Cc: Frédéric Weisbecker
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Paul Mackerras
Cc: Paul E. McKenney
LKML-Reference:
Signed-off-by: Ingo Molnar
20 Nov, 2009
1 commit
-
This tool is mostly a perf version of kmemtrace-user.
The following information is provided by this tool:
- the total amount of memory allocated and fragmentation per
call-site- the total amount of memory allocated and fragmentation per
allocation- total memory allocated and fragmentation in the collected
dataset - ...Sample output:
# ./perf kmem record
^C
# ./perf kmem --stat caller --stat alloc -l 10------------------------------------------------------------------------------
Callsite | Total_alloc/Per | Total_req/Per | Hit | Fragmentation
------------------------------------------------------------------------------
0xc052f37a | 790528/4096 | 790528/4096 | 193 | 0.000%
0xc0541d70 | 524288/4096 | 524288/4096 | 128 | 0.000%
0xc051cc68 | 481600/200 | 481600/200 | 2408 | 0.000%
0xc0572623 | 297444/676 | 297440/676 | 440 | 0.001%
0xc05399f1 | 73476/164 | 73472/164 | 448 | 0.005%
0xc05243bf | 51456/256 | 51456/256 | 201 | 0.000%
0xc0730d0e | 31844/497 | 31808/497 | 64 | 0.113%
0xc0734c4e | 17152/256 | 17152/256 | 67 | 0.000%
0xc0541a6d | 16384/128 | 16384/128 | 128 | 0.000%
0xc059c217 | 13120/40 | 13120/40 | 328 | 0.000%
0xc0501ee6 | 11264/88 | 11264/88 | 128 | 0.000%
0xc04daef0 | 7504/682 | 7128/648 | 11 | 5.011%
0xc04e14a3 | 4216/191 | 4216/191 | 22 | 0.000%
0xc05041ca | 3524/44 | 3520/44 | 80 | 0.114%
0xc0734fa3 | 2104/701 | 1620/540 | 3 | 23.004%
0xc05ec9f1 | 2024/289 | 2016/288 | 7 | 0.395%
0xc06a1999 | 1792/256 | 1792/256 | 7 | 0.000%
0xc0463b9a | 1584/144 | 1584/144 | 11 | 0.000%
0xc0541eb0 | 1024/16 | 1024/16 | 64 | 0.000%
0xc06a19ac | 896/128 | 896/128 | 7 | 0.000%
0xc05721c0 | 772/12 | 768/12 | 64 | 0.518%
0xc054d1e6 | 288/57 | 280/56 | 5 | 2.778%
0xc04b562e | 157/31 | 154/30 | 5 | 1.911%
0xc04b536f | 80/16 | 80/16 | 5 | 0.000%
0xc05855a0 | 64/64 | 36/36 | 1 | 43.750%
------------------------------------------------------------------------------------------------------------------------------------------------------------
Alloc Ptr | Total_alloc/Per | Total_req/Per | Hit | Fragmentation
------------------------------------------------------------------------------
0xda884000 | 1052672/4096 | 1052672/4096 | 257 | 0.000%
0xda886000 | 262144/4096 | 262144/4096 | 64 | 0.000%
0xf60c7c00 | 16512/128 | 16512/128 | 129 | 0.000%
0xf59a4118 | 13120/40 | 13120/40 | 328 | 0.000%
0xdfd4b2c0 | 11264/88 | 11264/88 | 128 | 0.000%
0xf5274600 | 7680/256 | 7680/256 | 30 | 0.000%
0xe8395000 | 5948/594 | 5464/546 | 10 | 8.137%
0xe59c3c00 | 5748/479 | 5712/476 | 12 | 0.626%
0xf4cd1a80 | 3524/44 | 3520/44 | 80 | 0.114%
0xe5bd1600 | 2892/482 | 2856/476 | 6 | 1.245%
... | ... | ... | ... | ...
------------------------------------------------------------------------------SUMMARY
=======
Total bytes requested: 2333626
Total bytes allocated: 2353712
Total bytes wasted on internal fragmentation: 20086
Internal fragmentation: 0.853375%TODO:
- show sym+offset in 'callsite' column
- show cross node allocation stats
- collect more useful stats?
- ...Signed-off-by: Li Zefan
Acked-by: Pekka Enberg
Acked-by: Peter Zijlstra
Cc: Frederic Weisbecker
Cc: Steven Rostedt
Cc: Eduard - Gabriel Munteanu
Cc: linux-mm@kvack.org
LKML-Reference:
Signed-off-by: Ingo Molnar
17 Nov, 2009
2 commits
-
Resolved merge conflict in tools/perf/Makefile
Merge reason: we want to queue up a dependent patch.
Signed-off-by: Ingo Molnar
-
With this we can list the buildids in a perf.data file so that
we can pipe them to other, distro specific tools that from the
buildids can figure out separate packages (foo-debuginfo) where
we can find the matching symtabs so that perf report can do its
job.E.g:
[acme@doppio linux-2.6-tip]$ perf buildid-list | head -5
8e08b117e5458ad3f85da16d42d0fc5cd21c5869
520c2387a587cc5acfcf881e27dba1caaeab4b1f
ec8dd400904ddfcac8b1c343263a790f977159dc
7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f
379bb828fd08859dbea73279f04abefabc95a6a3
[acme@doppio linux-2.6-tip]$ perf buildid-list -v | head -5
8e08b117e5458ad3f85da16d42d0fc5cd21c5869 /sbin/init
520c2387a587cc5acfcf881e27dba1caaeab4b1f /lib64/ld-2.10.1.so
ec8dd400904ddfcac8b1c343263a790f977159dc /lib64/libc-2.10.1.so
7caedbca5a6d8ab39a7fe44bd28c07d3e14a3f3f /sbin/udevd
379bb828fd08859dbea73279f04abefabc95a6a3 /lib64/libdl-2.10.1.so
[acme@doppio linux-2.6-tip]$Signed-off-by: Arnaldo Carvalho de Melo
Cc: Frederic Weisbecker
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar
15 Nov, 2009
1 commit
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Merge reason: Both 'perf bench' and the pending PowerPC changes
are now ready for the next merge window.Signed-off-by: Ingo Molnar
09 Nov, 2009
1 commit
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modify perf.c get_debugfs_mntpnt() to use the util/debugfs.c
debugfs_find_mountpoint()modify util/parse-events.c to use debugfs_valid_mountpoint().
Signed-off-by: Clark Williams
Cc: Arnaldo Carvalho de Melo
Cc: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar
08 Nov, 2009
1 commit
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This patch modifies perf.c for invoking 'bench' subcommand.
Signed-off-by: Hitoshi Mitake
Cc: Rusty Russell
Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Arnaldo Carvalho de Melo
Cc: fweisbec@gmail.com
Cc: Jiri Kosina
LKML-Reference:
Signed-off-by: Ingo Molnar
23 Oct, 2009
1 commit
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Conflicts:
tools/perf/MakefileMerge reason:
- fix the conflict
- pick up the pr_*() infrastructure to queue up dependent patchSigned-off-by: Ingo Molnar
13 Oct, 2009
3 commits
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Use strlen & macros instead of manually counting string lengths as
this is error prone and may lend to bugs.Signed-off-by: Vincent Legoll
Cc: Linus Torvalds
LKML-Reference:
Signed-off-by: Ingo Molnar -
Enables 'perf probe' even if libdwarf is not installed. If libdwarf is
not found, 'perf probe' just disables dwarf support. Users can use
'perf probe' to set up new events by using kprobe_events format.Signed-off-by: Masami Hiramatsu
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Arnaldo Carvalho de Melo
Cc: Steven Rostedt
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Christoph Hellwig
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Frank Ch. Eigler
LKML-Reference:
Signed-off-by: Frederic Weisbecker -
Add perf probe subcommand that implements a kprobe-event setup helper
to the perf command.
This allows user to define kprobe events using C expressions (C line
numbers, C function names, and C local variables).Usage
-----
perf probe [] -P 'PROBEDEF' [-P 'PROBEDEF' ...]-k, --vmlinux vmlinux/module pathname
-P, --probe
probe point definition, where
p: kprobe probe
r: kretprobe probe
GRP: Group name (optional)
NAME: Event name
FUNC: Function name
OFFS: Offset from function entry (in byte)
SRC: Source code path
LINE: Line number
ARG: Probe argument (local variable name or
kprobe-tracer argument format is supported.)Changes in v4:
- Add _GNU_SOURCE macro for strndup().Changes in v3:
- Remove -r option because perf always be used for online kernel.
- Check malloc/calloc results.Changes in v2:
- Check synthesized string length.
- Rename perf kprobe to perf probe.
- Use spaces for separator and update usage comment.
- Check error paths in parse_probepoint().
- Check optimized-out variables.Signed-off-by: Masami Hiramatsu
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Arnaldo Carvalho de Melo
Cc: Steven Rostedt
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Christoph Hellwig
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Frank Ch. Eigler
LKML-Reference:
Signed-off-by: Frederic Weisbecker
19 Sep, 2009
1 commit
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timechart is a tool to visualize what is going on in the system.
The user makes a trace of what is going on with
> perf record --timechart /usr/bin/some_command
and then can turn the output of this into an svg file
> perf timechart
which then can be viewed with any SVG view; inkscape works well
enough for me.The idea behind timechart is to create a "infinitely zoomable"
picture; something that has high level information on a 1:1 zoom
level, but which exposes more details every time you zoom into a
specific area.Signed-off-by: Arjan van de Ven
Acked-by: Peter Zijlstra
Cc: Paul Mackerras
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
13 Sep, 2009
1 commit
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This turn-key tool allows scheduler measurements to be
conducted and the results be displayed numerically.First baby step towards that goal: clone the new command off of
perf trace.Fix a few other details along the way:
- add (minimal) perf trace documentation
- reorder a few places
- list perf trace in the mainporcelain list as well
as it's a very useful utility.Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Arnaldo Carvalho de Melo
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
17 Aug, 2009
1 commit
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This adds perf trace into the set of perf tools.
It is written to fetch the tracepoint samples from perf events
and display them, according to the events information given by
the debugfs files through the util/trace* tools.It is a rough first shot and doesn't yet handle the cpu,
timestamps fields and some other things.Example:
perf record -f -e workqueue:workqueue_execution:record -F 1 -a
perf tracekblockd/0-236 [000] 0.000000: workqueue_execution: thread=:236 func=cfq_kick_queue+0x0
kondemand/0-360 [000] 0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
kondemand/0-360 [000] 0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
kondemand/1-361 [000] 0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0Todo:
- A lot of things!
Signed-off-by: Frederic Weisbecker
Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Mike Galbraith
Cc: "Luis Claudio R. Goncalves"
Cc: Clark Williams
Cc: Jon Masters
Cc: Mathieu Desnoyers
Cc: Christoph Hellwig
Cc: Xiao Guangrong
Cc: Zhaolei
Cc: Li Zefan
Cc: Lai Jiangshan
Cc: Masami Hiramatsu
Cc: Tom Zanussi
Cc: "Frank Ch. Eigler"
Cc: Roland McGrath
Cc: Jason Baron
Cc: Paul Mackerras
Cc: Jiaying Zhang
Cc: Anton Blanchard
LKML-Reference:
Signed-off-by: Ingo Molnar
23 Jul, 2009
1 commit
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If "/sys/kernel/debug" is not a debugfs mount point, search for the debugfs
filesystem in /proc/mounts, but also allows the user to specify
'--debugfs-dir=blah' or set the environment variable: 'PERF_DEBUGFS_DIR'Signed-off-by: Jason Baron
[ also made it probe "/debug" by default ]
Signed-off-by: Peter Zijlstra
LKML-Reference:
01 Jul, 2009
1 commit
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Enable -Wextra. This found a few real bugs plus a number
of signed/unsigned type mismatches/uncleanlinesses. It
also required a few annotationsAll things considered it was still worth it so lets try with
this enabled for now.Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Arnaldo Carvalho de Melo
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
07 Jun, 2009
1 commit
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Several people have suggested that 'perf' has become a full-fledged
tool that should be moved out of Documentation/. Move it to the
(new) tools/ directory.Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Paul Mackerras
Cc: Arnaldo Carvalho de Melo
LKML-Reference:
Signed-off-by: Ingo Molnar