[Kernel-packages] [Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU
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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1847948 Title: Improve NVMe guest performance on Bionic QEMU Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Fix Released Status in linux source package in Bionic: New Status in qemu source package in Bionic: Triaged Bug description: [Impact] * In the past qemu has generally not allowd MSI-X BAR mapping on VFIO. But there can be platforms (like ppc64 spapr) that can and want to do exactly that. * Backport two patches from upstream (in since qemu 2.12 / Disco). * Due to that there is a tremendous speedup, especially useful with page size bigger than 4k. This avoids that being split into chunks and makes direct MMIO access possible for the guest. [Test Case] * On ppc64 pass through an NVME device to the guest and run I/O benchmarks, see below for Details how to set that up. Note this needs the HWE kernel or another kernel fixup for [1]. [Regression Potential] * Changes: a) if the host driver allows mapping of MSI-X data the entire BAR is mapped. This is only done if the kernel reports that capability [1]. This ensures that only on kernels able to do so qemu does expose the new behavior (safe against regression in that regard) b) on ppc64 MSI-X emulation is disabled for VFIO devices this is local to just this HW and will not affect other HW. Generally the regressions that come to mind are slight changes in behavior (real HW vs the former emulation) that on some weird/old guests could cause trouble. But then it is limited to only PPC where only a small set of certified HW is really allowed. The mapping that might be added even on other platforms should not consume too much extra memory as long as it isn't used. Further since it depends on the kernel capability it isn't randomly issues on kernels where we expect it to fail. So while it is quite a change, it seems safe to me. [Other Info] * I know, one could as well call that a "feature", but it really is a performance bug fix more than anything else. Also the SRU policy allows exploitation/toleration of new HW especially for LTS releases. Therefore I think this is fine as SRU. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a32295c612c57990d17fb0f41e7134394b2f35f6 == Comment: #0 - Murilo Opsfelder Araujo - 2019-10-11 14:16:14 == ---Problem Description--- Back-port the following patches to Bionic QEMU to improve NVMe guest performance by more than 200%: ?vfio-pci: Allow mmap of MSIX BAR? https://git.qemu.org/?p=qemu.git;a=commit;h=ae0215b2bb56a9d5321a185dde133bfdd306a4c0 ?ppc/spapr, vfio: Turn off MSIX emulation for VFIO devices? https://git.qemu.org/?p=qemu.git;a=commit;h=fcad0d2121976df4b422b4007a5eb7fcaac01134 ---uname output--- na ---Additional Hardware Info--- 0030:01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01) Machine Type = AC922 ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Install or setup a guest image and boot it. Once guest is running, passthrough the NVMe disk to the guest using the XML: host$ cat nvme-disk.xml host$ virsh attach-device nvme-disk.xml --live On the guest, run fio benchmarks: guest$ fio --direct=1 --rw=randrw --refill_buffers --norandommap --randrepeat=0 --ioengine=libaio --bs=4k --rwmixread=100 --iodepth=16 --runtime=60 --name=job1 --filename=/dev/nvme0n1 --numjobs=4 Results are similar with numjobs=4 and numjobs=64, respectively: READ: bw=385MiB/s (404MB/s), 78.0MiB/s-115MiB/s (81.8MB/s-120MB/s), io=11.3GiB (12.1GB), run=30001-30001msec READ: bw=382MiB/s (400MB/s), 2684KiB/s-12.6MiB/s (2749kB/s-13.2MB/s), io=11.2GiB (12.0GB), run=30001-30009msec With the two patches applied, performance improved significantly for numjobs=4 and numjobs=64 cases, respectively: READ: bw=1191MiB/s (1249MB/s), 285MiB/s-309MiB/s (299MB/s-324MB/s), io=34.9GiB (37.5GB), run=30001-30001msec READ: bw=4273MiB/s (4481MB/s), 49.7MiB/s-113MiB/s (52.1MB/s-119MB/s), io=125GiB (134GB), run=30001-30005msec Userspace tool common name: qemu Userspace rpm: qemu The userspace tool has the following bit modes: 64-bit Userspace tool obtained from project website: na To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems
[Kernel-packages] [Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU
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. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1847948 Title: Improve NVMe guest performance on Bionic QEMU Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Fix Released Status in linux source package in Bionic: New Status in qemu source package in Bionic: Triaged Bug description: [Impact] * In the past qemu has generally not allowd MSI-X BAR mapping on VFIO. But there can be platforms (like ppc64 spapr) that can and want to do exactly that. * Backport two patches from upstream (in since qemu 2.12 / Disco). * Due to that there is a tremendous speedup, especially useful with page size bigger than 4k. This avoids that being split into chunks and makes direct MMIO access possible for the guest. [Test Case] * On ppc64 pass through an NVME device to the guest and run I/O benchmarks, see below for Details how to set that up. Note this needs the HWE kernel or another kernel fixup for [1]. [Regression Potential] * Changes: a) if the host driver allows mapping of MSI-X data the entire BAR is mapped. This is only done if the kernel reports that capability [1]. This ensures that only on kernels able to do so qemu does expose the new behavior (safe against regression in that regard) b) on ppc64 MSI-X emulation is disabled for VFIO devices this is local to just this HW and will not affect other HW. Generally the regressions that come to mind are slight changes in behavior (real HW vs the former emulation) that on some weird/old guests could cause trouble. But then it is limited to only PPC where only a small set of certified HW is really allowed. The mapping that might be added even on other platforms should not consume too much extra memory as long as it isn't used. Further since it depends on the kernel capability it isn't randomly issues on kernels where we expect it to fail. So while it is quite a change, it seems safe to me. [Other Info] * I know, one could as well call that a "feature", but it really is a performance bug fix more than anything else. Also the SRU policy allows exploitation/toleration of new HW especially for LTS releases. Therefore I think this is fine as SRU. [1]: https://git.kernel.org/pub/scm/linu
[Kernel-packages] [Bug 1847948] Re: Improve NVMe guest performance on Bionic QEMU
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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1847948 Title: Improve NVMe guest performance on Bionic QEMU Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Fix Released Status in linux source package in Bionic: New Status in qemu source package in Bionic: Triaged Bug description: == Comment: #0 - Murilo Opsfelder Araujo - 2019-10-11 14:16:14 == ---Problem Description--- Back-port the following patches to Bionic QEMU to improve NVMe guest performance by more than 200%: ?vfio-pci: Allow mmap of MSIX BAR? https://git.qemu.org/?p=qemu.git;a=commit;h=ae0215b2bb56a9d5321a185dde133bfdd306a4c0 ?ppc/spapr, vfio: Turn off MSIX emulation for VFIO devices? https://git.qemu.org/?p=qemu.git;a=commit;h=fcad0d2121976df4b422b4007a5eb7fcaac01134 ---uname output--- na ---Additional Hardware Info--- 0030:01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01) Machine Type = AC922 ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Install or setup a guest image and boot it. Once guest is running, passthrough the NVMe disk to the guest using the XML: host$ cat nvme-disk.xml host$ virsh attach-device nvme-disk.xml --live On the guest, run fio benchmarks: guest$ fio --direct=1 --rw=randrw --refill_buffers --norandommap --randrepeat=0 --ioengine=libaio --bs=4k --rwmixread=100 --iodepth=16 --runtime=60 --name=job1 --filename=/dev/nvme0n1 --numjobs=4 Results are similar with numjobs=4 and numjobs=64, respectively: READ: bw=385MiB/s (404MB/s), 78.0MiB/s-115MiB/s (81.8MB/s-120MB/s), io=11.3GiB (12.1GB), run=30001-30001msec READ: bw=382MiB/s (400MB/s), 2684KiB/s-12.6MiB/s (2749kB/s-13.2MB/s), io=11.2GiB (12.0GB), run=30001-30009msec With the two patches applied, performance improved significantly for numjobs=4 and numjobs=64 cases, respectively: READ: bw=1191MiB/s (1249MB/s), 285MiB/s-309MiB/s (299MB/s-324MB/s), io=34.9GiB (37.5GB), run=30001-30001msec READ: bw=4273MiB/s (4481MB/s), 49.7MiB/s-113MiB/s (52.1MB/s-119MB/s), io=125GiB (134GB), run=30001-30005msec Userspace tool common name: qemu Userspace rpm: qemu The userspace tool has the following bit modes: 64-bit Userspace tool obtained from project website: na To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1847948/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le
** Patch added: "debdiff for Xenial qemu" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723914/+attachment/5099155/+files/debdiff_qemu_xenial.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1723914 Title: ubuntu-kvm-unit test failed with emulator test on ppc64le Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: New Bug description: Similar to bug 1723904, bug 1712803. The failed "emulator" test from kvm-unit-test will pass with qemu-2.7.1 built from source. ubuntu@modoc:~/kvm-unit-tests$ sudo /bin/bash -c "TESTNAME=emulator TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1 > " timeout -k 1s --foreground 90s /usr/bin/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.BJ2sE7V2Jc FAIL: emulator: 64bit: detected PASS: emulator: invalid: exception PASS: emulator: lswx: alignment PASS: emulator: lswi: alignment SUMMARY: 4 tests, 1 unexpected failures EXIT: STATUS=3 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1 ProcVersionSignature: User Name 4.10.0-37.41~16.04.1-generic 4.10.17 Uname: Linux 4.10.0-37-generic ppc64le ApportVersion: 2.20.1-0ubuntu2.10 Architecture: ppc64el Date: Mon Oct 16 10:10:46 2017 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcLoadAvg: 0.00 0.00 0.57 1/1457 83356 ProcLocks: 1: POSIX ADVISORY WRITE 1604 00:14:19651 0 EOF 2: POSIX ADVISORY WRITE 2937 00:14:55331 0 EOF 3: FLOCK ADVISORY WRITE 3046 00:14:67623 0 EOF 4: POSIX ADVISORY WRITE 3124 00:14:57398 0 EOF 5: POSIX ADVISORY WRITE 3047 00:14:87068 0 EOF ProcSwaps: Filename TypeSizeUsedPriority /swap.img file 8388544 0 -1 ProcVersion: Linux version 4.10.0-37-generic (buildd@bos01-ppc64el-026) (gcc version 5.4.0 20160609 (User Name/IBM 5.4.0-6ubuntu1~16.04.4) ) #41~16.04.1-User Name SMP Fri Oct 6 22:44:24 UTC 2017 SourcePackage: linux-hwe UpgradeStatus: No upgrade log present (probably fresh install) cpu_cores: Number of cores present = 20 cpu_coreson: Number of cores online = 20 cpu_smt: SMT is off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1723914/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le
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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1723914 Title: ubuntu-kvm-unit test failed with emulator test on ppc64le Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: New Bug description: Similar to bug 1723904, bug 1712803. The failed "emulator" test from kvm-unit-test will pass with qemu-2.7.1 built from source. ubuntu@modoc:~/kvm-unit-tests$ sudo /bin/bash -c "TESTNAME=emulator TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1 > " timeout -k 1s --foreground 90s /usr/bin/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.BJ2sE7V2Jc FAIL: emulator: 64bit: detected PASS: emulator: invalid: exception PASS: emulator: lswx: alignment PASS: emulator: lswi: alignment SUMMARY: 4 tests, 1 unexpected failures EXIT: STATUS=3 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1 ProcVersionSignature: User Name 4.10.0-37.41~16.04.1-generic 4.10.17 Uname: Linux 4.10.0-37-generic ppc64le ApportVersion: 2.20.1-0ubuntu2.10 Architecture: ppc64el Date: Mon Oct 16 10:10:46 2017 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcLoadAvg: 0.00 0.00 0.57 1/1457 83356 ProcLocks: 1: POSIX ADVISORY WRITE 1604 00:14:19651 0 EOF 2: POSIX ADVISORY WRITE 2937 00:14:55331 0 EOF 3: FLOCK ADVISORY WRITE 3046 00:14:67623 0 EOF 4: POSIX ADVISORY WRITE 3124 00:14:57398 0 EOF 5: POSIX ADVISORY WRITE 3047 00:14:87068 0 EOF ProcSwaps: Filename TypeSizeUsedPriority /swap.img file 8388544 0 -1 ProcVersion: Linux version 4.10.0-37-generic (buildd@bos01-ppc64el-026) (gcc version 5.4.0 20160609 (User Name/IBM 5.4.0-6ubuntu1~16.04.4) ) #41~16.04.1-User Name SMP Fri Oct 6 22:44:24 UTC 2017 SourcePackage: linux-hwe UpgradeStatus: No upgrade log present (probably fresh install) cpu_cores: Number of cores present = 20 cpu_coreson: Number of cores online = 20 cpu_smt: SMT is off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1723914/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1723914] Re: ubuntu-kvm-unit test failed with emulator test on ppc64le
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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https://bugs.launchpad.net/bugs/1723914
Title:
ubuntu-kvm-unit test failed with emulator test on ppc64le
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
New
Bug description:
Similar to bug 1723904, bug 1712803.
The failed "emulator" test from kvm-unit-test will pass with qemu-2.7.1 built
from source.
ubuntu@modoc:~/kvm-unit-tests$ sudo /bin/bash -c "TESTNAME=emulator
TIMEOUT=90s ACCEL= ./powerpc/run powerpc/emulator.elf -smp 1
> "
timeout -k 1s --foreground 90s /usr/bin/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.BJ2sE7V2Jc
FAIL: emulator: 64bit: detected
PASS: emulator: invalid: exception
PASS: emulator: lswx: alignment
PASS: emulator: lswi: alignment
SUMMARY: 4 tests, 1 unexpected failures
EXIT: STATUS=3
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1
ProcVersionSignature: User Name 4.10.0-37.41~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-37-generic ppc64le
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: ppc64el
Date: Mon Oct 16 10:10:46 2017
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcLoadAvg: 0.00 0.00 0.57 1/1457 83356
ProcLocks:
1: POSIX ADVISORY WRITE 1604 00:14:19651 0 EOF
2: POSIX ADVISORY WRITE 2937 00:14:55331 0 EOF
3: FLOCK ADVISORY WRITE 3046 00:14:67623 0 EOF
4: POSIX ADVISORY WRITE 3124 00:14:57398 0 EOF
5: POSIX ADVISORY WRITE 3047 00:14:87068 0 EOF
ProcSwaps:
Filename TypeSizeUsedPriority
/swap.img file 8388544 0 -1
ProcVersion: Linux version 4.10.0-37-generic (buildd@bos01-ppc64el-026) (gcc
version 5.4.0 20160609 (User Name/IBM 5.4.0-6ubuntu1~16.04.4) )
#41~16.04.1-User Name SMP Fri Oct 6 22:44:24 UTC 2017
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
cpu_cores: Number of cores present = 20
cpu_coreson: Number of cores online = 20
cpu_smt: SMT is off
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