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authorIngo Molnar <mingo@elte.hu>2009-09-21 06:02:48 -0400
committerIngo Molnar <mingo@elte.hu>2009-09-21 08:28:04 -0400
commitcdd6c482c9ff9c55475ee7392ec8f672eddb7be6 (patch)
tree81f98a3ab46c589792057fe2392c1e10f8ad7893 /init
parentdfc65094d0313cc48969fa60bcf33d693aeb05a7 (diff)
perf: Do the big rename: Performance Counters -> Performance Events
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>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig8
1 files changed, 4 insertions, 4 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 8e8b76d8a272..cfdf5c322806 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -915,17 +915,17 @@ config AIO
915 by some high performance threaded applications. Disabling 915 by some high performance threaded applications. Disabling
916 this option saves about 7k. 916 this option saves about 7k.
917 917
918config HAVE_PERF_COUNTERS 918config HAVE_PERF_EVENTS
919 bool 919 bool
920 help 920 help
921 See tools/perf/design.txt for details. 921 See tools/perf/design.txt for details.
922 922
923menu "Performance Counters" 923menu "Performance Counters"
924 924
925config PERF_COUNTERS 925config PERF_EVENTS
926 bool "Kernel Performance Counters" 926 bool "Kernel Performance Counters"
927 default y if PROFILING 927 default y if PROFILING
928 depends on HAVE_PERF_COUNTERS 928 depends on HAVE_PERF_EVENTS
929 select ANON_INODES 929 select ANON_INODES
930 help 930 help
931 Enable kernel support for performance counter hardware. 931 Enable kernel support for performance counter hardware.
@@ -947,7 +947,7 @@ config PERF_COUNTERS
947 947
948config EVENT_PROFILE 948config EVENT_PROFILE
949 bool "Tracepoint profiling sources" 949 bool "Tracepoint profiling sources"
950 depends on PERF_COUNTERS && EVENT_TRACING 950 depends on PERF_EVENTS && EVENT_TRACING
951 default y 951 default y
952 help 952 help
953 Allow the use of tracepoints as software performance counters. 953 Allow the use of tracepoints as software performance counters.