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* perf scripting: Add 'flush' callback to scripting APIAdrian Hunter2014-08-22
| | | | | | | | | | | | | | | | In order to defer some output via the scripting API, there needs to be a callback after session processing but before the session is deleted. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> 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/1408129739-17368-3-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf symbols: Add 'machine' member to struct addr_locationArnaldo Carvalho de Melo2013-12-19
| | | | | | | | | | | | | | | | | | | | | | The addr_location struct should fully qualify an address, and to do that it should have in it the machine where the thread was found. Thus all functions that receive an addr_location now don't need to also receive a 'machine', those functions just need to access al->machine instead, just like it does with the other parts of an address location: al->thread, al->map, etc. Cc: Adrian Hunter <adrian.hunter@intel.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@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-o51iiee7vyq4r3k362uvuylg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add trace-event global object for tracepoint interfaceJiri Olsa2013-12-04
| | | | | | | | | | | | | | | | | | | | | | | | In order to get the proper plugins processing we need to use full trace-event interface when creating tracepoint events. So far we were using shortcut to get the parsed format. Moving current 'event_format__new' function into trace-event object as 'trace_event__tp_format'. This function uses properly initialized global trace-event object, ensuring proper plugins processing. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1386076182-14484-11-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add trace-event objectJiri Olsa2013-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | Add trace-event object to keep together 'struct pevent' object with its loaded plugins with following interface: int trace_event__init(struct trace_event *t); - Initalizes 'struct pevent' object and loads plugins for it void trace_event__cleanup(struct trace_event *t); - Cleanups both 'struct pevent' and plugins Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1386076182-14484-10-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Remove unused trace-event-* codeJiri Olsa2013-10-09
| | | | | | | | | | | | | | | Removing unused trace-event-* code. Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1379003976-5839-3-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Fix named threads supportDavid Ahern2013-07-22
| | | | | | | | | | | | Commit 73994dc broke named thread support in perf-script. The thread struct in al is the main thread for a multithreaded process. The thread struct used for analysis (e.g., dumping events) should be the specific thread for the sample. Signed-off-by: David Ahern <dsahern@gmail.com> Cc: Feng Tang <feng.tang@intel.com> Link: http://lkml.kernel.org/r/1374185175-28272-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf util: Remove unused enum and macro in trace-event.hNamhyung Kim2013-07-12
| | | | | | | | | | | | | | | | | They're internals of ftrace ring-buffer and not used in perf code directly. As it now resides on libtraceevent/kbuffer.h, just get rid of them. Signed-off-by: Namhyung Kim <namhyung@kernel.org> 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: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1370323231-14022-17-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Adopt latency_format variableNamhyung Kim2013-07-12
| | | | | | | | | | | | | | | It's the only user of the variable, so move it. Signed-off-by: Namhyung Kim <namhyung@kernel.org> 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: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1370323231-14022-14-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf util: Get rid of unused header_page_* variablesNamhyung Kim2013-07-12
| | | | | | | | | | | | | | | | They're not used anywhere and same information is kept in a pevent already. So let's get rid of them. Signed-off-by: Namhyung Kim <namhyung@kernel.org> 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: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1370323231-14022-13-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Use default include path notation for libtraceevent headersRobert Richter2013-07-12
| | | | | | | | | | | | | | Header files of libtraceevent or no longer local headers. Thus, use default path notation for them. Also removing extra traceevent include path and instead handle this similar to liblk. Signed-off-by: Robert Richter <robert.richter@linaro.org> Signed-off-by: Robert Richter <rric@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Robert Richter <rric@kernel.org> Link: http://lkml.kernel.org/r/1370964558-8599-1-git-send-email-rric@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Get rid of write_or_die() from trace-event-info.cNamhyung Kim2013-03-21
| | | | | | | | | | | | | Check return value of write and fail if error. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1363850332-25297-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Remove unused tracing functionsDavid Ahern2013-03-15
| | | | | | | | Leftovers from before libtraceevent integration. Signed-off-by: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1363151248-16674-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Support for DWARF CFI unwinding on post processingJiri Olsa2012-08-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This brings the support for DWARF cfi unwinding on perf post processing. Call frame informations are retrieved and then passed to libunwind that requests memory and register content from the applications. Adding unwind object to handle the user stack backtrace based on the user register values and user stack dump. The unwind object access the libunwind via remote interface and provides to it all the necessary data to unwind the stack. The unwind interface provides following function: unwind__get_entries And callback (specified in above function) to retrieve the backtrace entries: typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); Signed-off-by: Jiri Olsa <jolsa@redhat.com> Original-patch-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "Frank Ch. Eigler" <fche@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Benjamin Redelings <benjamin.redelings@nescent.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Ulrich Drepper <drepper@gmail.com> Link: http://lkml.kernel.org/r/1344345647-11536-12-git-send-email-jolsa@redhat.com [ Replaced use of perf_session by usage of perf_evsel ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Replace "struct thread" with "struct addr_location" as a ↵Feng Tang2012-08-08
| | | | | | | | | | | | | | | | | | | | | | | | | parameter for "process_event()" Both perl and python script start processing events other than trace points, and it's useful to pass the resolved symbol and the dso info to the event handler in script for better analysis and statistics. Struct thread is already a member of struct addr_location, using addr_location will keep the thread info, while providing additional symbol and dso info if exist, so that the script itself doesn't need to bother to do the symbol resolving and dso searching work. Tested-by: David Ahern <dsahern@gmail.com> Signed-off-by: Feng Tang <feng.tang@intel.com> Acked-by: David Ahern <dsahern@gmail.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/1344419875-21665-3-git-send-email-feng.tang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Stop using pevent directlyArnaldo Carvalho de Melo2012-08-07
| | | | | | | | | | | | | | | | We can get all that is needed using just event_format, that is available via evsel->tp_format now. 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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-2hsr1686epa9f0vx4yg7z2zj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf evsel: Cache associated event_formatArnaldo Carvalho de Melo2012-08-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* perf tools: Stop using a global trace events description listArnaldo Carvalho de Melo2012-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pevent thing is per perf.data file, so I made it stop being static and become a perf_session member, so tools processing perf.data files use perf_session and _there_ we read the trace events description into session->pevent and then change everywhere to stop using that single global pevent variable and use the per session one. Note that it _doesn't_ fall backs to trace__event_id, as we're not interested at all in what is present in the /sys/kernel/debug/tracing/events in the workstation doing the analysis, just in what is in the perf.data file. This patch also introduces perf_session__set_tracepoints_handlers that is the perf perf.data/session way to associate handlers to tracepoint events by resolving their IDs using the events descriptions stored in a perf.data file. Make 'perf sched' use it. Reported-by: Dmitry Antipov <dmitry.antipov@linaro.org> Tested-by: Dmitry Antipov <dmitry.antipov@linaro.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linaro-dev@lists.linaro.org Cc: patches@linaro.org Link: http://lkml.kernel.org/r/20120625232016.GA28525@infradead.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* parse-events: Rename struct record to struct pevent_recordSteven Rostedt2012-04-25
| | | | | | | | | | | | | | | | | | As libtraceevent will be a library, having struct record is far too generic of a name to use. Renaming it to be consistent with the rest of the functions will be a better long term solution. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* perf: Have perf use the new libtraceevent.a librarySteven Rostedt2012-04-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The event parsing code in perf was originally copied from trace-cmd but never was kept up-to-date with the changes that was done there. The trace-cmd libtraceevent.a code is much more mature than what is currently in perf. This updates the code to use wrappers to handle the calls to the new event parsing code. The new code requires a handle to be pass around, which removes the global event variables and allows more than one event structure to be read from different files (and different machines). But perf still has the old global events and the code throughout perf does not yet have a nice way to pass around a handle. A global 'pevent' has been made for perf and the old calls have been created as wrappers to the new event parsing code that uses the global pevent. With this change, perf can later incorporate the pevent handle into the perf structures and allow more than one file to be read and compared, that contains different events. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* perf: Separate out trace-cmd parse-events from perf filesSteven Rostedt2012-04-25
| | | | | | | | | | | | | | | | | | | | | | | | | Move the trace-event-parse.c code that originally came from trace-cmd into their own files. The new file will be called trace-parse-events.c, as the name of trace-cmd's file was parse-events.c too, but it conflicted with the parse-events.c file in perf that parses the command line. This tries to update the code with mimimal changes. Perf specific code stays in the trace-event-parse.[ch] files and the common parsing code is now in trace-parse-events.c and trace-parse-events.h. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* perf tools: Resolve machine earlier and pass it to perf_event_opsArnaldo Carvalho de Melo2011-11-28
| | | | | | | | | | | | | | Reducing the exposure of perf_session further, so that we can use the classes in cases where no perf.data file is created. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> 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-stua66dcscsezzrcdugvbmvd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Fix tracing info recordingJiri Olsa2011-10-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixing the way the tracing information is stored within record command. The current implementation is causing issues for pipe output. Following commands fail currently: perf script syscall-counts ls perf record -e syscalls:sys_exit_read ls | ./perf report -i - The tracing information is part of the perf data file. It contains several files from within the tracing debugfs and procs directories. Beside some static header files, for each tracing event the format file is added. The /proc/kallsyms file is also added. The tracing data are stored with preceeding size. This is causing some dificulties for pipe output, since there's no way to tell debugfs/proc file size before reading it. So, for pipe output, all the debugfs files were read twice. Once to get the overall size and once to store the content itself. This can cause problem in case any of these file changed, within the storage time. To fix this behaviour and ensure the integrity of the tracing data, we: - read debugfs/proc file into the temp file - get temp file size and dump it to the pipe - dump the temp file contents to the pipe Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20111020135943.GD2092@jolsa.brq.redhat.com Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf session: Pass evsel in event_ops->sample()Arnaldo Carvalho de Melo2011-03-23
| | | | | | | | | | | | | | | | | | | | Resolving the sample->id to an evsel since the most advanced tools, report and annotate, and the others will too when they evolve to properly support multi-event perf.data files. Good also because it does an extra validation, checking that the ID is valid when present. When that is not the case, the overhead is just a branch + function call (perf_evlist__id2evsel). Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Move printing of 'common' data from print_event and renameDavid Ahern2011-03-14
| | | | | | | | | | | | | | | This change does impact output: latency data is trace specific and is now printed after the common data - comm, tid, cpu, time and event name. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <1299734608-5223-4-git-send-email-daahern@cisco.com> Signed-off-by: David Ahern <daahern@cisco.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf script: Change process_event prototypeDavid Ahern2011-03-14
| | | | | | | | | | | | | | Prepare for handling of samples for any event type. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <1299734608-5223-2-git-send-email-daahern@cisco.com> Signed-off-by: David Ahern <daahern@cisco.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Introduce event selectorsArnaldo Carvalho de Melo2011-01-03
| | | | | | | | | | | | | | | | | | | | | | | | Out of ad-hoc code and global arrays with hard coded sizes. This is the first step on having a library that will be first used on regression tests in the 'perf test' tool. [acme@felicio linux]$ size /tmp/perf.before text data bss dec hex filename 1273776 97384 5104416 6475576 62cf38 /tmp/perf.before [acme@felicio linux]$ size /tmp/perf.new text data bss dec hex filename 1275422 97416 1392416 2765254 2a31c6 /tmp/perf.new Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf: Fix unaligned accesses while fetching trace valuesFrederic Weisbecker2010-05-20
| | | | | | | | | | | | | | | | | | | | | Accessing trace values of an 8 size may end up in a segfault on archs that can't deal with misaligned access, which is the case for sparc 64. This is because PERF_SAMPLE_RAW are aligned to 4 and not to 8. Fix this on the macros that get the values of 8 size. This fixes segfaults on perf tools in sparc 64. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: David Miller <davem@davemloft.net>
* Merge branch 'perf/core' of ↵Ingo Molnar2010-05-03
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
| * perf: Fix warning while reading ring buffer headersFrederic Weisbecker2010-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit e9e94e3bd862d31777335722e747e97d9821bc1d "perf trace: Ignore "overwrite" field if present in /events/header_page" makes perf trace launching spurious warnings about unexpected tokens read: Warning: Error: expected type 6 but read 4 This change tries to handle the overcommit field in the header_page file whenever this field is present or not. The problem is that if this field is not present, we try to find it and give up in the middle of the line when we realize we are actually dealing with another field, which is the "data" one. And this failure abandons the file pointer in the middle of the "data" description line: field: u64 timestamp; offset:0; size:8; signed:0; field: local_t commit; offset:8; size:8; signed:1; field: char data; offset:16; size:4080; signed:1; ^^^ Here What happens next is that we want to read this line to parse the data field, but we fail because the pointer is not in the beginning of the line. We could probably fix that by rewinding the pointer. But in fact we don't care much about these headers that only concern the ftrace ring-buffer. We don't use them from perf. Just skip this part of perf.data, but don't remove it from recording to stay compatible with olders perf.data Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Cc: Steven Rostedt <rostedt@goodmis.org>
* | perf: add perf-inject builtinTom Zanussi2010-05-02
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frédéric Weisbecker <fweisbec@gmail.com> LKML-Reference: <1272696080-16435-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf: Convert perf tracing data into a tracing_data eventTom Zanussi2010-04-14
| | | | | | | | | | | | | | | | | | | | | | | Bypasses the tracing_data perf header code and replaces it with a synthesized event and processing function that accomplishes the same thing, used when reading/writing perf data to/from a pipe. The tracing data is pretty large, and this patch doesn't attempt to break it down into component events. The tracing_data event itself doesn't actually contain the tracing data, rather it arranges for the event processing code to skip over it after it's read, using the skip return value added to the event processing loop in a previous patch. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: k-keiichi@bx.jp.nec.com Cc: acme@ghostprotocols.net LKML-Reference: <1270184365-8281-8-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf: Fix endianness argument compatibility with OPT_BOOLEAN() and introduce ↵Ian Munsie2010-04-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OPT_INCR() Parsing an option from the command line with OPT_BOOLEAN on a bool data type would not work on a big-endian machine due to the manner in which the boolean was being cast into an int and incremented. For example, running 'perf probe --list' on a PowerPC machine would fail to properly set the list_events bool and would therefore print out the usage information and terminate. This patch makes OPT_BOOLEAN work as expected with a bool datatype. For cases where the original OPT_BOOLEAN was intentionally being used to increment an int each time it was passed in on the command line, this patch introduces OPT_INCR with the old behaviour of OPT_BOOLEAN (the verbose variable is currently the only such example of this). I have reviewed every use of OPT_BOOLEAN to verify that a true C99 bool was passed. Where integers were used, I verified that they were only being used for boolean logic and changed them to bools to ensure that they would not be mistakenly used as ints. The major exception was the verbose variable which now uses OPT_INCR instead of OPT_BOOLEAN. Signed-off-by: Ian Munsie <imunsie@au.ibm.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: <stable@kernel.org> # NOTE: wont apply to .3[34].x cleanly, please backport Cc: Git development list <git@vger.kernel.org> Cc: Ian Munsie <imunsie@au1.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Valdis.Kletnieks@vt.edu Cc: WANG Cong <amwang@redhat.com> Cc: Thiago Farina <tfransosi@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Mike Galbraith <efault@gmx.de> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: John Kacur <jkacur@redhat.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1271147857-11604-1-git-send-email-imunsie@au.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf/scripts: Add Python scripting engineTom Zanussi2010-02-24
| | | | | | | | | | | | | | Add base support for Python scripting to perf trace. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-6-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* perf/scripts: Move common code out of Perl-specific filesTom Zanussi2010-02-23
| | | | | | | | | | | | | | | This stuff is needed by all scripting engines; move it from the Perl engine source to a more common place. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Keiichi KII <k-keiichi@bx.jp.nec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1264580883-15324-4-git-send-email-tzanussi@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* perf trace/scripting: Add support for script argsTom Zanussi2009-12-15
| | | | | | | | | | | | | | | One oversight of the original scripting_ops patch was a lack of support for passing args to handler scripts. This adds argc/argv to the start_script() scripting_op, and changes the rw-by-file script to take 'comm' arg rather than the 'perf' value currently hard-coded. It also takes the opportunity to do some related minor cleanup. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org LKML-Reference: <1260867220-15699-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add interface to access perf data from Perl handlersTom Zanussi2009-11-28
| | | | | | | | | | | | | | | | | | | | | | | | | | The Perl scripting support for perf trace allows most of a trace event's data to be accessed directly as handler arguments, but not all of it e.g. the less common fields aren't passed in. To give scripts access to the other fields and/or any other data or metadata in the main perf executable that might be useful, a way to access the C data in perf from Perl is needed; this patch uses the Perl XS facility to do it for the common_xxx event fields not passed to handler functions. Context.pm exports three functions to Perl scripts that access fields for the current event by calling back into perf: common_pc(), common_flags() and common_lock_depth(). Support for common_flags() field values was added to Core.pm and a script used to sanity check these and other basic scripting features, check-perf-trace.pl, was also added. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: anton@samba.org Cc: hch@infradead.org LKML-Reference: <1259133352-23685-6-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add Perl scripting supportTom Zanussi2009-11-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement trace_scripting_ops to make Perl a supported perf trace scripting language. Additionally adds code that allows Perl trace scripts to access the 'flag' and 'symbolic' (__print_flags(), __print_symbolic()) field information parsed from the trace format files. Also adds the Perl implementation of the generate_script() trace_scripting_op, which creates a ready-to-run perf trace Perl script based on existing trace data. Scripts generated by this implementation print out all the fields for each event mentioned in perf.data (and will detect and generate the proper scripting code for 'flag' and 'symbolic' fields), and will additionally generate handlers for the special 'trace_unhandled', 'trace_begin' and 'trace_end' handlers. Script authors can simply remove the printing code to implement their own custom event handling. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: anton@samba.org Cc: hch@infradead.org LKML-Reference: <1259133352-23685-4-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add flag/symbolic format_flagsTom Zanussi2009-11-28
| | | | | | | | | | | | | | | It's useful to know whether a field is a flag or symbolic field for e.g. when generating scripts - it allows us to translate those fields specially rather than literally as plain numeric values. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: anton@samba.org Cc: hch@infradead.org LKML-Reference: <1259133352-23685-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add scripting opsTom Zanussi2009-11-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds an interface, scripting_ops, that when implemented for a particular scripting language enables built-in support for trace stream processing using that language. The interface is designed to enable full-fledged language interpreters to be embedded inside the perf executable and thereby make the full capabilities of the supported languages available for trace processing. See below for details on the interface. This patch also adds a couple command-line options to 'perf trace': The -s option option is used to specify the script to be run. Script names that can be used with -s take the form: [language spec:]scriptname[.ext] Scripting languages register a set of 'language specs' that can be used to specify scripts for the registered languages. The specs can be used either as prefixes or extensions. If [language spec:] is used, the script is taken as a script of the matching language regardless of any extension it might have. If [language spec:] is not used, [.ext] is used to look up the language it corresponds to. Language specs are case insensitive. e.g. Perl scripts can be specified in the following ways: Perl:scriptname pl:scriptname.py # extension ignored PL:scriptname scriptname.pl scriptname.perl The -g [language spec] option gives users an easy starting point for writing scripts in the specified language. Scripting support for a particular language can implement a generate_script() scripting op that outputs an empty (or near-empty) set of handlers for all the events contained in a given perf.data trace file - this option gives users a direct way to access that. Adding support for a scripting language --------------------------------------- The main thing that needs to be done do add support for a new language is to implement the scripting_ops interface: It consists of the following four functions: start_script() stop_script() process_event() generate_script() start_script() is called before any events are processed, and is meant to give the scripting language support an opportunity to set things up to receive events e.g. create and initialize an instance of a language interpreter. stop_script() is called after all events are processed, and is meant to give the scripting language support an opportunity to clean up e.g. destroy the interpreter instance, etc. process_event() is called once for each event and takes as its main parameter a pointer to the binary trace event record to be processed. The implementation is responsible for picking out the binary fields from the event record and sending them to the script handler function associated with that event e.g. a function derived from the event name it's meant to handle e.g. 'sched::sched_switch()'. The 'format' information for trace events can be used to parse the binary data and map it into a form usable by a given scripting language; see the Perl implemention in subsequent patches for one possible way to leverage the existing trace format parsing code in perf and map that info into specific scripting language types. generate_script() should generate a ready-to-run script for the current set of events in the trace, preferably with bodies that print out every field for each event. Again, look at the Perl implementation for clues as to how that can be done. This is an optional, but very useful op. Support for a given language should also add a language-specific setup function and call it from setup_scripting(). The language-specific setup function associates the the scripting ops for that language with one or more 'language specifiers' (see below) using script_spec_register(). When a script name is specified on the command line, the scripting ops associated with the specified language are used to instantiate and use the appropriate interpreter to process the trace stream. In general, it should be relatively easy to add support for a new language, especially if the language implementation supports an interface allowing an interpreter to be 'embedded' inside another program (in this case the containing program will be 'perf trace'). If so, it should be relatively straightforward to translate trace events into invocations of user-defined script functions where e.g. the function name corresponds to the event type and the function parameters correspond to the event fields. The event and field type information exported by the event tracing infrastructure (via the event 'format' files) should be enough to parse and send any piece of trace data to the user script. The easiest way to see how this can be done would be to look at the Perl implementation contained in perf/util/trace-event-perl.c/.h. There are a couple of other things that aren't covered by the scripting_ops or setup interface and are technically optional, but should be implemented if possible. One of these is support for 'flag' and 'symbolic' fields e.g. being able to use more human-readable values such as 'GFP_KERNEL' or HI/BLOCK_IOPOLL/TASKLET in place of raw flag values. See the Perl implementation to see how this can be done. The other thing is support for 'calling back' into the perf executable to access e.g. uncommon fields not passed by default into handler functions, or any metadata the implementation might want to make available to users via the language interface. Again, see the Perl implementation for examples. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: fweisbec@gmail.com Cc: rostedt@goodmis.org Cc: anton@samba.org Cc: hch@infradead.org LKML-Reference: <1259133352-23685-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Read_tracing_data should die() another dayArnaldo Carvalho de Melo2009-11-21
| | | | | | | | | | | | | | | | | | | | | | | | It better propagate errors, also if we do a simple: [root@doppio linux-2.6-tip]# perf record -R -a -f sleep 3s ; perf trace [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.182 MB perf.data (~7972 samples) ] Fatal: not an trace data file [root@doppio linux-2.6-tip]# That is what is expected, right? I.e. as we didn't specify any tracepoint event via -e, it should gracefully bail out and not SEGFAULT. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1258821086-11521-3-git-send-email-acme@infradead.org> [ Fixed the error messages some more ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Add latency format to trace outputSteven Rostedt2009-10-15
| | | | | | | | | | | | | | | | | Add the irqs disabled, preemption count, need resched, and other info that is shown in the latency format of ftrace. # perf trace -l perf-16457 2..s2. 53636.260344: kmem_cache_free: call_site=ffffffff811198f perf-16457 2..s2. 53636.264330: kmem_cache_free: call_site=ffffffff811198f perf-16457 2d.s4. 53636.300006: kmem_cache_free: call_site=ffffffff810d889 Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194400.076588953@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Still continue on failed parsing of an eventSteven Rostedt2009-10-15
| | | | | | | | | | | | | | | | Even though an event may fail to parse, we should not kill the entire report. The trace should still be able to show what it can. If an event fails to parse, a warning is printed, and the output continues. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194359.190809589@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Merge trace.info content into perf.dataFrederic Weisbecker2009-10-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This drops the trace.info file and move its contents into the common perf.data file. This is done by creating a new trace_info section into this file. A user of perf headers needs to call perf_header__set_trace_info() to save the trace meta informations into the perf.data file. A file created by perf after his patch is unsupported by previous version because the size of the headers have increased. That said, it's two new fields that have been added in the end of the headers, and those could be ignored by previous versions if they just handled the dynamic header size and then ignore the unknow part. The offsets guarantee the compatibility. We'll do a -stable fix for that. But current previous versions handle the header size using its static size, not dynamic, then it's not backward compatible with trace records. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20091006213643.GA5343@nowhere> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add string/dynamic cases to format_flagsTom Zanussi2009-10-06
| | | | | | | | | | | | | | | | Needed for distinguishing string fields in event stream processing. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: rostedt@goodmis.org Cc: lizf@cn.fujitsu.com Cc: hch@infradead.org Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1254809398-8078-4-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf trace: Add subsystem string to struct eventTom Zanussi2009-10-06
| | | | | | | | | | | | | | | | Needed to fully qualify event names for event stream processing. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: rostedt@goodmis.org Cc: lizf@cn.fujitsu.com Cc: hch@infradead.org Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1254809398-8078-3-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* tracing/events: Add 'signed' field to format filesTom Zanussi2009-10-06
| | | | | | | | | | | | | | | | | | The sign info used for filters in the kernel is also useful to applications that process the trace stream. Add it to the format files and make it available to userspace. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: rostedt@goodmis.org Cc: lizf@cn.fujitsu.com Cc: hch@infradead.org Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1254809398-8078-2-git-send-email-tzanussi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Protect header files with a consistent styleJohn Kacur2009-09-24
| | | | | | | | There was a colorful mix of header guards - standardize them. Signed-off-by: John Kacur <jkacur@redhat.com> LKML-Reference: <alpine.LFD.2.00.0909241756530.11383@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf: Do the big rename: Performance Counters -> Performance EventsIngo Molnar2009-09-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf sched: Fix bad event alignmentFrederic Weisbecker2009-09-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | perf sched raises the following error when it meets a sched switch event: perf: builtin-sched.c:286: register_pid: Assertion `!(pid >= 65536)' failed. Abandon Currently in x86-64, the sched switch events have a hole in the middle of the structure: u16 common_type; u8 common_flags; u8 common_preempt_count; u32 common_pid; u32 common_tgid; char prev_comm[16]; u32 prev_pid; u32 prev_prio; <--- there u64 prev_state; char next_comm[16]; u32 next_pid; u32 next_prio; Gcc inserts a 4 bytes hole there for prev_state to be u64 aligned. And the events are exported to userspace with this hole. But in userspace, from perf sched, we fetch it using a structure that has a new field in the beginning: u32 size. This is because our trace is exported with its size as a field. But now that we have this new field, the hole in the middle disappears because it makes prev_state becoming well aligned. And since we are using a pointer to the raw trace using this struct, instead of reading prev_state, we are reading the hole. We could fix it by keeping the size seperate from the struct but actually there a lot of other potential problems: some fields may be saved as long in a 64 bits system and later read as long in a 32 bits system. Also this direct cast doesn't care about the endianness differences between the host traced machine and the machine in which we do the post processing. So instead of using such dangerous direct casts, fetch the values using the trace parsing API that already takes care of all these problems. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf sched: Import schedbench.cIngo Molnar2009-09-13
| | | | | | | | | | | | | | | | | Import the schedbench.c tool that i wrote some time ago to simulate scheduler behavior but never finished. It's a good basis for perf sched nevertheless. Most of its guts are not hooked up to the perf event loop yet - that will be done in the patches to come. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>