On 7 Feb 2013, at 21:15, Henry Cheang <henrycheang@hotmail.com> wrote:

Hello, I am running Foundation_v8 with images from Linaro as follows:

./Foundation_v8 --image=img-foundation.axf --block-device=vexpress64-openembedded_sdk-armv8_20130127-242.img --network=nat --network-nat-ports=8022=22

I noticed that often when I ssd or scp into the target (ssh -p 8022 root@localhost ), the Foundation_v8 would spike to 100% usage on the host for a few minute before ssh would returns which makes the process very slow. Doing "top" in the target shows that 98% of cpu is being used servicing sirq (soft irq). Has anybody seen this and is there a solution? Thanks.

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Sounds similar to this issue:

https://bugs.launchpad.net/linaro-aarch64/+bug/1099896

/Marcus

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