- 25 Jun, 2012 1 commit
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Robert Richter authored
Fix section mismatch in uncore_pci_init(): WARNING: vmlinux.o(.init.text+0x9246): Section mismatch in reference from the function uncore_pci_init() to the function .devexit.text:uncore_pci_remove() The function __init uncore_pci_init() references a function __devexit uncore_pci_remove(). [...] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: <a.p.zijlstra@chello.nl> Cc: <zheng.z.yan@intel.com> Link: http://lkml.kernel.org/r/20120620163927.GI5046@erda.amd.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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- 20 Jun, 2012 1 commit
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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 improvements from Arnaldo Carvalho de Melo: * Replace event_name with perf_evsel__name, that handles the event modifiers and doesn't use static variables. * GTK browser improvements, from Namhyung Kim * Fix possible NULL pointer deref in the TUI annotate browser, from Samuel Liao * Add sort by source file:line number, using addr2line. * Allow printing histogram text snapshots at any point in top/report. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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- 19 Jun, 2012 20 commits
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Samuel Liao authored
Sym may be NULL, and that will cause perf to crash. Signed-off-by: Shan Wei <davidshan@tencent.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/4FCD95D3.90209@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Now that __event_name is gone, no need to export __perf_evsel__[hs]w_name(). 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-rpjnarbt83nu9uowrfatmy12@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Removing unused evsel parameter from machine__resolve_callchain function. Plus related header file and callers changes. The evsel parameter is unused since following commit: perf callchain: Make callchain cursors TLS commit 47260645 Author: Namhyung Kim <namhyung.kim@lge.com> Date: Thu May 31 14:43:26 2012 +0900 Signed-off-by: Jiri Olsa <jolsa@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/1339420814-7379-9-git-send-email-jolsa@redhat.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
I forgot to add the modifiers to raw events too, fix it. Reported-by: Jiri Olsa <jolsa@redhat.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> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-pi267j1aqqjti9rqh9qy4g58@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Not needed anymore, the parsing code can just leave evsel->name as NULL and the first call to perf_evsel__name() will do exactly what was being pre-cached using __event_name(). 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-cn2eiijcinnc97buod8cs34m@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
One needs to use perf_evsel__name() so that if needed the name gets synthesized and stored in evsel->name, from where perf_evsel__name() will serve from them on. 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-ml7zbenjmri9bghmrea0jm0d@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
No logic change, just remove one more user of __event_name(). 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-e4f0vuy3283hmzfjjvkgm7fo@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
So that we don't use global variables that could make us misreport event names when having a multi window top, for instance. 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-mccancovi1u0wdkg8ncth509@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Now to convert all event_name users to perf_evsel__name. 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-buuz0j0gynseglxa76r01rdn@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
[root@sandy ~]# perf record -e task-clock:u -a usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.482 MB perf.data (~21073 samples) ] [root@sandy ~]# Before: [root@sandy ~]# perf evlist task-clock [root@sandy ~]# After: [root@sandy ~]# perf evlist task-clock:u [root@sandy ~]# Ditto for other tools. 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-97ltkmj7v23kyhflltf6iz5n@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
[root@sandy ~]# perf record -a -e dTLB-load-misses:u usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.486 MB perf.data (~21216 samples) ] Before: [root@sandy ~]# perf evlist dTLB-load-misses [root@sandy ~]# After: [root@sandy ~]# perf evlist dTLB-load-misses:u [root@sandy ~]# Ditto for other tools. 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-7x1b0e6jthkr93lfjzsuakk5@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
From perf_evsel__hw_name, so that we can use it for the other kinds of events (tracepoints, software, hw cache, etc). 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-9gmd5wewsrvtny8tzxjfp471@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
To avoid having to resort to --stdio, that expands everything, instead allow the user to go on expanding the relevant callchains and then press 'P' to print that view. As the hists browser is used for both static (report) and dynamic (top) views, it prints to a 'perf.hists.N' sequence, i.e. multiple snapshots can be taken in report and top. 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-wr9xx4ba0utrynu5j6wotd79@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Remove the trailing whitespaces. 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-8bxozh5lyixgjmziqaxo9675@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
Define and use perf_gtk_eops to provide a GTK2 message dialog for error reporting and a info_bar for warning. As GtkInfoBar requires recent GTK+ libraries, provides a fallback implementation using statusbar widget too. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338265382-6872-8-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
The GtkInfoBar is a modern UI component to display messages without bothering the main window. It'll be used for showing a warning message. As the GtkInfoBar requires 2.18 (or newer) version of GTK+ library, add availability check to Makefile too. Suggested-by: Sunjin Yang <fan4326@gmail.com> Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338265382-6872-7-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
Add statusbar widget to display non-critical messages at the bottom of the window. This can be used for showing a status change, warning or help message. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338265382-6872-6-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
The struct perf_gtk_context is for tracking current state of GTK window and/or other things. This is a preparation of next changes. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338265382-6872-5-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim authored
The struct perf_error_ops is for flexible error logging. We can register appropriate functions based on front-end. Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338265382-6872-4-git-send-email-namhyung@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Arnaldo Carvalho de Melo authored
Using addr2line for now, requires debuginfo, needs more work to support detached debuginfo, aka foo-debuginfo packages. Example: [root@sandy ~]# perf record -a sleep 3 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.555 MB perf.data (~24236 samples) ] [root@sandy ~]# perf report -s dso,srcline 2>&1 | grep -v ^# | head -5 22.41% [kernel.kallsyms] /home/git/linux/drivers/idle/intel_idle.c:280 4.79% [kernel.kallsyms] /home/git/linux/drivers/cpuidle/cpuidle.c:148 4.78% [kernel.kallsyms] /home/git/linux/arch/x86/include/asm/atomic64_64.h:121 4.49% [kernel.kallsyms] /home/git/linux/kernel/sched/core.c:1690 4.30% [kernel.kallsyms] /home/git/linux/include/linux/seqlock.h:90 [root@sandy ~]# [root@sandy ~]# perf top -U -s dso,symbol,srcline Samples: 1K of event 'cycles', Event count (approx.): 589617389 18.66% [kernel] [k] copy_user_generic_unrolled /home/git/linux/arch/x86/lib/copy_user_64.S:143 7.83% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:39 6.59% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:38 3.66% [kernel] [k] page_fault /home/git/linux/arch/x86/kernel/entry_64.S:1379 3.25% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:40 3.12% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:37 2.74% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:36 2.39% [kernel] [k] clear_page /home/git/linux/arch/x86/lib/clear_page_64.S:43 2.12% [kernel] [k] ioread32 /home/git/linux/lib/iomap.c:90 1.51% [kernel] [k] copy_user_generic_unrolled /home/git/linux/arch/x86/lib/copy_user_64.S:144 1.19% [kernel] [k] copy_user_generic_unrolled /home/git/linux/arch/x86/lib/copy_user_64.S:154 Suggested-by: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.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-pdmqbng9twz06jzkbgtuwbp8@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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- 18 Jun, 2012 18 commits
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Peter Zijlstra authored
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-ucnds8gkve4x3s4biuukyph3@git.kernel.org [ Trivial build fix ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Jiri Olsa authored
Adding automated test for parsing terms out of the event grammar. Also slightly changing current event parsing test functions to follow up more generic namespace. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-14-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Zheng Yan authored
Add support to specify alias term within the event description. The definition of pmu event alias is located at: ${sysfs_mount}/bus/event_source/devices/${pmu}/events/ Each file in the 'events' directory defines a event alias. Its contents are like: config=1,config1=2 Using pmu event alias, an event can be now specified like: uncore/CLOCKTICKS/ or uncore/event=CLOCKTICKS/ Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> [ Cleaned it up. ] Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1339741902-8449-13-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Jiri Olsa authored
We want to reuse the event grammar for parsing aliased terms. The obvious reason is we dont need to add new code when there's already support for this in event grammar. Doing this by adding terms and event start entries into event parse grammar. The grammar forks on the begining based on the starting token, which is supplied via bison interface into the lexer. The lexer then returns the starting token as the first token, thus making the grammar switch accordingly. Currently 2 starting tokens/grammars are supported: PE_START_TERMS, PE_START_EVENTS The PE_START_TERMS related grammar uses 'event_config' part of the grammar for term parsing. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-12-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Zheng Yan authored
Make the event parser reentrant by creating separate scanner for each parsing. The scanner is passed to the bison as and argument to the lexer. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> [ Cleaned up the patch. ] Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-11-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Jiri Olsa authored
Moving all the bison arguments into the structure. In upcomming patches we are going to: - add more arguments - reuse the grammer for term parsing so it's more clear to pack/separate related arguments. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-10-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
The uncore subsystem in Sandy Bridge-EP consists of 8 components: Ubox, Cacheing Agent, Home Agent, Memory controller, Power Control, QPI Link Layer, R2PCIe, R3QPI. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1339741902-8449-9-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
This patch adds generic support for uncore PMUs presented as PCI devices. (These come in addition to the CPU/MSR based uncores.) Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-8-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1339741902-8449-7-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
This patch adds the generic Intel uncore PMU support, including helper functions that add/delete uncore events, a hrtimer that periodically polls the counters to avoid overflow and code that places all events for a particular socket onto a single cpu. The code design is based on the structure of Sandy Bridge-EP's uncore subsystem, which consists of a variety of components, each component contains one or more "boxes". (Tooling support follows in the next patches.) Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1339741902-8449-6-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
Originally from Peter Zijlstra. The helper migrates perf events from one cpu to another cpu. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-5-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
Allow the pmu->event_init callback to change event->cpu, so the PMU driver can choose the CPU on which to install events. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-4-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
perf_event_open() requires the cpu on which to install event is online, but the cpu can go offline after perf_event_open checks that. Add a get_online_cpus()/put_online_cpus() pair to avoid the race. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-3-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Yan, Zheng authored
Export perf_assign_events() so the uncore code can use it to schedule events. Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1339741902-8449-2-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Merge in all fixes before applying more changes. Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Salman Qazi authored
An rmdir pushes css's ref count to zero. However, if the associated directory is open at the time, the dentry ref count is non-zero. If the fd for this directory is then passed into perf_event_open, it does a css_get(). This bounces the ref count back up from zero. This is a problem by itself. But what makes it turn into a crash is the fact that we end up doing an extra dput, since we perform a dput when css_put sees the ref count go down to zero. css_tryget() does not fall into that trap. So, we use that instead. Reproduction test-case for the bug: #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <linux/unistd.h> #include <linux/perf_event.h> #include <string.h> #include <errno.h> #include <stdio.h> #define PERF_FLAG_PID_CGROUP (1U << 2) int perf_event_open(struct perf_event_attr *hw_event_uptr, pid_t pid, int cpu, int group_fd, unsigned long flags) { return syscall(__NR_perf_event_open,hw_event_uptr, pid, cpu, group_fd, flags); } /* * Directly poke at the perf_event bug, since it's proving hard to repro * depending on where in the kernel tree. what moved? */ int main(int argc, char **argv) { int fd; struct perf_event_attr attr; memset(&attr, 0, sizeof(attr)); attr.exclude_kernel = 1; attr.size = sizeof(attr); mkdir("/dev/cgroup/perf_event/blah", 0777); fd = open("/dev/cgroup/perf_event/blah", O_RDONLY); perror("open"); rmdir("/dev/cgroup/perf_event/blah"); sleep(2); perf_event_open(&attr, fd, 0, -1, PERF_FLAG_PID_CGROUP); perror("perf_event_open"); close(fd); return 0; } Signed-off-by: Salman Qazi <sqazi@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/20120614223108.1025.2503.stgit@dungbeetle.mtv.corp.google.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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Robert Richter authored
The RDPMC index calculation is wrong for AMD family 15h (X86_FEATURE_ PERFCTR_CORE set). This leads to a #GP when accessing the counter: Pid: 2237, comm: syslog-ng Not tainted 3.5.0-rc1-perf-x86_64-standard-g130ff90 #135 AMD Pike/Pike RIP: 0010:[<ffffffff8100dc33>] [<ffffffff8100dc33>] x86_perf_event_update+0x27/0x66 While the msr address offset is (index << 1) we must use index to select the correct rdpmc. Signed-off-by: Robert Richter <robert.richter@amd.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vince Weaver <vweaver1@eecs.utk.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core Pull ftrace robustization fixes from Steve Rostedt. Signed-off-by: Ingo Molnar <mingo@kernel.org>
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