Public bug reported:
Freshly deployed equal machines with flat disk layout as configured by
MAAS, performance governor changed from ondemand to performance.
Bionic (4.15.0-101-generic) fio ext4 on spinning rust:
Run status group 0 (all jobs):
WRITE: bw=1441MiB/s (1511MB/s), 1441MiB/s-1441MiB/s (1511MB/s-1511MB/s),
io=1267GiB (1360GB), run=900001-900001msec
Disk stats (read/write):
sda: ios=2/332092, merge=0/567, ticks=196/123698912, in_queue=123760992,
util=95.91%
Bionic (4.15.0-101-generic) fio ext4 on nvme:
Run status group 0 (all jobs):
WRITE: bw=2040MiB/s (2139MB/s), 2040MiB/s-2040MiB/s (2139MB/s-2139MB/s),
io=1793GiB (1925GB), run=900001-900001msec
Disk stats (read/write):
nvme0n1: ios=0/2617321, merge=0/465, ticks=0/233900784, in_queue=232549460,
util=78.97%
Focal (5.4.0-31-generic) fio ext4 on spinning rust:
Run status group 0 (all jobs):
WRITE: bw=108MiB/s (113MB/s), 108MiB/s-108MiB/s (113MB/s-113MB/s), io=100GiB
(107GB), run=947255-947255msec
Disk stats (read/write):
sda: ios=65/430942, merge=0/980, ticks=1655/5837146, in_queue=4898628,
util=48.75%
Focal (5.4.0-31-generic) fio ext4 on nvme:
status group 0 (all jobs):
WRITE: bw=361MiB/s (378MB/s), 361MiB/s-361MiB/s (378MB/s-378MB/s), io=320GiB
(344GB), run=907842-907842msec
Disk stats (read/write):
nvme0n1: ios=0/2847497, merge=0/382, ticks=0/236641266, in_queue=230690420,
util=78.95%
Freshly deployed equal machines with bcache as configured by MAAS,
performance governor changed from ondemand to performance.
Bionic (4.15.0-101-generic):
Run status group 0 (all jobs):
WRITE: bw=2080MiB/s (2181MB/s), 2080MiB/s-2080MiB/s (2181MB/s-2181MB/s),
io=1828GiB (1963GB), run=900052-900052msec
Disk stats (read/write):
bcache3: ios=0/53036, merge=0/0, ticks=0/15519188, in_queue=15522076,
util=91.81%, aggrios=0/212383, aggrmerge=0/402, aggrticks=0/59247094,
aggrin_queue=59256646, aggrutil=91.82%
nvme0n1: ios=0/7169, merge=0/397, ticks=0/0, in_queue=0, util=0.00%
sda: ios=0/417598, merge=0/407, ticks=0/118494188, in_queue=118513292,
util=91.82%
Bionic (5.3.0-53-generic):
Run status group 0 (all jobs):
WRITE: bw=2725MiB/s (2858MB/s), 2725MiB/s-2725MiB/s (2858MB/s-2858MB/s),
io=2395GiB (2572GB), run=900001-900001msec
Disk stats (read/write):
bcache3: ios=96/3955, merge=0/0, ticks=4/895876, in_queue=895880,
util=2.63%, aggrios=48/222087, aggrmerge=0/391, aggrticks=3/2730760,
aggrin_queue=2272248, aggrutil=90.56%
nvme0n1: ios=96/2755, merge=0/373, ticks=6/78, in_queue=8, util=1.12%
sda: ios=0/441420, merge=0/409, ticks=0/5461443, in_queue=4544488, util=90.56%
Focal (5.4.0-31-generic):
Run status group 0 (all jobs):
WRITE: bw=117MiB/s (123MB/s), 117MiB/s-117MiB/s (123MB/s-123MB/s), io=110GiB
(118GB), run=959924-959924msec
Disk stats (read/write):
bcache3: ios=0/4061, merge=0/0, ticks=0/1571168, in_queue=1571168,
util=1.40%, aggrios=0/226807, aggrmerge=0/183, aggrticks=0/2816798,
aggrin_queue=2331594, aggrutil=52.79%
nvme0n1: ios=0/1474, merge=0/46, ticks=0/50, in_queue=0, util=0.53%
sda: ios=0/452140, merge=0/321, ticks=0/5633547, in_queue=4663188, util=52.79%
; fio-seq-write.job for fiotest
[global]
name=fio-seq-write
filename=fio-seq-write
rw=write
bs=256K
direct=0
numjobs=1
time_based=1
runtime=900
[file1]
size=10G
ioengine=libaio
iodepth=16
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-31-generic 5.4.0-31.35
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 May 27 11:52 seq
crw-rw---- 1 root audio 116, 33 May 27 11:52 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
Date: Wed May 27 12:44:10 2020
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 002 Device 002: ID 8087:8002 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 413c:a001 Dell Computer Corp. Hub
Bus 001 Device 002: ID 8087:800a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
|__ Port 6: Dev 3, If 0, Class=Hub, Driver=hub/6p, 480M
MachineType: Dell Inc. PowerEdge R630
PciMultimedia:
ProcFB: 0 mgag200drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-31-generic
root=UUID=8dd6086f-e616-466d-a424-e5556fd75045 ro intel_iommu=on iommu=pt
probe_vf=0
RelatedPackageVersions:
linux-restricted-modules-5.4.0-31-generic N/A
linux-backports-modules-5.4.0-31-generic N/A
linux-firmware 1.187
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/08/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.3.4
dmi.board.name: 02C2CP
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr2.3.4:bd11/08/2016:svnDellInc.:pnPowerEdgeR630:pvr:rvnDellInc.:rn02C2CP:rvrA03:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R630
dmi.product.sku: SKU=NotProvided;ModelName=PowerEdge R630
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal uec-images
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https://bugs.launchpad.net/bugs/1880943
Title:
[focal] disk I/O performance regression
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