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From: Zorro Lang <[email protected]>
To: [email protected]
Cc: [email protected], [email protected]
Subject: [PATCH v4 2/5] fsstress: reduce the number of events when io_setup
Date: Mon,  7 Sep 2020 01:55:10 +0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

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 <[email protected]>
---
 ltp/fsstress.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ltp/fsstress.c b/ltp/fsstress.c
index 2c584ef0..b4a51376 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


  parent reply	other threads:[~2020-09-06 17:55 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-06 17:55 [PATCH v4 0/5] fsstress,fsx: add io_uring test and do some fix Zorro Lang
2020-09-06 17:55 ` [PATCH v4 1/5] fsstress: add IO_URING read and write operations Zorro Lang
2020-09-08 18:34   ` Brian Foster
2020-09-06 17:55 ` Zorro Lang [this message]
2020-09-08 18:34   ` [PATCH v4 2/5] fsstress: reduce the number of events when io_setup Brian Foster
2020-09-06 17:55 ` [PATCH v4 3/5] fsstress: fix memory leak in do_aio_rw Zorro Lang
2020-09-08 18:35   ` Brian Foster
2020-09-06 17:55 ` [PATCH v4 4/5] fsx: introduce fsx_rw to combine aio_rw with general read and write Zorro Lang
2020-09-08 18:35   ` Brian Foster
2020-09-06 17:55 ` [PATCH v4 5/5] fsx: add IO_URING test Zorro Lang
2020-09-08 18:36   ` Brian Foster
2020-09-09  3:58     ` Zorro Lang

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