mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 11:32:04 +00:00
cdd6c482c9
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>
105 lines
1.8 KiB
C
105 lines
1.8 KiB
C
#ifndef __PERF_RECORD_H
|
|
#define __PERF_RECORD_H
|
|
#include "../perf.h"
|
|
#include "util.h"
|
|
#include <linux/list.h>
|
|
|
|
enum {
|
|
SHOW_KERNEL = 1,
|
|
SHOW_USER = 2,
|
|
SHOW_HV = 4,
|
|
};
|
|
|
|
/*
|
|
* PERF_SAMPLE_IP | PERF_SAMPLE_TID | *
|
|
*/
|
|
struct ip_event {
|
|
struct perf_event_header header;
|
|
u64 ip;
|
|
u32 pid, tid;
|
|
unsigned char __more_data[];
|
|
};
|
|
|
|
struct mmap_event {
|
|
struct perf_event_header header;
|
|
u32 pid, tid;
|
|
u64 start;
|
|
u64 len;
|
|
u64 pgoff;
|
|
char filename[PATH_MAX];
|
|
};
|
|
|
|
struct comm_event {
|
|
struct perf_event_header header;
|
|
u32 pid, tid;
|
|
char comm[16];
|
|
};
|
|
|
|
struct fork_event {
|
|
struct perf_event_header header;
|
|
u32 pid, ppid;
|
|
u32 tid, ptid;
|
|
u64 time;
|
|
};
|
|
|
|
struct lost_event {
|
|
struct perf_event_header header;
|
|
u64 id;
|
|
u64 lost;
|
|
};
|
|
|
|
/*
|
|
* PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID
|
|
*/
|
|
struct read_event {
|
|
struct perf_event_header header;
|
|
u32 pid, tid;
|
|
u64 value;
|
|
u64 time_enabled;
|
|
u64 time_running;
|
|
u64 id;
|
|
};
|
|
|
|
struct sample_event{
|
|
struct perf_event_header header;
|
|
u64 array[];
|
|
};
|
|
|
|
|
|
typedef union event_union {
|
|
struct perf_event_header header;
|
|
struct ip_event ip;
|
|
struct mmap_event mmap;
|
|
struct comm_event comm;
|
|
struct fork_event fork;
|
|
struct lost_event lost;
|
|
struct read_event read;
|
|
struct sample_event sample;
|
|
} event_t;
|
|
|
|
struct map {
|
|
struct list_head node;
|
|
u64 start;
|
|
u64 end;
|
|
u64 pgoff;
|
|
u64 (*map_ip)(struct map *, u64);
|
|
struct dso *dso;
|
|
};
|
|
|
|
static inline u64 map__map_ip(struct map *map, u64 ip)
|
|
{
|
|
return ip - map->start + map->pgoff;
|
|
}
|
|
|
|
static inline u64 vdso__map_ip(struct map *map __used, u64 ip)
|
|
{
|
|
return ip;
|
|
}
|
|
|
|
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
|
|
struct map *map__clone(struct map *self);
|
|
int map__overlap(struct map *l, struct map *r);
|
|
size_t map__fprintf(struct map *self, FILE *fp);
|
|
|
|
#endif
|