[Bug 1853042] Re: Ubuntu 18.04 - vm disk i/o performance issue when using file system passthrough

[Murilo Opsfelder Araújo]

Hi, Christian.

It would be great if you could share your knowledge on this.

Thank you!

Murilo

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Title:
  Ubuntu 18.04 - vm disk i/o performance issue when using file system
  passthrough

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[Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU

[Murilo Opsfelder Araújo]

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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  Improve NVMe guest performance on Bionic QEMU

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[Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU

[Murilo Opsfelder Araújo]

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-86.6MB/s), 
io=250GiB (269GB), run=60001-60003msec

$ dpkg -l | grep ppa1
ii  qemu  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  fast 
processor emulator
ii  qemu-block-extra:ppc64el  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  extra 
block backend modules for qemu-system and qemu-utils
ii  qemu-kvm  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU Full 
virtualization on x86 hardware
ii  qemu-system   1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries
ii  qemu-system-arm   1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (arm)
ii  qemu-system-common1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (common files)
ii  qemu-system-mips  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (mips)
ii  qemu-system-misc  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (miscellaneous)
ii  qemu-system-ppc   1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (ppc)
ii  qemu-system-s390x 1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (s390x)
ii  qemu-system-sparc 1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (sparc)
ii  qemu-system-x86   1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU full 
system emulation binaries (x86)
ii  qemu-user 1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU user 
mode emulation binaries
ii  qemu-user-binfmt  1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU user 
mode binfmt registration for qemu-user
ii  qemu-utils1:2.11+dfsg-1ubuntu7.20~ppa1  ppc64el  QEMU 
utilities

Note 0: We booted a newer kernel on the host that contained the patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a32295c612c57990d17fb0f41e7134394b2f35f6

Using Bionic kernel 4.15.0-65.74, the performance hasn't changed.
Most likely because Bionic kernel doesn't contain the above patch yet.

Note 1: Kudos to Murilo Vicentini for running the tests and capturing
the numbers.

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  Improve NVMe guest performance on Bionic QEMU

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[Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU

[Murilo Opsfelder Araújo]

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 is an NVMe disk.  We (IBM) can verify and do the
tests, if needed.

Thank you!

Murilo

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[Bug 1787408] Re: qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

[Murilo Opsfelder Araújo]

I can confirm that the build ppa:ci-train-ppa-service/3367 (for Bionic)
works as expected, i.e.: POWER9 guest boots and no hang is observed.

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  qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

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[Bug 1787408] Re: qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

[Murilo Opsfelder Araújo]

Hi, Christian.

I'm glad you've already tested this on P9.  Thank you!

Just for the record, I've managed to test
https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3362 on Cosmic using
the very same P8 box I used to report this and it fixed the bug, i.e. guest
booted as expected and no hang was observed.

Are you going to update Bionic or do you want I submit a new debdiff with your
changes for Cosmic?

Cheers
Murilo

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  qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

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[Bug 1787408] Re: qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

[Murilo Opsfelder Araújo]

** Package changed: ubuntu => qemu (Ubuntu)

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  qemu 1:2.11+dfsg-1ubuntu7.4 hangs when -cpu POWER9 is specified

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[Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le

[Murilo Opsfelder Araújo]

** 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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  ubuntu-kvm-unit test failed with emulator test on ppc64le

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[Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le

[Murilo Opsfelder Araújo]

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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  ubuntu-kvm-unit test failed with emulator test on ppc64le

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[Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le

[Murilo Opsfelder Araújo]

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-5ubuntu10.24.dsc
muriloo@jaspion1:~/sources/ubuntu$ cd qemu-2.5+dfsg/
muriloo@jaspion1:~/sources/ubuntu/qemu-2.5+dfsg$ patch -p1 < 
~/sources/qemu/0001-ppc64-set-MSR_SF-bit.patch
patching file target-ppc/translate_init.c
Hunk #1 succeeded at 9581 (offset -122 lines).
muriloo@jaspion1:~/sources/ubuntu/qemu-2.5+dfsg$ ./configure 
--target-list=ppc64-softmmu && make -j$(nproc)
muriloo@jaspion1:~/sources/ubuntu/qemu-2.5+dfsg$ cd 
~/sources/kvm-unit-tests/build/
muriloo@jaspion1:~/sources/kvm-unit-tests/build$ ../configure --endian=little 
&& make -j$(nproc)
muriloo@jaspion1:~/sources/kvm-unit-tests/build$ sudo 
QEMU=/home/muriloo/sources/ubuntu/qemu-2.5+dfsg/ppc64-softmmu/qemu-system-ppc64 
TESTNAME=emulator TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1
[sudo] password for muriloo: 
timeout -k 1s --foreground 90s 
/home/muriloo/sources/ubuntu/qemu-2.5+dfsg/ppc64-softmmu/qemu-system-ppc64 
-nodefaults -machine pseries,accel=kvm -bios powerpc/boot_rom.bin -display none 
-serial stdio -kernel powerpc/emulator.elf -smp 1 # -initrd /tmp/tmp.Tanwa3UNM4
PASS: emulator: 64bit: detected
PASS: emulator: invalid: exception
PASS: emulator: lswx: alignment
PASS: emulator: lswi: alignment
SUMMARY: 4 tests

EXIT: STATUS=1

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[Bug 1306246] Re: dhcp request doesn't provide client architecture code 93

[Murilo Opsfelder Araújo]

My patch was accepted upstream and it seems to fix this issue.

https://github.com/aik/SLOF/commit/db35f1b8a2d3e44f4a12ca926359cc2575e98064

commit db35f1b8a2d3e44f4a12ca926359cc2575e98064
Author: Murilo Opsfelder Araujo 
Date:   Fri Jun 23 09:23:25 2017 -0300

lib/Makefile: Pass FLAG to make in SUBDIRS target

Some applications, e.g. https://maas.io/, trust on the dhcp code 93
option to reply the correct pxelinux.0 file according to client
architecture.

Today, dhcp.c is compiled without DHCPARCH, which causes it not to
send client architecture in the dhcp request, i.e. dhcpd server can
reply a pxelinux.0 binary that is not intended for client
architecture.

This patch makes sure client architecture is sent in the dhcp request.

Signed-off-by: Murilo Opsfelder Araujo 
Signed-off-by: Alexey Kardashevskiy 

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  dhcp request doesn't provide client architecture code 93

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[Bug 911276] Re: firefox flash videos blocks area in other tabs

[Murilo Opsfelder Araújo]

Today I applied Lucid updates and stopped working again.

With Firefox 10.0 it was working fine. With Firefox 10.0.1 it isn't.

Here is the aptitude log:

Aptitude 0.4.11.11: log report
Mon, Feb 13 2012 09:55:10 -0200

IMPORTANT: this log only lists intended actions; actions which fail due to
dpkg problems may not be completed.

Will install 8 packages, and remove 0 packages.
===
[UPGRADE] firefox 10.0+build1-0ubuntu0.10.04.2 - 10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-branding 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-gnome-support 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-locale-bn 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-locale-de 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-locale-en 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-locale-es 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
[UPGRADE] firefox-locale-pt 10.0+build1-0ubuntu0.10.04.2 - 
10.0.1+build1-0ubuntu0.10.04.1
===

Log complete.

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Title:
  firefox flash videos blocks area in other tabs

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[Bug 658317] Re: Messages log filled with Intel IPS ME failed to update for more than 1s, likely hung messages

[Murilo Opsfelder Araújo]

I believe this was fixed in kernel 2.6.38-10-generic #46 on Natty.
I'm not seeing those messages in /var/log/messages anymore.

Is this still present for someone?

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Title:
  Messages log filled with Intel IPS ME failed to update for more than
  1s, likely hung messages

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[Bug 805209] Re: System locks up after upgrading to linux-image-2.6.32-32-generic-pae

[Murilo Opsfelder Araújo]

Hi guys,

I'd like to add that my T410 didn't freeze with linux-image-2.6.32-32
-generic-pae_2.6.32-32.63~tellis04LP805209_i386.deb also.

Thanks,
Murilo

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  System locks up after upgrading to linux-image-2.6.32-32-generic-pae

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