- 05 Nov, 2014 6 commits
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Namhyung Kim authored
The previous patch changed kernel dso name from '[kernel.kallsyms]' to vmlinux. However it might add confusion to old users accustomed to the old name. So change the short name to '[kernel.vmlinux]' to reduce such confusion. Before: # Overhead Command Shared Object Symbol # ........ .............. ....................... ............................... # 9.83% swapper vmlinux [k] intel_idle 4.10% awk libc-2.20.so [.] __strcmp_sse2 1.86% sed libc-2.20.so [.] __strcmp_sse2 1.78% netctl-auto libc-2.20.so [.] __strcmp_sse2 1.23% netctl-auto libc-2.20.so [.] __mbrtowc 1.21% firefox libxul.so [.] 0x00000000024b62bd 1.20% swapper vmlinux [k] cpuidle_enter_state 1.03% sleep vmlinux [k] copy_user_generic_unrolled After: # Overhead Command Shared Object Symbol # ........ .............. ....................... ............................... # 9.83% swapper [kernel.vmlinux] [k] intel_idle 4.10% awk libc-2.20.so [.] __strcmp_sse2 1.86% sed libc-2.20.so [.] __strcmp_sse2 1.78% netctl-auto libc-2.20.so [.] __strcmp_sse2 1.23% netctl-auto libc-2.20.so [.] __mbrtowc 1.21% firefox libxul.so [.] 0x00000000024b62bd 1.20% swapper [kernel.vmlinux] [k] cpuidle_enter_state 1.03% sleep [kernel.vmlinux] [k] copy_user_generic_unrolled Signed-off-by:Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415063674-17206-9-git-send-email-namhyung@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
There's a problem on finding correct kernel symbols when perf report runs on a different kernel. Although a part of the problem was solved by the prior commit 0a7e6d1b ("perf tools: Check recorded kernel version when finding vmlinux"), there's a remaining problem still. When perf records samples, it synthesizes the kernel map using machine__mmap_name() and ref_reloc_sym like "[kernel.kallsyms]_text". You can easily see it using 'perf report -D' command. After finishing record, it goes through the recorded events to find maps/dsos actually used. And then record build-id info of them. During this process, it needs to load symbols in a dso and it'd call dso__load_vmlinux_path() since the default value of the symbol_conf. try_vmlinux_path is true. However it changes dso->long_name to a real path of the vmlinux file (e.g. /lib/modules/3.16.4/build/vmlinux) if one is running on a custom kernel. It resulted in that perf report reads the build-id of the vmlinux, but cannot use it since it only knows about the [kernel.kallsyms] map. It then falls back to possible vmlinux paths by using the recorded kernel version (in case of a recent version) or a running kernel silently. Even with the recent tools, this still has a possibility of breaking the result. As the build directory is a symbolic link, if one built a new kernel in the same directory with different source/config, the old link to vmlinux will point the new file. So it's absolutely needed to use build-id when finding a kernel image. In this patch, it's now changed to try to search a kernel dso in the existing dso list which was constructed during build-id table parsing so it'll always have a build-id. If not found, search "[kernel.kallsyms]". Before: $ perf report # Children Self Command Shared Object Symbol # ........ ........ ....... ................. ............................... # 72.15% 0.00% swapper [kernel.kallsyms] [k] set_curr_task_rt 72.15% 0.00% swapper [kernel.kallsyms] [k] native_calibrate_tsc 72.15% 0.00% swapper [kernel.kallsyms] [k] tsc_refine_calibration_work 71.87% 71.87% swapper [kernel.kallsyms] [k] module_finalize ... After (for the same perf.data): 72.15% 0.00% swapper vmlinux [k] cpu_startup_entry 72.15% 0.00% swapper vmlinux [k] arch_cpu_idle 72.15% 0.00% swapper vmlinux [k] default_idle 71.87% 71.87% swapper vmlinux [k] native_safe_halt ... Signed-off-by:
Ingo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/r/20140924073356.GB1962@gmail.com Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415063674-17206-8-git-send-email-namhyung@kernel.orgSigned-off-by:
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Namhyung Kim authored
When perf record finishes a session, it pre-processes samples in order to write build-id info from DSOs that had samples. During this process it'll call map__load() for the kernel map, and it ends up calling dso__load_vmlinux_path() which replaces dso->long_name. But this function checks kernel's build-id before searching vmlinux path so it'll end up with a cryptic name, the pathname for the entry in the ~/.debug cache, which can be confusing to users. This patch adds a flag to skip the build-id check during record, so that it'll have the original vmlinux path for the kernel dso->long_name, not the entry in the ~/.debug cache. Before: # perf record -va sleep 3 mmap size 528384B [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.196 MB perf.data (~8545 samples) ] Looking at the vmlinux_path (7 entries long) Using /home/namhyung/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 for symbols After: # perf record -va sleep 3 mmap size 528384B [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.193 MB perf.data (~8432 samples) ] Looking at the vmlinux_path (7 entries long) Using /lib/modules/3.16.4-1-ARCH/build/vmlinux for symbols Signed-off-by:
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Namhyung Kim authored
It'd be better managing those functions in a separate place as util/header.c file is already big. It now exports following 3 functions to others: bool perf_session__read_build_ids(struct perf_session *session, bool with_hits); int perf_session__write_buildid_table(struct perf_session *session, int fd); int perf_session__cache_build_ids(struct perf_session *session); Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/545733E7.6010105@intel.com Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415063674-17206-5-git-send-email-namhyung@kernel.orgSigned-off-by:
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Namhyung Kim authored
The dsos__write_buildid_table() is not use struct dso and it mostly uses perf_session struct. So rename it to perf_session__write_buildid_ table() so that it corresponds to other related functions such as perf_session__read_build_ids() and perf_session__cache_build_ids(). Signed-off-by:
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Namhyung Kim authored
Now my Archlinux box shows module symbols correctly. Before: $ perf report --stdio Failed to open /tmp/perf-3477.map, continuing without symbols no symbols found in /usr/bin/date, maybe install a debug package? No kallsyms or vmlinux with build-id 7b4ea0a49ae2111925857099aaf05c3246ff33e0 was found [drm] with build id 7b4ea0a49ae2111925857099aaf05c3246ff33e0 not found, continuing without symbols No kallsyms or vmlinux with build-id edd931629094b660ca9dec09a1b635c8d87aa2ee was found [jbd2] with build id edd931629094b660ca9dec09a1b635c8d87aa2ee not found, continuing without symbols No kallsyms or vmlinux with build-id a7b1eada671c34933e5610bb920b2ca4945a82c3 was found [ext4] with build id a7b1eada671c34933e5610bb920b2ca4945a82c3 not found, continuing without symbols No kallsyms or vmlinux with build-id d69511fa3e5840e770336ef45b06c83fef8d74e3 was found [scsi_mod] with build id d69511fa3e5840e770336ef45b06c83fef8d74e3 not found, continuing without symbols No kallsyms or vmlinux with build-id af0430af13461af058770ee9b87afc07922c2e77 was found [libata] with build id af0430af13461af058770ee9b87afc07922c2e77 not found, continuing without symbols No kallsyms or vmlinux with build-id aaeedff8160ce631a5f0333591c6ff291201d29f was found [libahci] with build id aaeedff8160ce631a5f0333591c6ff291201d29f not found, continuing without symbols No kallsyms or vmlinux with build-id c57907712becaf662dc4981824bb372c0441d605 was found [mac80211] with build id c57907712becaf662dc4981824bb372c0441d605 not found, continuing without symbols No kallsyms or vmlinux with build-id e0589077cc0ec8c3e4c40eb9f2d9e69d236bee8f was found [iwldvm] with build id e0589077cc0ec8c3e4c40eb9f2d9e69d236bee8f not found, continuing without symbols No kallsyms or vmlinux with build-id 2d86086bf136bf374a2f029cf85a48194f9b950b was found [cfg80211] with build id 2d86086bf136bf374a2f029cf85a48194f9b950b not found, continuing without symbols No kallsyms or vmlinux with build-id 4493c48599bdb3d91d0f8db5150e0be33fdd9221 was found [iwlwifi] with build id 4493c48599bdb3d91d0f8db5150e0be33fdd9221 not found, continuing without symbols ... # # Overhead Command Shared Object Symbol # ........ ............... ....................... ........................................................ # 0.03% swapper [ext4] [k] 0x000000000000fe2e 0.03% swapper [kernel.kallsyms] [k] account_entity_enqueue 0.03% swapper [ext4] [k] 0x000000000000fc2b 0.03% irq/50-iwlwifi [iwlwifi] [k] 0x000000000000200b 0.03% swapper [kernel.kallsyms] [k] ktime_add_safe 0.03% swapper [kernel.kallsyms] [k] elv_completed_request 0.03% swapper [libata] [k] 0x0000000000003997 0.03% swapper [libahci] [k] 0x0000000000001f25 0.03% swapper [kernel.kallsyms] [k] rb_next 0.03% swapper [kernel.kallsyms] [k] blk_finish_request 0.03% swapper [ext4] [k] 0x0000000000010248 0.00% perf [kernel.kallsyms] [k] native_write_msr_safe After: $ perf report --stdio Failed to open /tmp/perf-3477.map, continuing without symbols no symbols found in /usr/bin/tr, maybe install a debug package? ... # # Overhead Command Shared Object Symbol # ........ ............... ........................... ...................................................... # 0.04% kworker/u16:3 [ext4] [k] ext4_read_block_bitmap 0.03% kworker/u16:0 [mac80211] [k] ieee80211_sta_reset_beacon_monitor 0.02% irq/50-iwlwifi [mac80211] [k] ieee80211_get_bssid 0.02% firefox [e1000e] [k] __ew32_prepare 0.02% swapper [libahci] [k] ahci_handle_port_interrupt 0.02% emacs libglib-2.0.so.0.4000.0 [.] g_mutex_unlock 0.02% swapper [e1000e] [k] e1000_clean_tx_irq 0.02% dwm [kernel.kallsyms] [k] __schedule 0.02% gnome-terminal- [vdso] [.] __vdso_clock_gettime 0.02% swapper [e1000e] [k] e1000_alloc_rx_buffers 0.02% irq/50-iwlwifi [mac80211] [k] ieee80211_rx 0.01% firefox [vdso] [.] __vdso_gettimeofday 0.01% irq/50-iwlwifi [iwlwifi] [k] iwl_pcie_rxq_restock.part.13 Signed-off-by:Jiri Olsa <jolsa@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/87h9yexshi.fsf@sejong.aot.lge.comSigned-off-by:
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- 04 Nov, 2014 1 commit
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Namhyung Kim authored
This patch adds basic support to handle compressed kernel module as some distro (such as Archlinux) carries on it now. The actual work using compression library will be added later. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415063674-17206-2-git-send-email-namhyung@kernel.orgSigned-off-by:
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- 03 Nov, 2014 7 commits
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Adrian Hunter authored
Tracing for a workload begins before the comm event is seen, which results in the initial comm having a string of the form ":<pid>" (e.g. ":12345"). In order to export the correct string, defer the export until the new script 'flush' callback. Signed-off-by:
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Adrian Hunter authored
Add the ability to export detailed information about paired calls and returns to Python db export and the export-to-postgresql.py script. Signed-off-by:
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Adrian Hunter authored
Make it possible for the database export API to use the enhanced thread stack and export detailed information about paired calls and returns. Signed-off-by:
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Adrian Hunter authored
Add branch_type and in_tx to Python db export and the export-to-postgresql.py script. Signed-off-by:
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Adrian Hunter authored
Add the ability to export branch types through the database export facility. Signed-off-by:
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Adrian Hunter authored
Enhance the thread stack to output detailed information about paired calls and returns. The enhanced processing consumes sample information via thread_stack__process() and outputs information about paired calls / returns via a call-back. While the call-back makes it possible for the facility to be used by arbitrary tools, a subsequent patch will provide the information to Python scripting via the db-export interface. An important part of the call/return information is the call path which provides a structure that defines a context sensitive call graph. Note that there are now two ways to use the thread stack. For simply providing a call stack (like you would get from the perf record -g option) the interface consists of thread_stack__event() and thread_stack__sample(). Whereas the enhanced interface consists of call_return_processor__new() and thread_stack__process(). Signed-off-by:
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Adrian Hunter authored
Add a thread stack for synthesizing call chains from call and return events. Signed-off-by:
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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:
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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 24 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: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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