[PATCH v3 2/4] fsstress: reduce the number of events when io_setup

Zorro Lang
2020-08-23T06:30:58Z

The original number(128) of aio events for io_setup too big. When try
to run lots of fsstress processes(e.g. -p 1000) always hit io_setup
EAGAIN error, due to the nr_events exceeds the limit of available
events. Due to each fsstress process only does once libaio read/write
operation each time. So reduce the aio events number to 1, to make more
fsstress processes can do AIO test.

Signed-off-by: Zorro Lang <zlang@redhat.com>
---
ltp/fsstress.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ltp/fsstress.c b/ltp/fsstress.c
index 7a0e278a..ef2017a8 100644
--- a/ltp/fsstress.c
+++ b/ltp/fsstress.c
@@ -28,6 +28,7 @@
#endif
#ifdef AIO
#include <libaio.h>
+#define AIO_ENTRIES 1
io_context_t io_ctx;
#endif
#ifdef URING
@@ -699,8 +700,8 @@ int main(int argc, char **argv)
}
procid = i;
#ifdef AIO
- if (io_setup(128, &io_ctx) != 0) {
- fprintf(stderr, "io_setup failed");
+ if (io_setup(AIO_ENTRIES, &io_ctx) != 0) {
+ fprintf(stderr, "io_setup failed\n");
exit(1);
}
#endif
--
2.20.1