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Date: Thu, 25 Sep 2014 18:57:39 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Adrian Hunter <adrian.hunter@...el.com>,
David Ahern <dsahern@...il.com>,
Don Zickus <dzickus@...hat.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 02/14] perf tests: Add test for perf_evlist__filter_pollfd()
From: Arnaldo Carvalho de Melo <acme@...hat.com>
That will use a synthetic evlist with just what is touched by this new
method to check that it works as expected.
Output in verbose mode:
$ perf test -v pollfd
33: Filter fds with revents mask in a pollfd array :
--- start ---
filtering all but pollfd[2]:
before: 5 [ 5, 4, 3, 2, 1 ]
after: 1 [ 3 ]
filtering all but (pollfd[0], pollfd[3]):
before: 5 [ 5, 4, 3, 2, 1 ]
after: 2 [ 5, 2 ]
test child finished with 0
---- end ----
Filter fds with revents mask in a pollfd array: Ok
$
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-x7c8liszdvc3ocmanf2cet8p@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/Makefile.perf | 1 +
tools/perf/tests/builtin-test.c | 4 ++
tools/perf/tests/evlist.c | 103 ++++++++++++++++++++++++++++++++++++++++
tools/perf/tests/tests.h | 1 +
4 files changed, 109 insertions(+)
create mode 100644 tools/perf/tests/evlist.c
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 171f4e65601b..f287c2522cf5 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -400,6 +400,7 @@ 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/pmu.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 6a4145e5ad2c..41e556edbe02 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -158,6 +158,10 @@ static struct test {
.func = test__switch_tracking,
},
{
+ .desc = "Filter fds with revents mask in a pollfd array",
+ .func = test__perf_evlist__filter_pollfd,
+ },
+ {
.func = NULL,
},
};
diff --git a/tools/perf/tests/evlist.c b/tools/perf/tests/evlist.c
new file mode 100644
index 000000000000..77579158f4d9
--- /dev/null
+++ b/tools/perf/tests/evlist.c
@@ -0,0 +1,103 @@
+#include "util/evlist.h"
+#include "util/debug.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;
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index be8be10e3957..72c4c039bd80 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -49,6 +49,7 @@ 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);
#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
--
1.9.3
--
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