Christian,
Patch from comment 8 seems yet another nice improvement. We haven't
tried it to have a strong opinion.
If it's included, then I think patch from comment 9 won't hurt being
added too.
Murilo
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Christian,
Using QEMU from comment 6, it improved the performance for numjobs=4 and
numjobs=64 cases, respectively:
READ: bw=1140MiB/s (1195MB/s), 271MiB/s-302MiB/s (284MB/s-317MB/s),
io=66.8GiB (71.7GB), run=60001-60001msec
READ: bw=4271MiB/s (4479MB/s), 30.1MiB/s-82.6MiB/s (31.6MB/s-86.6
Christian,
The test case for this is to:
- passthrough the NVMe disk to guest;
- and run fio benchmarks against the passed-through NVMe disk in the guest.
I have detailed these steps and pasted the commands in the bug
description. Please let me know if steps are not clear.
The only required HW
** Patch added: "debdiff for Xenial qemu"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723914/+attachment/5099155/+files/debdiff_qemu_xenial.patch
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Manoj, Christian,
Please refer to the attached debdiff (it was my first debdiff, so it
might contain errors :)).
Let me know if you need anything else.
Cheers
Murilo
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Pior to commit 8b9f2118ca40b1de72d8f75b59a5fb4d347a69f7 ("ppc64: set
MSR_SF bit"), qemu-system-ppc64 was not setting the 64-bit mode bit in
MSR.
Applying it on top of qemu 2.5 from Ubuntu 16.04.04, makes kvm-unit-
tests happy.
muriloo@jaspion1:~/sources/ubuntu$ dpkg-source -x qemu_2.5+dfsg-5ubunt
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