[PATCH 53/66] libperf: Add perf_evlist__add_pollfd() function

Arnaldo Carvalho de Melo
2019-09-26T00:36:17Z

Move perf_evlist__add_pollfd() from tools/perf to libperf, it will be
used in the following patches.

Also rename perf's perf_evlist__add_pollfd()/perf_evlist__filter_pollfd()
to evlist__add_pollfd()/evlist__filter_pollfd().

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-38-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-kvm.c | 4 ++--
tools/perf/builtin-record.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/evlist.c | 16 +++++++++++++++
tools/perf/lib/include/internal/evlist.h | 2 ++
tools/perf/util/evlist.c | 25 ++++--------------------
tools/perf/util/evlist.h | 4 ++--
7 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 710a2898ed6c..2227e2f42c09 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -967,10 +967,10 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
goto out;
}

- if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
+ if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
goto out;

- nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
+ nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin));
if (nr_stdin < 0)
goto out;

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 48600c90cc7e..d6daaad348b5 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1624,7 +1624,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
err = 0;
waking++;

- if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
+ if (evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
draining = true;
}

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 97667287f573..8d9784b5d028 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3475,7 +3475,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
int timeout = done ? 100 : -1;

if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
- if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
+ if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
draining = true;

goto again;
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 3c3b97f40be0..e4d8b3b7b8fc 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -12,6 +12,9 @@
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <poll.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <api/fd/array.h>
@@ -260,3 +263,16 @@ int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)

return 0;
}
+
+int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
+ void *ptr, short revent)
+{
+ int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP);
+
+ if (pos >= 0) {
+ evlist->pollfd.priv[pos].ptr = ptr;
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ }
+
+ return pos;
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 88c0dfaf0ddc..9f440ab12b76 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -25,6 +25,8 @@ struct perf_evlist {
};

int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
+int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
+ void *ptr, short revent);

/**
* __perf_evlist__for_each_entry - iterate thru all the evsels
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index c47f23e7f3c8..051be9a31db9 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -398,26 +398,9 @@ int perf_evlist__enable_event_idx(struct evlist *evlist,
return perf_evlist__enable_event_thread(evlist, evsel, idx);
}

-static int __perf_evlist__add_pollfd(struct evlist *evlist, int fd,
- struct mmap *map, short revent)
+int evlist__add_pollfd(struct evlist *evlist, int fd)
{
- int pos = fdarray__add(&evlist->core.pollfd, fd, revent | POLLERR | POLLHUP);
- /*
- * Save the idx so that when we filter out fds POLLHUP'ed we can
- * close the associated evlist->mmap[] entry.
- */
- if (pos >= 0) {
- evlist->core.pollfd.priv[pos].ptr = map;
-
- fcntl(fd, F_SETFL, O_NONBLOCK);
- }
-
- return pos;
-}
-
-int perf_evlist__add_pollfd(struct evlist *evlist, int fd)
-{
- return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN);
+ return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN);
}

static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
@@ -429,7 +412,7 @@ static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
perf_mmap__put(map);
}

-int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
+int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
{
return fdarray__filter(&evlist->core.pollfd, revents_and_mask,
perf_evlist__munmap_filtered, NULL);
@@ -708,7 +691,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
* Therefore don't add it for polling.
*/
if (!evsel->core.system_wide &&
- __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) {
+ perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
perf_mmap__put(&maps[idx]);
return -1;
}
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index bebbaa9b6325..2eac8aab24a3 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -141,8 +141,8 @@ struct evsel *
perf_evlist__find_tracepoint_by_name(struct evlist *evlist,
const char *name);

-int perf_evlist__add_pollfd(struct evlist *evlist, int fd);
-int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);
+int evlist__add_pollfd(struct evlist *evlist, int fd);
+int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);

int perf_evlist__poll(struct evlist *evlist, int timeout);

--
2.21.0