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2020 Sep 18
1
Re: [PATCH v2v] v2v: Set the number of vCPUs to same as host number of pCPUs.
...ut) doesn't use parallel > > compression? > > Do you do anything special to optimize storage ? If the thing using > parallel CPUs in the guest is doing I/O you'd likely want to tune > storage at same time. In current QEMU git master there's a change[1] > that sets viort-blk/virtio-scsi num_queues to match SMP count, > so the guest OS get fully parallel I/O from meach guest CPU. > > [1] a4eef0711b2cf7a7476c3e2c202a414b68a1baa0 I'm not using a new enough qemu to have that and it doesn't appear in a released version, but I'll test again once w...
2020 Sep 18
4
[PATCH v2v] v2v: Set the number of vCPUs to same as host number of pCPUs.
So it didn't make any noticable difference in my test. I wonder if the test guest I'm using (Fedora 32 using dracut) doesn't use parallel compression? However I don't think it can cause a problem and it seems obvious that it could benefit some cases. Rich.
2020 Sep 18
0
Re: [PATCH v2v] v2v: Set the number of vCPUs to same as host number of pCPUs.
...;m using (Fedora 32 using dracut) doesn't use parallel > compression? Do you do anything special to optimize storage ? If the thing using parallel CPUs in the guest is doing I/O you'd likely want to tune storage at same time. In current QEMU git master there's a change[1] that sets viort-blk/virtio-scsi num_queues to match SMP count, so the guest OS get fully parallel I/O from meach guest CPU. [1] a4eef0711b2cf7a7476c3e2c202a414b68a1baa0 > However I don't think it can cause a problem and it seems obvious that > it could benefit some cases. What's the default RAM s...