* [PATCH blktests v2] block/020: dynamically change iodepth if test aio-nr lager than aio-max-nr
@ 2019-04-06 14:27 Xiao Liang
2019-04-17 21:41 ` Omar Sandoval
0 siblings, 1 reply; 2+ messages in thread
From: Xiao Liang @ 2019-04-06 14:27 UTC (permalink / raw)
To: linux-block, osandov; +Cc: xiliang
When system has large count of cpus(eg. 96), the test failed as aio-nr over
aio-max-nr limitation.
This patch continues to use 1024 as default iodepth, but change it if
iodepth*$(nproc) > aio-max-nr.
Signed-off-by: Xiao Liang <xiliang@redhat.com>
---
tests/block/020 | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tests/block/020 b/tests/block/020
index 39dde66..6583a3f 100755
--- a/tests/block/020
+++ b/tests/block/020
@@ -29,10 +29,16 @@ test() {
# shellcheck disable=SC2207
scheds=($(sed 's/[][]//g' /sys/block/nullb0/queue/scheduler))
+ aio_max_nr=$(cat /proc/sys/fs/aio-max-nr)
+ max_iodepth=$((aio_max_nr/$(nproc)))
+ iodepth=1024
+ if (( iodepth > max_iodepth )); then
+ iodepth=$max_iodepth
+ fi
for sched in "${scheds[@]}"; do
echo "Testing $sched" >> "$FULL"
echo "$sched" > /sys/block/nullb0/queue/scheduler
- _fio_perf --bs=4k --ioengine=libaio --iodepth=1024 \
+ _fio_perf --bs=4k --ioengine=libaio --iodepth=$iodepth \
--numjobs="$(nproc)" --rw=randread --name=async \
--filename=/dev/nullb0 --size=1g --direct=1 \
--runtime=10
--
2.17.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH blktests v2] block/020: dynamically change iodepth if test aio-nr lager than aio-max-nr
2019-04-06 14:27 [PATCH blktests v2] block/020: dynamically change iodepth if test aio-nr lager than aio-max-nr Xiao Liang
@ 2019-04-17 21:41 ` Omar Sandoval
0 siblings, 0 replies; 2+ messages in thread
From: Omar Sandoval @ 2019-04-17 21:41 UTC (permalink / raw)
To: Xiao Liang; +Cc: linux-block, osandov
On Sat, Apr 06, 2019 at 10:27:22PM +0800, Xiao Liang wrote:
> When system has large count of cpus(eg. 96), the test failed as aio-nr over
> aio-max-nr limitation.
>
> This patch continues to use 1024 as default iodepth, but change it if
> iodepth*$(nproc) > aio-max-nr.
Thank you, applied.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-04-06 14:27 [PATCH blktests v2] block/020: dynamically change iodepth if test aio-nr lager than aio-max-nr Xiao Liang
2019-04-17 21:41 ` Omar Sandoval
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