lwn.git/include/linux/perf_counter.h, branch docs-fixes

perf events: Remove unused perf_counter.h header file

2009-12-17T08:51:26+00:00

Since nothing includes the file and it's also not exported to user space, remove it. Signed-off-by: Robert P. J. Day Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: Signed-off-by: Ingo Molnar

Merge branches 'perf/powerpc' and 'perf/bench' into perf/core

2009-11-15T08:51:24+00:00

Merge reason: Both 'perf bench' and the pending PowerPC changes are now ready for the next merge window. Signed-off-by: Ingo Molnar

perf_event: Add alignment-faults and emulation-faults software events

2009-10-28T05:13:03+00:00

Add two more software events that are common to many cpus. Alignment faults: When a load or store is not aligned properly. Emulation faults: When an instruction is emulated in software. Both cause a very significant slowdown (100x or worse), so identifying and fixing them is very important. Signed-off-by: Anton Blanchard Signed-off-by: Paul Mackerras

tracing/profile: Add filter support

2009-10-15T09:35:23+00:00

- Add an ioctl to allocate a filter for a perf event. - Free the filter when the associated perf event is to be freed. - Do the filtering in perf_swevent_match(). Signed-off-by: Li Zefan Acked-by: Peter Zijlstra Acked-by: Frederic Weisbecker Cc: Steven Rostedt Cc: Tom Zanussi LKML-Reference: <4AD69546.8050401@cn.fujitsu.com> Signed-off-by: Ingo Molnar

perf_event: Update PERF_EVENT_FORK header definition

2009-09-22T13:42:01+00:00

PERF_EVENT_FORK always outputs the time field, so update the header to reflect this. Signed-off-by: Anton Blanchard Cc: Arjan van de Ven Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Frederic Weisbecker LKML-Reference: <20090922123424.GD19453@kryten> Signed-off-by: Ingo Molnar

perf: Tidy up after the big rename

2009-09-21T12:34:11+00:00

- provide compatibility Kconfig entry for existing PERF_COUNTERS .config's - provide courtesy copy of old perf_counter.h, for user-space projects - small indentation fixups - fix up MAINTAINERS - fix small x86 printout fallout - fix up small PowerPC comment fallout (use 'counter' as in register) Reviewed-by: Arjan van de Ven Acked-by: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: Frederic Weisbecker LKML-Reference: Signed-off-by: Ingo Molnar

perf: Do the big rename: Performance Counters -> Performance Events

2009-09-21T12:28:04+00:00

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_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 Acked-by: Peter Zijlstra Acked-by: Paul Mackerras Reviewed-by: Arjan van de Ven Cc: Mike Galbraith Cc: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker Cc: Steven Rostedt Cc: Benjamin Herrenschmidt Cc: David Howells Cc: Kyle McMartin Cc: Martin Schwidefsky Cc: "David S. Miller" Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: LKML-Reference: Signed-off-by: Ingo Molnar

perf_counter: Rename list_entry -> group_entry, counter_list -> group_list

2009-09-21T10:54:51+00:00

This is in preparation of the big rename, but also makes sense in a standalone way: 'list_entry' is a bad name as we already have a list_entry() in list.h. Also, the 'counter list' is too vague, it doesnt tell us the purpose of that list. Clarify these names to show that it's all about the group hiearchy. Acked-by: Peter Zijlstra Cc: Paul Mackerras Cc: Frederic Weisbecker LKML-Reference: Signed-off-by: Ingo Molnar

perf_counter, powerpc, sparc: Fix compilation after perf_counter_overflow() change

2009-09-21T07:28:40+00:00

Commit 5622f295 ("x86, perf_counter, bts: Optimize BTS overflow handling") removed the regs field from struct perf_sample_data and added a regs parameter to perf_counter_overflow(). This breaks the build on powerpc (and Sparc) as reported by Sachin Sant: arch/powerpc/kernel/perf_counter.c: In function 'record_and_restart': arch/powerpc/kernel/perf_counter.c:1165: error: unknown field 'regs' specified in initializer This adjusts arch/powerpc/kernel/perf_counter.c to correspond with the new struct perf_sample_data and perf_counter_overflow(). [ v2: also fix Sparc, Markus Metzger ] Reported-by: Sachin Sant Signed-off-by: Paul Mackerras Cc: Markus Metzger Cc: David S. Miller Cc: benh@kernel.crashing.org Cc: linuxppc-dev@ozlabs.org Cc: Peter Zijlstra LKML-Reference: <19127.8400.376239.586120@drongo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar

perf: Add a timestamp to fork events

2009-09-19T09:42:10+00:00

perf timechart needs to know when a process forked, in order to be able to visualize properly when tasks start. This patch adds a time field to the event structure, and fills it in appropriately. Signed-off-by: Arjan van de Ven Acked-by: Peter Zijlstra Cc: Paul Mackerras Cc: Frederic Weisbecker LKML-Reference: <20090912130341.51ad2de2@infradead.org> Signed-off-by: Ingo Molnar