Hi John,
On Wed, Apr 08, 2020 at 02:01:11PM +0100, John Garry wrote:
> Is stress-cpu-hotplug an ltp test? or from Steven Rostedt - I saw some
> threads where he mentioned some script?
My bad. It's the script from Steven, which toggle binary the cpus on/off:
[...]
2432 disabling cpu16 disabling cpu17 disabling cpu2
2433 disabling cpu1 enabling cpu16 enabling cpu17 enabling cpu2
2434 disabling cpu10 disabling cpu16 disabling cpu17 disabling cpu2
2435 enabling cpu1 enabling cpu10 enabling cpu16 enabling cpu17 enabling cpu2
2436 disabling cpu11 disabling cpu16 disabling cpu17 disabling cpu2
2437 disabling cpu1 enabling cpu11 enabling cpu16 enabling cpu17 enabling cpu2
2438 disabling cpu10 disabling cpu11 disabling cpu16 disabling cpu17 disabling cpu2
[..]
> Will the fio processes migrate back onto cpus which have been onlined again?
Hmm, good question. I've tried to assign them to a specific CPU via
--cpus_allowed_policy=split and --cpus_allowed.
fio --rw=randwrite --name=test --size=50M --iodepth=32 --direct=1 \
--bs=4k --numjobs=40 --time_based --runtime=1h --ioengine=libaio \
--group_reporting --cpus_allowed_policy=split --cpus_allowed=0-40
Though I haven't verified what happens when the CPU get's back online.
> What is the block driver NVMe?
I've used a qla2xxx device. Hannes asked my to retry it with a megasas
device.
Thanks,
Daniel
