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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 /fs/exec.c
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 'fs/exec.c')
-rw-r--r--fs/exec.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 172ceb6edde4..434dba778ccc 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -33,7 +33,7 @@
33#include <linux/string.h> 33#include <linux/string.h>
34#include <linux/init.h> 34#include <linux/init.h>
35#include <linux/pagemap.h> 35#include <linux/pagemap.h>
36#include <linux/perf_counter.h> 36#include <linux/perf_event.h>
37#include <linux/highmem.h> 37#include <linux/highmem.h>
38#include <linux/spinlock.h> 38#include <linux/spinlock.h>
39#include <linux/key.h> 39#include <linux/key.h>
@@ -923,7 +923,7 @@ void set_task_comm(struct task_struct *tsk, char *buf)
923 task_lock(tsk); 923 task_lock(tsk);
924 strlcpy(tsk->comm, buf, sizeof(tsk->comm)); 924 strlcpy(tsk->comm, buf, sizeof(tsk->comm));
925 task_unlock(tsk); 925 task_unlock(tsk);
926 perf_counter_comm(tsk); 926 perf_event_comm(tsk);
927} 927}
928 928
929int flush_old_exec(struct linux_binprm * bprm) 929int flush_old_exec(struct linux_binprm * bprm)
@@ -997,7 +997,7 @@ int flush_old_exec(struct linux_binprm * bprm)
997 * security domain: 997 * security domain:
998 */ 998 */
999 if (!get_dumpable(current->mm)) 999 if (!get_dumpable(current->mm))
1000 perf_counter_exit_task(current); 1000 perf_event_exit_task(current);
1001 1001
1002 /* An exec changes our domain. We are no longer part of the thread 1002 /* An exec changes our domain. We are no longer part of the thread
1003 group */ 1003 group */