- 03 Nov, 2014 1 commit
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Adrian Hunter authored
Add a thread stack for synthesizing call chains from call and return events. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Acked-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1414678188-14946-2-git-send-email-adrian.hunter@intel.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 30 Oct, 2014 2 commits
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements from Arnaldo Carvalho de Melo: User visible changes: - Don't open the DWARF info multiple times, keeping instead a dwfl handle in struct dso, greatly speeding up 'perf report' on powerpc. (Sukadev Bhattiprolu) - Introduce PARSE_OPT_DISABLED option flag and use it to avoid showing undersired options in tools that provides frontends to 'perf record', like sched, kvm, etc (Namhyung Kim) Infrastructure changes: - More Intel PT work, including a facility to export sample data (comms, threads, symbol names, etc) in a database friendly way, with an script to use this to create a postgresql database. (Adrian Hunter) - Use make sure that thread->mg->machine points to the machine where the thread exists (it was being set only for the kmaps kernel modules case, do it as well for the mmaps) and use it to shorten function signatures (Arnaldo Carvalho de Melo) Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - Fix report -F (abort, in_tx, mispredict, etc) segfaults for sample.data files without branch info (Jiri Olsa) - Add patch that should have went in a previous patchkit to use global cache provided by libunwind (Namhyung Kim) - Make CPUINFO_PROC an array to support different kernels, problem detected when the information reported via /proc/cpuinfo changed on ARM (Wang Nan) - 'perf probe' --demangle typo fix and a new --quiet option (Masami Hiramatsu) Signed-off-by:
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- 29 Oct, 2014 36 commits
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Adrian Hunter authored
Add a function to deliver synthesized events from within a session. Intel PT decoding works by synthesizing events (primarily branch events) that can then be consumed by existing tools. This function will be used to deliver those events. Signed-off-by:
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Arnaldo Carvalho de Melo authored
Where direct use of the longer form using list_for_entry() was being used. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-v4fw80flg25nkl8jgeod3ot9@git.kernel.orgSigned-off-by:
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Adrian Hunter authored
Add an index of the event identifiers, in preparation for Intel PT. The event id (also called the sample id) is a unique number allocated by the kernel to the event created by perf_event_open(). Events can include the event id by having a sample type including PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER. Currently the main use of the event id is to match an event back to the evsel to which it belongs i.e. perf_evlist__id2evsel() The purpose of this patch is to make it possible to match an event back to the mmap from which it was read. The reason that is useful is because the mmap represents a time-ordered context (either for a cpu or for a thread). Intel PT decodes trace information on that basis. In full-trace mode, that information can be recorded when the Intel PT trace is read, but in sample-mode the Intel PT trace data is embedded in a sample and it is in that case that the "id index" is needed. So the mmaps are numbered (idx) and the cpu and tid recorded against the id by perf_evlist__set_sid_idx() which is called by perf_evlist__mmap_per_evsel(). That information is recorded on the perf.data file in the new "id index". idx, cpu and tid are added to struct perf_sample_id (which is the node of evlist's hash table to match ids to evsels). The information can be retrieved using perf_evlist__id2sid(). Note however this all depends on having a sample type including PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER, otherwise ids are not recorded. The "id index" is a synthesized event record which will be created when Intel PT sampling is used by calling perf_event__synthesize_id_index(). Signed-off-by:
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Masami Hiramatsu authored
Add --quiet(-q) option to suppress output result message for --add, and --del options (Note that --lines/funcs/vars are not affected). This option is useful if you run the perf probe inside your scripts. Signed-off-by:
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20141027203131.21219.35170.stgit@localhost.localdomainSigned-off-by:
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Adrian Hunter authored
Add a Python script to export to a postgresql database. The script requires the Python pyside module and the Qt PostgreSQL driver. The packages needed are probably named "python-pyside" and "libqt4-sql-psql" The caller of the script must be able to create postgresql databases. The script takes the database name as a parameter. The database and database tables are created. Data is written to flat files which are then imported using SQL COPY FROM. Example: $ perf record ls ... $ perf script report export-to-postgresql lsdb 2014-02-14 10:55:38.631431 Creating database... 2014-02-14 10:55:39.291958 Writing to intermediate files... 2014-02-14 10:55:39.350280 Copying to database... 2014-02-14 10:55:39.358536 Removing intermediate files... 2014-02-14 10:55:39.358665 Adding primary keys 2014-02-14 10:55:39.658697 Adding foreign keys 2014-02-14 10:55:39.667412 Done $ psql lsdb lsdb-# \d List of relations Schema | Name | Type | Owner --------+-----------------+-------+------- public | comm_threads | table | acme public | comms | table | acme public | dsos | table | acme public | machines | table | acme public | samples | table | acme public | samples_view | view | acme public | selected_events | table | acme public | symbols | table | acme public | threads | table | acme (9 rows) lsdb-# \d samples Table "public.samples" Column | Type | Modifiers ---------------+---------+----------- id | bigint | not null evsel_id | bigint | machine_id | bigint | thread_id | bigint | comm_id | bigint | dso_id | bigint | symbol_id | bigint | sym_offset | bigint | ip | bigint | time | bigint | cpu | integer | to_dso_id | bigint | to_symbol_id | bigint | to_sym_offset | bigint | to_ip | bigint | period | bigint | weight | bigint | transaction | bigint | data_src | bigint | Indexes: "samples_pkey" PRIMARY KEY, btree (id) Foreign-key constraints: "commfk" FOREIGN KEY (comm_id) REFERENCES comms(id) "dsofk" FOREIGN KEY (dso_id) REFERENCES dsos(id) "evselfk" FOREIGN KEY (evsel_id) REFERENCES selected_events(id) "machinefk" FOREIGN KEY (machine_id) REFERENCES machines(id) "symbolfk" FOREIGN KEY (symbol_id) REFERENCES symbols(id) "threadfk" FOREIGN KEY (thread_id) REFERENCES threads(id) "todsofk" FOREIGN KEY (to_dso_id) REFERENCES dsos(id) "tosymbolfk" FOREIGN KEY (to_symbol_id) REFERENCES symbols(id) lsdb-# \d samples_view View "public.samples_view" Column | Type | Modifiers -------------------+-------------------------+----------- id | bigint | time | bigint | cpu | integer | pid | integer | tid | integer | command | character varying(16) | event | character varying(80) | ip_hex | text | symbol | character varying(2048) | sym_offset | bigint | dso_short_name | character varying(256) | to_ip_hex | text | to_symbol | character varying(2048) | to_sym_offset | bigint | to_dso_short_name | character varying(256) | lsdb=# select * from samples_view; id| time |cpu | pid | tid |command| event | ip_hex | symbol |sym_off| dso_name|to_ip_hex|to_symbol|to_sym_off|to_dso_name --+------------+----+------+------+-------+--------+---------------+---------------------+-------+---------+---------+---------+----------+---------- 1 |12202825015 | -1 | 7339 | 7339 |:17339 | cycles | fffff8104d24a |native_write_msr_safe| 10 | [kernel]| 0 | unknown | 0| unknown 2 |12203258804 | -1 | 7339 | 7339 |:17339 | cycles | fffff8104d24a |native_write_msr_safe| 10 | [kernel]| 0 | unknown | 0| unknown 3 |12203988119 | -1 | 7339 | 7339 |:17339 | cycles | fffff8104d24a |native_write_msr_safe| 10 | [kernel]| 0 | unknown | 0| unknown My notes (which may be out-of-date) on setting up postgresql so you can create databases: fedora: $ sudo yum install postgresql postgresql-server python-pyside qt-postgresql $ sudo su - postgres -c initdb $ sudo service postgresql start $ sudo su - postgres $ createuser -s <your username> I used the the unix user name in createuser. If it fails, try createuser without -s and answer the following question to allow your user to create tables: Shall the new role be a superuser? (y/n) y ubuntu: $ sudo apt-get install postgresql $ sudo su - postgres $ createuser <your username> Shall the new role be a superuser? (y/n) y You may want to disable automatic startup. One way is to edit /etc/postgresql/9.3/main/start.conf. Another is to disable the init script e.g. sudo update-rc.d postgresql disable Signed-off-by: -
Adrian Hunter authored
Use the new db_export facility to export data in a database-friendly way. A Python script selects the db_export mode by setting a global variable 'perf_db_export_mode' to True. The script then optionally implements functions to receive table rows. The functions are: evsel_table machine_table thread_table comm_table dso_table symbol_table sample_table An example script is provided in a subsequent patch. Signed-off-by:
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Adrian Hunter authored
This patch introduces an abstraction for exporting sample data in a database-friendly way. The abstraction does not implement the actual output. A subsequent patch takes this facility into use for extending the script interface. The abstraction is needed because static data like symbols, dsos, comms etc need to be exported only once. That means allocating them a unique identifier and recording it on each structure. The member 'db_id' is used for that. 'db_id' is just a 64-bit sequence number. Exporting centres around the db_export__sample() function which exports the associated data structures if they have not yet been allocated a db_id. Signed-off-by:
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Arnaldo Carvalho de Melo authored
It was silently returning or printing "(null)" when no memory was available at various points. Fix it by checking and warning the user when that happens. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-835udmf66x9nza504cu6irz9@git.kernel.orgSigned-off-by:
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Adrian Hunter authored
popen() causes an error message to print if perf-read-vdso32 does not run. Avoid that by not trying to run it if it was not built. Ditto perf-read-vdsox32. Signed-off-by:
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Adrian Hunter authored
'perf record' post-processes the event stream to create a list of build-ids for object files for which sample events have been recorded. That results in those object files being recorded in the build-id cache. In the case of VDSO, perf tools reads it from memory and copies it into a temporary file, which as decribed above, gets added to the build-id cache. Then when the perf.data file is processed by other tools, the build-id of VDSO is listed in the perf.data file and the VDSO can be read from the build-id cache. In that case the name of the map, the short name of the DSO, and the entry in the build-id cache are all "[vdso]". However, in the 64-bit case, there also can be 32-bit compatibility VDSOs. A previous patch added programs "perf-read-vdso32" and "perf read-vdsox32". This patch uses those programs to read the correct VDSO for a thread and create a temporary file just as for the 64-bit VDSO. The map name and the entry in the build-id cache are still "[vdso]" but the DSO short name becomes "[vdso32]" and "[vdsox32]" respectively. Signed-off-by:
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Adrian Hunter authored
perf tools copy VDSO out of memory. However, on 64-bit machines there may be 32-bit compatibility VDOs also. To copy those requires separate 32-bit executables. This patch adds to the build additional programs perf-read-vdso32 and perf-read-vdsox32 for 32-bit and x32 respectively. Signed-off-by:
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Adrian Hunter authored
perf list only lists PMUs with events. Add a flag to cause a PMU to be also listed separately. Signed-off-by:
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Wang Nan authored
When 'perf record' write headers, it calls write_xxx in tools/perf/util/header.c, and check return value. It rolls back all working only when return value is negative. This patch ensures write_cpudesc() and write_total_mem() return negative number when error. Without this patch, headers reported by 'perf report' header is error in some platform. Following output is caputured on ARM, which doesn't contain "Processor" field in /proc/cpuinfo. See "cpudesc", "total memory" and "cmdline" field. bash-4.2# perf record ls ... [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.001 MB perf.data (~36 samples) ] bash-4.2# perf report --stdio --header Error: The perf.data file has no samples! # ======== # captured on: Fri Sep 12 10:09:10 2014 # hostname : arma15el # os release : 3.17.0+ # perf version : 3.10.53 # arch : armv7l # nrcpus online : 4 # nrcpus avail : 1 # cpudesc : (null) # total memory : 0 kB # cmdline : # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, excl_host = 0, excl_guest = 1, precise_ip = 0 # pmu mappings: not available # ======== # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Waiman Long <Waiman.Long@hp.com> Link: http://lkml.kernel.org/r/1413428909-80017-1-git-send-email-wangnan0@huawei.comSigned-off-by:
Wang Nan <wangnan0@huawei.com> Signed-off-by:
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Namhyung Kim authored
The perf probe command has some exclusive options. Use new PARSE_OPT_EXCLUSIVE flag to simplify the code and show more compact usage. $ perf probe -l -a foo Error: switch `a' cannot be used with switch `l' usage: perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...] or: perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...] or: perf probe [<options>] --del '[GROUP:]EVENT' ... or: perf probe --list or: perf probe [<options>] --line 'LINEDESC' or: perf probe [<options>] --vars 'PROBEPOINT' -a, --add <[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT [[NAME=]ARG ...]> probe point definition, where GROUP: Group name (optional) EVENT: Event name FUNC: Function name OFF: Offset from function entry (in byte) %return: Put the probe at function return SRC: Source code path RL: Relative line number from function entry. AL: Absolute line number in file. PT: Lazy expression of line code. ARG: Probe argument (local variable name or kprobe-tracer argument format.) -l, --list list up current probe events Signed-off-by:Namhyung Kim <namhyung@kernel.org> Acked-by:
Hemant Kumar <hemant@linux.vnet.ibm.com> Acked-by:
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Namhyung Kim authored
Some options cannot be used at the same time. To handle such options add a new PARSE_OPT_EXCLUSIVE flag and show error message if more than one of them is used. Signed-off-by:
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Namhyung Kim authored
The 'perf kvm stat record' tool is an alias of 'perf record' with predefined kvm related options. All options that passed to 'perf kvm stat record' are processed by the 'perf record' tool. So, 'perf kvm stat record --help' prints help of usage for the 'perf record' command. There are a few options useful for 'perf kvm stat record', the rest either break kvm related output or don't change it. Let's print safe for 'perf kvm stat record' options in addition to general 'perf record' --help output. With this patch, new output looks like below: $ perf kvm stat record -h usage: perf kvm stat record [<options>] -p, --pid <pid> record events on existing process id -t, --tid <tid> record events on existing thread id -r, --realtime <n> collect data with this RT SCHED_FIFO priority --no-buffering collect data without buffering -a, --all-cpus system-wide collection from all CPUs -C, --cpu <cpu> list of cpus to monitor -c, --count <n> event period to sample -o, --output <file> output file name -i, --no-inherit child tasks do not inherit counters -m, --mmap-pages <pages> number of mmap data pages -v, --verbose be more verbose (show counter open errors, etc) -q, --quiet don't print any message -s, --stat per thread counts -D, --delay <n> ms to wait before starting measurement after program start -u, --uid <user> user to profile --per-thread use per-thread mmaps $ perf kvm stat record -n sleep 1 Error: switch `n' is not usable usage: perf kvm stat record [<options>] Signed-off-by: -
Namhyung Kim authored
Those are shared with other builtin commands like kvm, script. So make it accessable from them. This is a preparation of later change that limiting possible options. Signed-off-by:
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Namhyung Kim authored
In some cases, we need to reuse exising options with some of them disabled. To do that, add PARSE_OPT_DISABLED flag and set_option_flag() function. Signed-off-by:
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Arnaldo Carvalho de Melo authored
Instead of passing both thread and machine. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-y2nl2v7p7of0dzuyc3tppxoo@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
The 'machine' parameter is used in this function, ditch the __maybe_unused annotation, not needed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-dme1nsu07a0spkmcl401srec@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
The unwind__get_entries() already receives the thread parameter, from where it can obtain the matching machine structure, shorten the signature. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-isjc6bm8mv4612mhi6af64go@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Shortening function signature lenght too, since a thread's machine can be obtained from thread->mg->machine, no need to pass thread, machine. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-5wb6css280ty0cel5p0zo2b1@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
So stop passing both machine and thread to several thread methods, reducing function signature length. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ckcy19dcp1jfkmdihdjcqdn1@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
We were setting this only in machine__init(), i.e. for the map_groups that holds the kernel module maps, not for the one used for a thread's executable mmaps. Now we are sure that we can obtain the machine where a thread is by going via thread->mg->machine, thus we can, in the following patch, make all codepaths that receive machine _and_ thread, drop the machine one. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-y6zgaqsvhrf04v57u15e4ybm@git.kernel.orgSigned-off-by:
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Sukadev Bhattiprolu authored
Cache the DWARF debug info for DSO so we don't have to rebuild it for each address in the DSO. Note that dso__new() uses calloc() so don't need to set dso->dwfl to NULL. $ /tmp/perf.orig --version perf version 3.18.rc1.gc2661b80 $ /tmp/perf.new --version perf version 3.18.rc1.g402d62 $ perf stat -e cycles,instructions /tmp/perf.orig report -g > orig Performance counter stats for '/tmp/perf.orig report -g': 6,428,177,183 cycles # 0.000 GHz 4,176,288,391 instructions # 0.65 insns per cycle 1.840666132 seconds time elapsed $ perf stat -e cycles,instructions /tmp/perf.new report -g > new Performance counter stats for '/tmp/perf.new report -g': 305,773,142 cycles # 0.000 GHz 276,048,272 instructions # 0.90 insns per cycle 0.087693543 seconds time elapsed $ diff orig new $ Changelog[v2]: [Arnaldo Carvalho] Cache in existing global objects rather than create new static/globals in functions. Reported-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Anton Blanchard <anton@au1.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/20141022000958.GB2228@us.ibm.comSigned-off-by:
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Masami Hiramatsu authored
Replace "Disable" with "Enable", since --demangle option enables symbol demangling, not disable it. perf probe has --demangle and --no-demangle options, but the command-line help (--help) shows only --demangle option. So it should explain about --demangle. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F dso_from perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F dso_to perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F symbol_from perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F symbol_to perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F mispredict perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F in_tx perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Jiri Olsa authored
The branch field sorting code assumes hist_entry::branch_info is allocated, which is wrong and following perf session ends up with report segfault. $ perf record ls $ perf report -F abort perf: Segmentation fault Checking that hist_entry::branch_info is valid and display "N/A" string in snprint callback if it's not. Signed-off-by:
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Wang Nan authored
After kernel 3.7 (commit b4b8f770), /proc/cpuinfo replaces 'Processor' to 'model name'. This patch makes CPUINFO_PROC to an array and provides two choices for ARM, makes it compatible for different kernel version. v1 -> v2: minor changes as suggested by Namhyung Kim: - Doesn't pass @h and @evlist to __write_cpudesc; - Coding style fix. v2 -> v3: - Rebase: git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/core Signed-off-by:
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Namhyung Kim authored
The libunwind provides two caching policy which are global and per-thread. As perf unwinds callchains in a single thread, it'd sufficient to use global caching. This speeds up my perf report from 14s to 7s on a ~260MB data file. Although the output sometimes contains a slight difference (~0.01% in terms of number of lines printed) on callchains which were not resolved. Signed-off-by:
Jean Pihet <jean.pihet@linaro.org> Cc: Arun Sharma <asharma@fb.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1412556363-26229-4-git-send-email-namhyung@kernel.orgSigned-off-by:
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Ingo Molnar authored
These patches: 86a349a2 ("perf/x86/intel: Add Broadwell core support") c46e665f ("perf/x86: Add INST_RETIRED.ALL workarounds") fdda3c4a ("perf/x86/intel: Use Broadwell cache event list for Haswell") introduced magic constants and unexplained changes: https://lkml.org/lkml/2014/10/28/1128 https://lkml.org/lkml/2014/10/27/325 https://lkml.org/lkml/2014/8/27/546 https://lkml.org/lkml/2014/10/28/546 Peter Zijlstra has attempted to help out, to clean up the mess: https://lkml.org/lkml/2014/10/28/543 But has not received helpful and constructive replies which makes me doubt wether it can all be finished in time until v3.18 is released. Despite various review feedback the author (Andi Kleen) has answered only few of the review questions and has generally been uncooperative, only giving replies when prompted repeatedly, and only giving minimal answers instead of constructively explaining and helping along the effort. That kind of behavior is not acceptable. There's also a boot crash on Intel E5-1630 v3 CPUs reported for another commit from Andi Kleen: e735b9db ("perf/x86/intel/uncore: Add Haswell-EP uncore support") https://lkml.org/lkml/2014/10/22/730 Which is not yet resolved. The uncore driver is independent in theory, but the crash makes me worry about how well all these patches were tested and makes me uneasy about the level of interminging that the Broadwell and Haswell code has received by the commits above. As a first step to resolve the mess revert the Broadwell client commits back to the v3.17 version, before we run out of time and problematic code hits a stable upstream kernel. ( If the Haswell-EP crash is not resolved via a simple fix then we'll have to revert the Haswell-EP uncore driver as well. ) The Broadwell client series has to be submitted in a clean fashion, with single, well documented changes per patch. If they are submitted in time and are accepted during review then they can possibly go into v3.19 but will need additional scrutiny due to the rocky history of this patch set. Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: eranian@google.com Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1409683455-29168-3-git-send-email-andi@firstfloor.orgSigned-off-by:
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- 28 Oct, 2014 1 commit
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Peter Zijlstra authored
The uncore drivers require PCI and generate compile time warnings when !CONFIG_PCI. Reported-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Stephane Eranian <eranian@google.com> Cc: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by:
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