kallsyms__parse() takes a callback that is called on every discovered
symbol. As /proc/kallsyms does not supply symbol sizes, the callback was
simply called with end=start, faking the symbol size to 1.
All of the callbacks (there are 2) used in calls to kallsyms__parse()
are _only_ used as callbacks for kallsyms__parse().
Given that kallsyms__parse() lacks real information about what
end/length should be, don't make up a length in kallsyms__parse().
Instead have the callbacks handle guessing the length.
Also relocate a comment regarding symbol creation to the callback which
does symbol creation (kallsyms__parse() is not in general used to create
symbols).
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Matt Hellsley <matthltc@us.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1344637382-22789-3-git-send-email-cody@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fix missing /etc/bash_completion.d directory creation, otherwise
the installation fails miserably on systems that don't have bash
completion installed yet or on specific target:
$ make DESTDIR=/tmp/junk-perf O=/tmp/pbuild -C tools/perf/ install
...
install -m 755 bash_completion /tmp/junk-perf/etc/bash_completion.d/perf
install: cannot create regular file
`/tmp/junk-perf/etc/bash_completion.d/perf': No such file or directory
make: *** [install] Error 1
make: Leaving directory `/opt/sw/ahern/perf.git/tools/perf'
Also use sysconfdir variable instead of the hardcoded /etc to handle
overriden conf directory.
Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1344522713-27951-4-git-send-email-fweisbec@gmail.com
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
If CONFIG options required for perf-lock are not enabled then the
corresponding tracepoints will not be enabled. Currently, the message to
the user is:
$ perf lock record -a -- sleep 1
invalid or unsupported event: 'lock:lock_acquire'
Run 'perf list' for a list of valid events
Improve the message with a suggestion on which CONFIG options are needed:
$ perf lock record -a -- sleep 1
tracepoint lock:lock_acquire is not enabled. Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1344530137-25521-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Currently only trace point events are supported in perf/python script,
the first 3 patches of this serie add the support for all types of
events. This script is just a simple sample to show how to gather the
basic information of the events and analyze them.
This script will create one object for each event sample and insert them
into a table in a database, then leverage the simple SQL commands to
sort/group them. User can modify or write their brand new functions
according to their specific requirment.
Here is the sample of how to use the script:
$ perf record -a tree
$ perf script -s process_event.py
There is 100 records in gen_events table
Statistics about the general events grouped by thread/symbol/dso:
comm number histgram
==========================================
swapper 56 ######
tree 20 #####
perf 10 ####
sshd 8 ####
kworker/7:2 4 ###
ksoftirqd/7 1 #
plugin-containe 1 #
symbol number histgram
==========================================================
native_write_msr_safe 40 ######
__lock_acquire 8 ####
ftrace_graph_caller 4 ###
prepare_ftrace_return 4 ###
intel_idle 3 ##
native_sched_clock 3 ##
Unknown_symbol 2 ##
do_softirq 2 ##
lock_release 2 ##
lock_release_holdtime 2 ##
trace_graph_entry 2 ##
_IO_putc 1 #
__d_lookup_rcu 1 #
__do_fault 1 #
__schedule 1 #
_raw_spin_lock 1 #
delay_tsc 1 #
generic_exec_single 1 #
generic_fillattr 1 #
dso number histgram
==================================================================
[kernel.kallsyms] 95 #######
/lib/libc-2.12.1.so 5 ###
Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1344419875-21665-6-git-send-email-feng.tang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This patch just follows Robert Richter's idea and the commit 37a058ea0
"perf script: Add generic perl handler to process events"
to similarly add a python handler for general events other than tracepoints.
For non-tracepoint events, this patch will try to find a function named
"process_event" in the python script, and pass the event attribute,
perf_sample, raw_data in format of raw string. And the python script can
use "struct" module's unpack function to disasemble the needed info and process.
Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1344419875-21665-2-git-send-email-feng.tang@intel.com
[ committer note: Fixed up wrt da37896, i.e. pevent parm in script event handlers ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
With the OUTPUT variable set the libtraceevent.a file is wrongly built
in the source directory:
+ make -d OUTPUT=/.../.build/perf-user/ DESTDIR=/.../.install/perf-user/
...
Considering target file `../lib/traceevent//libtraceevent.a'.
File `../lib/traceevent//libtraceevent.a' does not exist.
Finished prerequisites of target file `../lib/traceevent//libtraceevent.a'.
Must remake target `../lib/traceevent//libtraceevent.a'.
Invoking recipe from Makefile:837 to update target `../lib/traceevent//libtraceevent.a'.
Putting child 0x703850 (../lib/traceevent//libtraceevent.a) PID 8365 on the chain.
Live child 0x703850 (../lib/traceevent//libtraceevent.a) PID 8365
SUBDIR ../lib/traceevent/
$ git clean -nxd
Would remove tools/lib/traceevent/.event-parse.d
Would remove tools/lib/traceevent/.parse-filter.d
Would remove tools/lib/traceevent/.parse-utils.d
Would remove tools/lib/traceevent/.trace-seq.d
Would remove tools/lib/traceevent/event-parse.o
Would remove tools/lib/traceevent/libtraceevent.a
Would remove tools/lib/traceevent/parse-filter.o
Would remove tools/lib/traceevent/parse-utils.o
Would remove tools/lib/traceevent/trace-seq.o
This patch fixes this.
Note: Though this should already work with O=$outputdir we better use
the OUTPUT variable directly.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/1344361396-7237-3-git-send-email-robert.richter@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fixes the following:
+ make OUTPUT=/.../.build/perf-user/ DESTDIR=/.../.install/perf-user/ man install-man
make -C Documentation man
make[1]: Entering directory `/.../.source/linux.perf/tools/perf/Documentation'
make[2]: Entering directory `/.../.source/linux.perf/tools/perf'
make[2]: *** No rule to make target `PERF-VERSION-FILE'. Stop.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/1344361396-7237-2-git-send-email-robert.richter@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
We already lookup the associated event_format when reading the perf.data
header, so that we can cache the tracepoint name in evsel->name, so do
it a little further and save the event_format itself, so that we can
avoid relookups in tools that need to access it.
Change the tools to take the most obvious advantage, when they were
using pevent_find_event directly. More work is needed for further
removing the need of a pointer to pevent, such as when asking for event
field values ("common_pid" and the other common fields and per
event_format fields).
This is something that was planned but only got actually done when
Andrey Wagin needed to do this lookup at perf_tool->sample() time, when
we don't have access to pevent (session->pevent) to use with
pevent_find_event().
Cc: Andrey Wagin <avagin@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-txkvew2ckko0b594ae8fbnyk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Pull perf/core fixes and some late updates from Arnaldo Carvalho de Melo:
* Make clean brace expansion fix for some shells, from Palmer Cox
* Warn user just once per guest kernel when not finding kernel info,
from David Ahern
* perf test fix from Jiri Olsa
* Fix error handling on event creation in perf top, from David Ahern
* Fix check on perf_target__strnerror, from Namhyung Kim
* Save the whole cmdline, from David Ahern
* Prep work for the DWARF CFI post unwinder, so that it doesn't
uses perf_session in lots of places, just evlist/evsel is enough.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Only want to process directories under the guestmnount directory that
have a pid as a name (ie, all digits). Other entries in the guestmount
directory should be ignored. There is already a check that requires the
first character of each entry to be a digit, but atoi is used to convert
the directory name to a pid. For example if guestmount contains a
directory with the name 1foo, atoi converts it to a pid of 1 and a
machine is created with a pid of 1. This is wrong; this directory really
should be ignored. Use strtol to do that.
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1343616875-6455-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
A number of builtin commands process some user args and then pass the rest to
cmd_record. cmd_record then saves argc/argv that it receives into the header of
the perf data file. But this loses the arguments handled by the first command
-- ie., the real command line from the user. This patch saves the command line
as typed by the user rather than what was passed to cmd_record.
As an example consider the command:
$ perf kvm --guest --host --guestmount=/tmp/guest-mount record
-fo /tmp/perf.data -ag -- sleep 10
Currently the command saved to the header is:
cmdline : /tmp/p3.5/perf record -o perf.data.kvm -fo /tmp/perf.data -ag -- sleep 1
(ignore the duplicated -o -- the first would be yet another bug with perf-kvm).
With this patch the command line saved to the header is:
cmdline : /tmp/p3.5/perf kvm --guest --host --guestmount=/tmp/guest-mount
record -fo /tmp/perf.data -ag -- sleep 1
v2: simplified to saving the command in parse_options per Stephane's suggestion
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1343616831-6408-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
