linux-kernel - [PATCH blktests v3 09/12] common/fio: Limit number of random jobs

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Date:   Wed,  3 May 2023 10:02:55 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Chaitanya Kulkarni <kch@...dia.com>,
        Shin'ichiro Kawasaki <shinichiro@...tmail.com>,
        Hannes Reinecke <hare@...e.de>, Daniel Wagner <dwagner@...e.de>
Subject: [PATCH blktests v3 09/12] common/fio: Limit number of random jobs

Limit the number of random threads to 32 for big machines. This still
gives enough randomness but limits the resource usage.

Signed-off-by: Daniel Wagner <dwagner@...e.de>
---
 common/fio | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/fio b/common/fio
index 1db6128be632..06659d7d1d84 100644
--- a/common/fio
+++ b/common/fio
@@ -189,7 +189,8 @@ _run_fio() {
 # Wrapper around _run_fio used if you need some I/O but don't really care much
 # about the details
 _run_fio_rand_io() {
-	_run_fio --bs=4k --rw=randread --norandommap --numjobs="$(nproc)" \
+	_run_fio --bs=4k --rw=randread --norandommap \
+		--numjobs="$(OMP_THREAD_LIMIT=32 nproc)" \
 		--name=reads --direct=1 "$@"
 }
 
-- 
2.40.0