perf evlist: Move evlist methods to evlist.c

They were on evsel.c because they came from refactoring existing evsel
methods, so, to make reviewing the changes easier, I kept it there, now
its a plain move.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 877108e4
/*
* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Parts came from builtin-{top,stat,record}.c, see those files for further
* copyright notes.
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include <poll.h>
#include "cpumap.h"
#include "thread_map.h"
#include "evlist.h"
#include "evsel.h"
#include "util.h"
#include <sys/mman.h>
#include <linux/bitops.h>
#include <linux/hash.h>
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
#define SID(e, x, y) xyarray__entry(e->id, x, y)
void perf_evlist__init(struct perf_evlist *evlist)
{
int i;
......@@ -88,6 +103,30 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
evlist->nr_fds++;
}
static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
int cpu, int thread, int fd)
{
struct perf_sample_id *sid;
u64 read_data[4] = { 0, };
int hash, id_idx = 1; /* The first entry is the counter value */
if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
read(fd, &read_data, sizeof(read_data)) == -1)
return -1;
if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
++id_idx;
if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
++id_idx;
sid = SID(evsel, cpu, thread);
sid->id = read_data[id_idx];
sid->evsel = evsel;
hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
hlist_add_head(&sid->node, &evlist->heads[hash]);
return 0;
}
struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
{
struct hlist_head *head;
......@@ -173,3 +212,106 @@ union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *evlist, int cpu)
return event;
}
void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus)
{
int cpu;
for (cpu = 0; cpu < ncpus; cpu++) {
if (evlist->mmap[cpu].base != NULL) {
munmap(evlist->mmap[cpu].base, evlist->mmap_len);
evlist->mmap[cpu].base = NULL;
}
}
}
int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus)
{
evlist->mmap = zalloc(ncpus * sizeof(struct perf_mmap));
return evlist->mmap != NULL ? 0 : -ENOMEM;
}
static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
int mask, int fd)
{
evlist->mmap[cpu].prev = 0;
evlist->mmap[cpu].mask = mask;
evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
MAP_SHARED, fd, 0);
if (evlist->mmap[cpu].base == MAP_FAILED)
return -1;
perf_evlist__add_pollfd(evlist, fd);
return 0;
}
/** perf_evlist__mmap - Create per cpu maps to receive events
*
* @evlist - list of events
* @cpus - cpu map being monitored
* @threads - threads map being monitored
* @pages - map length in pages
* @overwrite - overwrite older events?
*
* If overwrite is false the user needs to signal event consuption using:
*
* struct perf_mmap *m = &evlist->mmap[cpu];
* unsigned int head = perf_mmap__read_head(m);
*
* perf_mmap__write_tail(m, head)
*/
int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
struct thread_map *threads, int pages, bool overwrite)
{
unsigned int page_size = sysconf(_SC_PAGE_SIZE);
int mask = pages * page_size - 1, cpu;
struct perf_evsel *first_evsel, *evsel;
int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE);
if (evlist->mmap == NULL &&
perf_evlist__alloc_mmap(evlist, cpus->nr) < 0)
return -ENOMEM;
if (evlist->pollfd == NULL &&
perf_evlist__alloc_pollfd(evlist, cpus->nr, threads->nr) < 0)
return -ENOMEM;
evlist->overwrite = overwrite;
evlist->mmap_len = (pages + 1) * page_size;
first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
list_for_each_entry(evsel, &evlist->entries, node) {
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
evsel->id == NULL &&
perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
return -ENOMEM;
for (cpu = 0; cpu < cpus->nr; cpu++) {
for (thread = 0; thread < threads->nr; thread++) {
int fd = FD(evsel, cpu, thread);
if (evsel->idx || thread) {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
FD(first_evsel, cpu, 0)) != 0)
goto out_unmap;
} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
goto out_unmap;
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
goto out_unmap;
}
}
}
return 0;
out_unmap:
for (cpu = 0; cpu < cpus->nr; cpu++) {
if (evlist->mmap[cpu].base != NULL) {
munmap(evlist->mmap[cpu].base, evlist->mmap_len);
evlist->mmap[cpu].base = NULL;
}
}
return -1;
}
......@@ -6,6 +6,8 @@
#include "event.h"
struct pollfd;
struct thread_map;
struct cpu_map;
#define PERF_EVLIST__HLIST_BITS 8
#define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
......@@ -39,4 +41,9 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
union perf_event *perf_evlist__read_on_cpu(struct perf_evlist *self, int cpu);
int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
struct thread_map *threads, int pages, bool overwrite);
void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
#endif /* __PERF_EVLIST_H */
/*
* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Parts came from builtin-{top,stat,record}.c, see those files for further
* copyright notes.
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "evsel.h"
#include "evlist.h"
#include "../perf.h"
#include "util.h"
#include "cpumap.h"
#include "thread_map.h"
#include <unistd.h>
#include <sys/mman.h>
#include <linux/bitops.h>
#include <linux/hash.h>
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
#define SID(e, x, y) xyarray__entry(e->id, x, y)
void perf_evsel__init(struct perf_evsel *evsel,
struct perf_event_attr *attr, int idx)
......@@ -74,24 +75,6 @@ void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
}
}
void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus)
{
int cpu;
for (cpu = 0; cpu < ncpus; cpu++) {
if (evlist->mmap[cpu].base != NULL) {
munmap(evlist->mmap[cpu].base, evlist->mmap_len);
evlist->mmap[cpu].base = NULL;
}
}
}
int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus)
{
evlist->mmap = zalloc(ncpus * sizeof(struct perf_mmap));
return evlist->mmap != NULL ? 0 : -ENOMEM;
}
void perf_evsel__exit(struct perf_evsel *evsel)
{
assert(list_empty(&evsel->node));
......@@ -258,115 +241,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel,
return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group, inherit);
}
static int __perf_evlist__mmap(struct perf_evlist *evlist, int cpu, int prot,
int mask, int fd)
{
evlist->mmap[cpu].prev = 0;
evlist->mmap[cpu].mask = mask;
evlist->mmap[cpu].base = mmap(NULL, evlist->mmap_len, prot,
MAP_SHARED, fd, 0);
if (evlist->mmap[cpu].base == MAP_FAILED)
return -1;
perf_evlist__add_pollfd(evlist, fd);
return 0;
}
static int perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel,
int cpu, int thread, int fd)
{
struct perf_sample_id *sid;
u64 read_data[4] = { 0, };
int hash, id_idx = 1; /* The first entry is the counter value */
if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
read(fd, &read_data, sizeof(read_data)) == -1)
return -1;
if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
++id_idx;
if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
++id_idx;
sid = SID(evsel, cpu, thread);
sid->id = read_data[id_idx];
sid->evsel = evsel;
hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS);
hlist_add_head(&sid->node, &evlist->heads[hash]);
return 0;
}
/** perf_evlist__mmap - Create per cpu maps to receive events
*
* @evlist - list of events
* @cpus - cpu map being monitored
* @threads - threads map being monitored
* @pages - map length in pages
* @overwrite - overwrite older events?
*
* If overwrite is false the user needs to signal event consuption using:
*
* struct perf_mmap *m = &evlist->mmap[cpu];
* unsigned int head = perf_mmap__read_head(m);
*
* perf_mmap__write_tail(m, head)
*/
int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
struct thread_map *threads, int pages, bool overwrite)
{
unsigned int page_size = sysconf(_SC_PAGE_SIZE);
int mask = pages * page_size - 1, cpu;
struct perf_evsel *first_evsel, *evsel;
int thread, prot = PROT_READ | (overwrite ? 0 : PROT_WRITE);
if (evlist->mmap == NULL &&
perf_evlist__alloc_mmap(evlist, cpus->nr) < 0)
return -ENOMEM;
if (evlist->pollfd == NULL &&
perf_evlist__alloc_pollfd(evlist, cpus->nr, threads->nr) < 0)
return -ENOMEM;
evlist->overwrite = overwrite;
evlist->mmap_len = (pages + 1) * page_size;
first_evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
list_for_each_entry(evsel, &evlist->entries, node) {
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
evsel->id == NULL &&
perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
return -ENOMEM;
for (cpu = 0; cpu < cpus->nr; cpu++) {
for (thread = 0; thread < threads->nr; thread++) {
int fd = FD(evsel, cpu, thread);
if (evsel->idx || thread) {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT,
FD(first_evsel, cpu, 0)) != 0)
goto out_unmap;
} else if (__perf_evlist__mmap(evlist, cpu, prot, mask, fd) < 0)
goto out_unmap;
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
perf_evlist__id_hash(evlist, evsel, cpu, thread, fd) < 0)
goto out_unmap;
}
}
}
return 0;
out_unmap:
for (cpu = 0; cpu < cpus->nr; cpu++) {
if (evlist->mmap[cpu].base != NULL) {
munmap(evlist->mmap[cpu].base, evlist->mmap_len);
evlist->mmap[cpu].base = NULL;
}
}
return -1;
}
static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
struct perf_sample *sample)
{
......
......@@ -60,7 +60,6 @@ void perf_evsel__delete(struct perf_evsel *evsel);
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
void perf_evsel__free_fd(struct perf_evsel *evsel);
void perf_evsel__free_id(struct perf_evsel *evsel);
void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
......@@ -71,9 +70,6 @@ int perf_evsel__open_per_thread(struct perf_evsel *evsel,
struct thread_map *threads, bool group, bool inherit);
int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
struct thread_map *threads, bool group, bool inherit);
int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
struct thread_map *threads, int pages, bool overwrite);
void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
#define perf_evsel__match(evsel, t, c) \
(evsel->attr.type == PERF_TYPE_##t && \
......
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