"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes:
> On Tue, Feb 19, 2013 at 06:26:20PM +1030, Rusty Russell wrote:
>> virtio_scsi can really use this, to avoid the current hack of copying
>> the whole sg array. Some other things get slightly neater, too.
>>
>> Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
>
> Hmm, this makes add_buf a bit slower. virtio_test results
> (I'll send a patch to update the test shortly):
>
> Before:
> 0.09user 0.01system 0:00.12elapsed 91%CPU (0avgtext+0avgdata 480maxresident)k
> 0inputs+0outputs (0major+145minor)pagefaults 0swaps
>
> After:
> 0.11user 0.01system 0:00.13elapsed 90%CPU (0avgtext+0avgdata 480maxresident)k
> 0inputs+0outputs (0major+145minor)pagefaults 0swaps
Interesting: how much of this is due to the shim in virtqueue_add_buf()
to clean up the sg arrays?
(Perhaps we should make virtio_test run for longer, too).
BTW, you might be interested in:
https://github.com/rustyrussell/stats.git
Which provides a useful filter for multiple results.
Cheers,
Rusty.
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
