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tools lib api: Adopt fdarray class from perf's evlist

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The extensible file description array that grew in the perf_evlist class
can be useful for other tools, as it is not something that only evlists
need, so move it to tools/lib/api/fd to ease sharing it.

v2: Don't use {} like in:

 libapi_dirs:
	$(QUIET_MKDIR)mkdir -p $(OUTPUT){fs,fd}/

in Makefiles, as it will not work in some systems, as in ubuntu13.10.

v3: Add fd/*.[ch] to LIBAPIKFS_SOURCES (Fix from Jiri Olsa)

v4: Leave the fcntl(fd, O_NONBLOCK) in the evlist layer, remains to
    be checked if it is really needed there, but has no place in the
    fdarray class (Fix from Jiri Olsa)

v5: Remove evlist details from fdarray grow/filter tests. Improve it a
    bit doing more tests about expected internal state.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-kleuni3hckbc3s0lu6yb9x40@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2014-09-03 18:02:59 -03:00
parent f66a889dbc
commit 1b85337d06
12 changed files with 342 additions and 278 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
tools/lib/api/Makefile
View File

@ -10,9 +10,14 @@ LIB_OBJS=
LIB_H += fs/debugfs.h
LIB_H += fs/fs.h
# See comment below about piggybacking...
LIB_H += fd/array.h
LIB_OBJS += $(OUTPUT)fs/debugfs.o
LIB_OBJS += $(OUTPUT)fs/fs.o
# XXX piggybacking here, need to introduce libapikfd, or rename this
# to plain libapik.a and make it have it all api goodies
LIB_OBJS += $(OUTPUT)fd/array.o
LIBFILE = libapikfs.a
@ -29,7 +34,7 @@ $(LIBFILE): $(LIB_OBJS)
$(LIB_OBJS): $(LIB_H)
libapi_dirs:
$(QUIET_MKDIR)mkdir -p $(OUTPUT)fs/
$(QUIET_MKDIR)mkdir -p $(OUTPUT)fd $(OUTPUT)fs
$(OUTPUT)%.o: %.c libapi_dirs
$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $<

107
tools/lib/api/fd/array.c Normal file
View File

@ -0,0 +1,107 @@
/*
* Copyright (C) 2014, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "array.h"
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdlib.h>
#include <unistd.h>
void fdarray__init(struct fdarray *fda, int nr_autogrow)
{
fda->entries = NULL;
fda->nr = fda->nr_alloc = 0;
fda->nr_autogrow = nr_autogrow;
}
int fdarray__grow(struct fdarray *fda, int nr)
{
int nr_alloc = fda->nr_alloc + nr;
size_t size = sizeof(struct pollfd) * nr_alloc;
struct pollfd *entries = realloc(fda->entries, size);
if (entries == NULL)
return -ENOMEM;
fda->nr_alloc = nr_alloc;
fda->entries = entries;
return 0;
}
struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow)
{
struct fdarray *fda = calloc(1, sizeof(*fda));
if (fda != NULL) {
if (fdarray__grow(fda, nr_alloc)) {
free(fda);
fda = NULL;
} else {
fda->nr_autogrow = nr_autogrow;
}
}
return fda;
}
void fdarray__exit(struct fdarray *fda)
{
free(fda->entries);
fdarray__init(fda, 0);
}
void fdarray__delete(struct fdarray *fda)
{
fdarray__exit(fda);
free(fda);
}
int fdarray__add(struct fdarray *fda, int fd, short revents)
{
if (fda->nr == fda->nr_alloc &&
fdarray__grow(fda, fda->nr_autogrow) < 0)
return -ENOMEM;
fda->entries[fda->nr].fd = fd;
fda->entries[fda->nr].events = revents;
fda->nr++;
return 0;
}
int fdarray__filter(struct fdarray *fda, short revents)
{
int fd, nr = 0;
if (fda->nr == 0)
return 0;
for (fd = 0; fd < fda->nr; ++fd) {
if (fda->entries[fd].revents & revents)
continue;
if (fd != nr)
fda->entries[nr] = fda->entries[fd];
++nr;
}
return fda->nr = nr;
}
int fdarray__poll(struct fdarray *fda, int timeout)
{
return poll(fda->entries, fda->nr, timeout);
}
int fdarray__fprintf(struct fdarray *fda, FILE *fp)
{
int fd, printed = fprintf(fp, "%d [ ", fda->nr);
for (fd = 0; fd < fda->nr; ++fd)
printed += fprintf(fp, "%s%d", fd ? ", " : "", fda->entries[fd].fd);
return printed + fprintf(fp, " ]");
}

32
tools/lib/api/fd/array.h Normal file
View File

@ -0,0 +1,32 @@
#ifndef __API_FD_ARRAY__
#define __API_FD_ARRAY__
#include <stdio.h>
struct pollfd;
struct fdarray {
int nr;
int nr_alloc;
int nr_autogrow;
struct pollfd *entries;
};
void fdarray__init(struct fdarray *fda, int nr_autogrow);
void fdarray__exit(struct fdarray *fda);
struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow);
void fdarray__delete(struct fdarray *fda);
int fdarray__add(struct fdarray *fda, int fd, short revents);
int fdarray__poll(struct fdarray *fda, int timeout);
int fdarray__filter(struct fdarray *fda, short revents);
int fdarray__grow(struct fdarray *fda, int extra);
int fdarray__fprintf(struct fdarray *fda, FILE *fp);
static inline int fdarray__available_entries(struct fdarray *fda)
{
return fda->nr_alloc - fda->nr;
}
#endif /* __API_FD_ARRAY__ */

4
tools/perf/Makefile.perf
View File

@ -400,9 +400,9 @@ LIB_OBJS += $(OUTPUT)tests/open-syscall-tp-fields.o
LIB_OBJS += $(OUTPUT)tests/mmap-basic.o
LIB_OBJS += $(OUTPUT)tests/perf-record.o
LIB_OBJS += $(OUTPUT)tests/rdpmc.o
LIB_OBJS += $(OUTPUT)tests/evlist.o
LIB_OBJS += $(OUTPUT)tests/evsel-roundtrip-name.o
LIB_OBJS += $(OUTPUT)tests/evsel-tp-sched.o
LIB_OBJS += $(OUTPUT)tests/fdarray.o
LIB_OBJS += $(OUTPUT)tests/pmu.o
LIB_OBJS += $(OUTPUT)tests/hists_common.o
LIB_OBJS += $(OUTPUT)tests/hists_link.o
@ -770,7 +770,7 @@ $(LIBTRACEEVENT)-clean:
install-traceevent-plugins: $(LIBTRACEEVENT)
$(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(LIBTRACEEVENT_FLAGS) install_plugins
LIBAPIKFS_SOURCES = $(wildcard $(LIB_PATH)fs/*.[ch])
LIBAPIKFS_SOURCES = $(wildcard $(LIB_PATH)fs/*.[ch] $(LIB_PATH)fd/*.[ch])
# if subdir is set, we've been called from above so target has been built
# already

4
tools/perf/builtin-kvm.c
View File

@ -920,7 +920,7 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
signal(SIGTERM, sig_handler);
/* use pollfds -- need to add timerfd and stdin */
nr_fds = kvm->evlist->nr_fds;
nr_fds = kvm->evlist->pollfd.nr;
/* add timer fd */
if (perf_kvm__timerfd_create(kvm) < 0) {
@ -941,7 +941,7 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
if (fd_set_nonblock(fileno(stdin)) != 0)
goto out;
pollfds = kvm->evlist->pollfd;
pollfds = kvm->evlist->pollfd.entries;
/* everything is good - enable the events and process */
perf_evlist__enable(kvm->evlist);

8
tools/perf/tests/builtin-test.c
View File

@ -158,12 +158,12 @@ static struct test {
.func = test__switch_tracking,
},
{
.desc = "Filter fds with revents mask in a pollfd array",
.func = test__perf_evlist__filter_pollfd,
.desc = "Filter fds with revents mask in a fdarray",
.func = test__fdarray__filter,
},
{
.desc = "Add fd to pollfd array, making it autogrow",
.func = test__perf_evlist__add_pollfd,
.desc = "Add fd to a fdarray, making it autogrow",
.func = test__fdarray__add,
},
{
.func = NULL,

214
tools/perf/tests/evlist.c
View File

@ -1,214 +0,0 @@
#include "util/evlist.h"
#include "util/debug.h"
#include "util/thread_map.h"
#include "util/cpumap.h"
#include "tests/tests.h"
static void perf_evlist__init_pollfd(struct perf_evlist *evlist,
int nr_fds_alloc, short revents)
{
int fd;
evlist->nr_fds = nr_fds_alloc;
for (fd = 0; fd < nr_fds_alloc; ++fd) {
evlist->pollfd[fd].fd = nr_fds_alloc - fd;
evlist->pollfd[fd].revents = revents;
}
}
static int perf_evlist__fprintf_pollfd(struct perf_evlist *evlist,
const char *prefix, FILE *fp)
{
int printed = 0, fd;
if (!verbose)
return 0;
printed += fprintf(fp, "\n%s: %3d [ ", prefix, evlist->nr_fds);
for (fd = 0; fd < evlist->nr_fds; ++fd)
printed += fprintf(fp, "%s%d", fd ? ", " : "", evlist->pollfd[fd].fd);
printed += fprintf(fp, " ]");
return printed;
}
int test__perf_evlist__filter_pollfd(void)
{
const int nr_fds_alloc = 5;
int nr_fds, expected_fd[2], fd;
struct pollfd pollfd[nr_fds_alloc];
struct perf_evlist evlist_alloc = {
.pollfd = pollfd,
}, *evlist = &evlist_alloc;
perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLIN);
nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
if (nr_fds != nr_fds_alloc) {
pr_debug("\nperf_evlist__filter_pollfd()=%d != %d shouldn't have filtered anything",
nr_fds, nr_fds_alloc);
return TEST_FAIL;
}
perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
if (nr_fds != 0) {
pr_debug("\nperf_evlist__filter_pollfd()=%d != %d, should have filtered all fds",
nr_fds, nr_fds_alloc);
return TEST_FAIL;
}
perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
pollfd[2].revents = POLLIN;
expected_fd[0] = pollfd[2].fd;
pr_debug("\nfiltering all but pollfd[2]:");
perf_evlist__fprintf_pollfd(evlist, "before", stderr);
nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
perf_evlist__fprintf_pollfd(evlist, " after", stderr);
if (nr_fds != 1) {
pr_debug("\nperf_evlist__filter_pollfd()=%d != 1, should have left just one event",
nr_fds);
return TEST_FAIL;
}
if (pollfd[0].fd != expected_fd[0]) {
pr_debug("\npollfd[0].fd=%d != %d\n", pollfd[0].fd, expected_fd[0]);
return TEST_FAIL;
}
perf_evlist__init_pollfd(evlist, nr_fds_alloc, POLLHUP);
pollfd[0].revents = POLLIN;
expected_fd[0] = pollfd[0].fd;
pollfd[3].revents = POLLIN;
expected_fd[1] = pollfd[3].fd;
pr_debug("\nfiltering all but (pollfd[0], pollfd[3]):");
perf_evlist__fprintf_pollfd(evlist, "before", stderr);
nr_fds = perf_evlist__filter_pollfd(evlist, POLLHUP);
perf_evlist__fprintf_pollfd(evlist, " after", stderr);
if (nr_fds != 2) {
pr_debug("\nperf_evlist__filter_pollfd()=%d != 2, should have left just two events",
nr_fds);
return TEST_FAIL;
}
for (fd = 0; fd < 2; ++fd) {
if (pollfd[fd].fd != expected_fd[fd]) {
pr_debug("\npollfd[%d].fd=%d != %d\n", fd, pollfd[fd].fd, expected_fd[fd]);
return TEST_FAIL;
}
}
pr_debug("\n");
return 0;
}
int test__perf_evlist__add_pollfd(void)
{
struct perf_evsel evsel = {
.system_wide = false,
};
struct thread_map threads = {
.nr = 2,
};
struct perf_evlist evlist_alloc = {
.pollfd = NULL,
.threads = &threads,
}, *evlist = &evlist_alloc;
INIT_LIST_HEAD(&evlist->entries);
list_add(&evsel.node, &evlist->entries);
if (perf_evlist__alloc_pollfd(evlist) < 0) {
pr_debug("\nperf_evlist__alloc_pollfd(evlist) failed!");
return TEST_FAIL;
}
if (evlist->nr_fds_alloc != threads.nr) {
pr_debug("\n_evlist__alloc_pollfd: nr_fds_alloc=%d != (threads->nr(%d) * cpu_map->nr(%d))=%d",
evlist->nr_fds_alloc, thread_map__nr(evlist->threads), cpu_map__nr(evlist->cpus),
thread_map__nr(evlist->threads) * cpu_map__nr(evlist->cpus));
return TEST_FAIL;
}
if (perf_evlist__add_pollfd(evlist, 1) < 0) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 1) failed!");
return TEST_FAIL;
}
if (evlist->nr_fds != 1) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 1)=%d != 1", evlist->nr_fds);
return TEST_FAIL;
}
if (perf_evlist__add_pollfd(evlist, 2) < 0) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 2) failed!");
return TEST_FAIL;
}
if (evlist->nr_fds != 2) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 2)=%d != 2", evlist->nr_fds);
return TEST_FAIL;
}
perf_evlist__fprintf_pollfd(evlist, "before growing array", stderr);
if (perf_evlist__add_pollfd(evlist, 35) < 0) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 35) failed!");
return TEST_FAIL;
}
if (evlist->nr_fds != 3) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 35)=%d != 3", evlist->nr_fds);
return TEST_FAIL;
}
if (evlist->pollfd == NULL) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 35) should have allocated evlist->pollfd!");
return TEST_FAIL;
}
perf_evlist__fprintf_pollfd(evlist, "after 3rd add_pollfd", stderr);
if (evlist->pollfd[2].fd != 35) {
pr_debug("\nevlist->pollfd[2](%d) != 35!", evlist->pollfd[2].fd);
return TEST_FAIL;
}
if (perf_evlist__add_pollfd(evlist, 88) < 0) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 88) failed!");
return TEST_FAIL;
}
if (evlist->nr_fds != 4) {
pr_debug("\nperf_evlist__add_pollfd(evlist, 88)=%d != 2", evlist->nr_fds);
return TEST_FAIL;
}
perf_evlist__fprintf_pollfd(evlist, "after 4th add_pollfd", stderr);
if (evlist->pollfd[0].fd != 1) {
pr_debug("\nevlist->pollfd[0](%d) != 1!", evlist->pollfd[0].fd);
return TEST_FAIL;
}
if (evlist->pollfd[1].fd != 2) {
pr_debug("\nevlist->pollfd[1](%d) != 2!", evlist->pollfd[1].fd);
return TEST_FAIL;
}
if (evlist->pollfd[2].fd != 35) {
pr_debug("\nevlist->pollfd[2](%d) != 35!", evlist->pollfd[2].fd);
return TEST_FAIL;
}
if (evlist->pollfd[3].fd != 88) {
pr_debug("\nevlist->pollfd[3](%d) != 88!", evlist->pollfd[3].fd);
return TEST_FAIL;
}
pr_debug("\n");
return 0;
}

174
tools/perf/tests/fdarray.c Normal file
View File

@ -0,0 +1,174 @@
#include <api/fd/array.h>
#include "util/debug.h"
#include "tests/tests.h"
static void fdarray__init_revents(struct fdarray *fda, short revents)
{
int fd;
fda->nr = fda->nr_alloc;
for (fd = 0; fd < fda->nr; ++fd) {
fda->entries[fd].fd = fda->nr - fd;
fda->entries[fd].revents = revents;
}
}
static int fdarray__fprintf_prefix(struct fdarray *fda, const char *prefix, FILE *fp)
{
int printed = 0;
if (!verbose)
return 0;
printed += fprintf(fp, "\n%s: ", prefix);
return printed + fdarray__fprintf(fda, fp);
}
int test__fdarray__filter(void)
{
int nr_fds, expected_fd[2], fd, err = TEST_FAIL;
struct fdarray *fda = fdarray__new(5, 5);
if (fda == NULL) {
pr_debug("\nfdarray__new() failed!");
goto out;
}
fdarray__init_revents(fda, POLLIN);
nr_fds = fdarray__filter(fda, POLLHUP);
if (nr_fds != fda->nr_alloc) {
pr_debug("\nfdarray__filter()=%d != %d shouldn't have filtered anything",
nr_fds, fda->nr_alloc);
goto out_delete;
}
fdarray__init_revents(fda, POLLHUP);
nr_fds = fdarray__filter(fda, POLLHUP);
if (nr_fds != 0) {
pr_debug("\nfdarray__filter()=%d != %d, should have filtered all fds",
nr_fds, fda->nr_alloc);
goto out_delete;
}
fdarray__init_revents(fda, POLLHUP);
fda->entries[2].revents = POLLIN;
expected_fd[0] = fda->entries[2].fd;
pr_debug("\nfiltering all but fda->entries[2]:");
fdarray__fprintf_prefix(fda, "before", stderr);
nr_fds = fdarray__filter(fda, POLLHUP);
fdarray__fprintf_prefix(fda, " after", stderr);
if (nr_fds != 1) {
pr_debug("\nfdarray__filter()=%d != 1, should have left just one event", nr_fds);
goto out_delete;
}
if (fda->entries[0].fd != expected_fd[0]) {
pr_debug("\nfda->entries[0].fd=%d != %d\n",
fda->entries[0].fd, expected_fd[0]);
goto out_delete;
}
fdarray__init_revents(fda, POLLHUP);
fda->entries[0].revents = POLLIN;
expected_fd[0] = fda->entries[0].fd;
fda->entries[3].revents = POLLIN;
expected_fd[1] = fda->entries[3].fd;
pr_debug("\nfiltering all but (fda->entries[0], fda->entries[3]):");
fdarray__fprintf_prefix(fda, "before", stderr);
nr_fds = fdarray__filter(fda, POLLHUP);
fdarray__fprintf_prefix(fda, " after", stderr);
if (nr_fds != 2) {
pr_debug("\nfdarray__filter()=%d != 2, should have left just two events",
nr_fds);
goto out_delete;
}
for (fd = 0; fd < 2; ++fd) {
if (fda->entries[fd].fd != expected_fd[fd]) {
pr_debug("\nfda->entries[%d].fd=%d != %d\n", fd,
fda->entries[fd].fd, expected_fd[fd]);
goto out_delete;
}
}
pr_debug("\n");
err = 0;
out_delete:
fdarray__delete(fda);
out:
return err;
}
int test__fdarray__add(void)
{
int err = TEST_FAIL;
struct fdarray *fda = fdarray__new(2, 2);
if (fda == NULL) {
pr_debug("\nfdarray__new() failed!");
goto out;
}
#define FDA_CHECK(_idx, _fd, _revents) \
if (fda->entries[_idx].fd != _fd) { \
pr_debug("\n%d: fda->entries[%d](%d) != %d!", \
__LINE__, _idx, fda->entries[1].fd, _fd); \
goto out_delete; \
} \
if (fda->entries[_idx].events != (_revents)) { \
pr_debug("\n%d: fda->entries[%d].revents(%d) != %d!", \
__LINE__, _idx, fda->entries[_idx].fd, _revents); \
goto out_delete; \
}
#define FDA_ADD(_idx, _fd, _revents, _nr) \
if (fdarray__add(fda, _fd, _revents) < 0) { \
pr_debug("\n%d: fdarray__add(fda, %d, %d) failed!", \
__LINE__,_fd, _revents); \
goto out_delete; \
} \
if (fda->nr != _nr) { \
pr_debug("\n%d: fdarray__add(fda, %d, %d)=%d != %d", \
__LINE__,_fd, _revents, fda->nr, _nr); \
goto out_delete; \
} \
FDA_CHECK(_idx, _fd, _revents)
FDA_ADD(0, 1, POLLIN, 1);
FDA_ADD(1, 2, POLLERR, 2);
fdarray__fprintf_prefix(fda, "before growing array", stderr);
FDA_ADD(2, 35, POLLHUP, 3);
if (fda->entries == NULL) {
pr_debug("\nfdarray__add(fda, 35, POLLHUP) should have allocated fda->pollfd!");
goto out_delete;
}
fdarray__fprintf_prefix(fda, "after 3rd add", stderr);
FDA_ADD(3, 88, POLLIN | POLLOUT, 4);
fdarray__fprintf_prefix(fda, "after 4th add", stderr);
FDA_CHECK(0, 1, POLLIN);
FDA_CHECK(1, 2, POLLERR);
FDA_CHECK(2, 35, POLLHUP);
FDA_CHECK(3, 88, POLLIN | POLLOUT);
#undef FDA_ADD
#undef FDA_CHECK
pr_debug("\n");
err = 0;
out_delete:
fdarray__delete(fda);
out:
return err;
}

4
tools/perf/tests/tests.h
View File

@ -49,8 +49,8 @@ int test__thread_mg_share(void);
int test__hists_output(void);
int test__hists_cumulate(void);
int test__switch_tracking(void);
int test__perf_evlist__filter_pollfd(void);
int test__perf_evlist__add_pollfd(void);
int test__fdarray__filter(void);
int test__fdarray__add(void);
#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT

57
tools/perf/util/evlist.c
View File

@ -37,6 +37,7 @@ void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
INIT_HLIST_HEAD(&evlist->heads[i]);
INIT_LIST_HEAD(&evlist->entries);
perf_evlist__set_maps(evlist, cpus, threads);
fdarray__init(&evlist->pollfd, 64);
evlist->workload.pid = -1;
}
@ -102,7 +103,7 @@ static void perf_evlist__purge(struct perf_evlist *evlist)
void perf_evlist__exit(struct perf_evlist *evlist)
{
zfree(&evlist->mmap);
zfree(&evlist->pollfd);
fdarray__exit(&evlist->pollfd);
}
void perf_evlist__delete(struct perf_evlist *evlist)
@ -402,20 +403,6 @@ int perf_evlist__enable_event_idx(struct perf_evlist *evlist,
return perf_evlist__enable_event_thread(evlist, evsel, idx);
}
static int perf_evlist__grow_pollfd(struct perf_evlist *evlist, int hint)
{
int nr_fds_alloc = evlist->nr_fds_alloc + hint;
size_t size = sizeof(struct pollfd) * nr_fds_alloc;
struct pollfd *pollfd = realloc(evlist->pollfd, size);
if (pollfd == NULL)
return -ENOMEM;
evlist->nr_fds_alloc = nr_fds_alloc;
evlist->pollfd = pollfd;
return 0;
}
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
{
int nr_cpus = cpu_map__nr(evlist->cpus);
@ -430,8 +417,8 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
nfds += nr_cpus * nr_threads;
}
if (evlist->nr_fds_alloc - evlist->nr_fds < nfds &&
perf_evlist__grow_pollfd(evlist, nfds) < 0)
if (fdarray__available_entries(&evlist->pollfd) < nfds &&
fdarray__grow(&evlist->pollfd, nfds) < 0)
return -ENOMEM;
return 0;
@ -439,45 +426,19 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd)
{
/*
* XXX: 64 is arbitrary, just not to call realloc at each fd.
* Find a better autogrowing heuristic
*/
if (evlist->nr_fds == evlist->nr_fds_alloc &&
perf_evlist__grow_pollfd(evlist, 64) < 0)
return -ENOMEM;
fcntl(fd, F_SETFL, O_NONBLOCK);
evlist->pollfd[evlist->nr_fds].fd = fd;
evlist->pollfd[evlist->nr_fds].events = POLLIN | POLLERR | POLLHUP;
evlist->nr_fds++;
return 0;
return fdarray__add(&evlist->pollfd, fd, POLLIN | POLLERR | POLLHUP);
}
int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
{
int fd, nr_fds = 0;
if (evlist->nr_fds == 0)
return 0;
for (fd = 0; fd < evlist->nr_fds; ++fd) {
if (evlist->pollfd[fd].revents & revents_and_mask)
continue;
if (fd != nr_fds)
evlist->pollfd[nr_fds] = evlist->pollfd[fd];
++nr_fds;
}
evlist->nr_fds = nr_fds;
return nr_fds;
return fdarray__filter(&evlist->pollfd, revents_and_mask);
}
int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
{
return poll(evlist->pollfd, evlist->nr_fds, timeout);
return fdarray__poll(&evlist->pollfd, timeout);
}
static void perf_evlist__id_hash(struct perf_evlist *evlist,
@ -935,7 +896,7 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0)
return -ENOMEM;
if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
return -ENOMEM;
evlist->overwrite = overwrite;

5
tools/perf/util/evlist.h
View File

@ -2,6 +2,7 @@
#define __PERF_EVLIST_H 1
#include <linux/list.h>
#include <api/fd/array.h>
#include <stdio.h>
#include "../perf.h"
#include "event.h"
@ -29,8 +30,6 @@ struct perf_evlist {
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
int nr_entries;
int nr_groups;
int nr_fds;
int nr_fds_alloc;
int nr_mmaps;
size_t mmap_len;
int id_pos;
@ -41,8 +40,8 @@ struct perf_evlist {
pid_t pid;
} workload;
bool overwrite;
struct fdarray pollfd;
struct perf_mmap *mmap;
struct pollfd *pollfd;
struct thread_map *threads;
struct cpu_map *cpus;
struct perf_evsel *selected;

4
tools/perf/util/python.c
View File

@ -753,9 +753,9 @@ static PyObject *pyrf_evlist__get_pollfd(struct pyrf_evlist *pevlist,
PyObject *list = PyList_New(0);
int i;
for (i = 0; i < evlist->nr_fds; ++i) {
for (i = 0; i < evlist->pollfd.nr; ++i) {
PyObject *file;
FILE *fp = fdopen(evlist->pollfd[i].fd, "r");
FILE *fp = fdopen(evlist->pollfd.entries[i].fd, "r");
if (fp == NULL)
goto free_list;