From 36ecec830e25ce8f707632c464e366b21a0b0f4d Mon Sep 17 00:00:00 2001 From: Gurudas Pai Date: Fri, 8 Feb 2008 08:50:14 +0100 Subject: [PATCH 1/1] fio: HOWTO update In case of cpuio , on smp machines we need increase numjobs to to get the desired load across cpu's. Just updated HOWTO with this info. Signed-off-by: Jens Axboe --- HOWTO | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/HOWTO b/HOWTO index 0d3d7759..d8c6b941 100644 --- a/HOWTO +++ b/HOWTO @@ -383,7 +383,10 @@ ioengine=str Defines how the job issues io to the file. The following cycles according to the cpuload= and cpucycle= options. Setting cpuload=85 will cause that job to do nothing but burn - 85% of the CPU. + 85% of the CPU. In case of SMP machines, + use numjobs= to get desired CPU + usage, as the cpuload only loads a single + CPU at the desired rate. guasi The GUASI IO engine is the Generic Userspace Asyncronous Syscall Interface approach -- 2.25.1