Hi,
This has alloc_cmd() cleanup that removes statically hardcoded function
parameter and removes the need for the local variable on the stack.
Detailed test log is below that creates 5 memory backed nullb devices
with queue_mode=0 (NULL_Q_BIO) and runs fio verify job, here is the
summary:-
# grep err= p/null-blk-alloc-cmd/0000-cover-letter.patch
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4785: Wed Feb 16 08:39:35 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4788: Wed Feb 16 08:39:36 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4791: Wed Feb 16 08:39:37 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4794: Wed Feb 16 08:39:39 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4797: Wed Feb 16 08:39:40 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4800: Wed Feb 16 08:39:42 2022
Below is detailed test log.
-ck
changes from v1:-
1. Squash both patches.
Chaitanya Kulkarni (1):
null_blk: remove hardcoded alloc_cmd() parameter
drivers/block/null_blk/main.c | 29 ++++++++++++-----------------
1 file changed, 12 insertions(+), 17 deletions(-)
fio verification test log for memory backed null_blk queue mode=0 (BIO):
# git am p/null-blk-alloc-cmd/0001-null_blk-remove-hardcoded-alloc_cmd-parameter.patch
Applying: null_blk: remove hardcoded alloc_cmd() parameter
root@dev linux-block (for-next) # ./compile_nullb.sh
+ umount /mnt/nullb0
umount: /mnt/nullb0: no mount point specified.
+ rmdir 'config/nullb/nullb*'
rmdir: failed to remove 'config/nullb/nullb*': No such file or directory
+ dmesg -c
+ modprobe -r null_blk
+ lsmod
+ grep null_blk
+ git apply wip.diff
++ nproc
+ make -j 48 M=drivers/block modules
CC [M] drivers/block/pktcdvd.o
CC [M] drivers/block/null_blk/main.o
LD [M] drivers/block/null_blk/null_blk.o
MODPOST drivers/block/Module.symvers
LD [M] drivers/block/null_blk/null_blk.ko
LD [M] drivers/block/pktcdvd.ko
+ HOST=drivers/block/null_blk/
++ uname -r
+ HOST_DEST=/lib/modules/5.17.0-rc3blk+/kernel/drivers/block/null_blk/
+ cp drivers/block/null_blk//null_blk.ko /lib/modules/5.17.0-rc3blk+/kernel/drivers/block/null_blk//
+ ls -lrth /lib/modules/5.17.0-rc3blk+/kernel/drivers/block/null_blk//null_blk.ko
-rw-r--r--. 1 root root 1.1M Feb 16 08:39 /lib/modules/5.17.0-rc3blk+/kernel/drivers/block/null_blk//null_blk.ko
+ sleep 1
+ dmesg -c
root@dev linux-block (for-next) # ./nullbtests.sh 5
+ rmdir 'config/nullb/nullb*'
rmdir: failed to remove 'config/nullb/nullb*': No such file or directory
+ NN=5
+ modprobe -r null_blk
+ modprobe null_blk nr_devices=0 queue_mode=0
+ echo loading devices
loading devices
++ seq 0 5
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb0
+ mkdir config/nullb/nullb0
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb0/queue_mode
0
+ echo 1
++ cat config/nullb/nullb0/index
+ IDX=0
+ echo -n ' 0 '
0 + sleep .50
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb1
+ mkdir config/nullb/nullb1
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb1/queue_mode
0
+ echo 1
++ cat config/nullb/nullb1/index
+ IDX=1
+ echo -n ' 1 '
1 + sleep .50
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb2
+ mkdir config/nullb/nullb2
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb2/queue_mode
0
+ echo 1
++ cat config/nullb/nullb2/index
+ IDX=2
+ echo -n ' 2 '
2 + sleep .50
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb3
+ mkdir config/nullb/nullb3
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb3/queue_mode
0
+ echo 1
++ cat config/nullb/nullb3/index
+ IDX=3
+ echo -n ' 3 '
3 + sleep .50
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb4
+ mkdir config/nullb/nullb4
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb4/queue_mode
0
+ echo 1
++ cat config/nullb/nullb4/index
+ IDX=4
+ echo -n ' 4 '
4 + sleep .50
+ for i in `seq 0 $NN`
+ NULLB_DIR=config/nullb/nullb5
+ mkdir config/nullb/nullb5
+ echo 1
+ echo 512
+ echo 2048
+ cat config/nullb/nullb5/queue_mode
0
+ echo 1
++ cat config/nullb/nullb5/index
+ IDX=5
+ echo -n ' 5 '
5 + sleep .50
+ lsblk
+ grep null
+ sort
nullb0 251:0 0 2G 0 disk
nullb1 251:1 0 2G 0 disk
nullb2 251:2 0 2G 0 disk
nullb3 251:3 0 2G 0 disk
nullb4 251:4 0 2G 0 disk
nullb5 251:5 0 2G 0 disk
+ sleep 1
+ dmesg -c
[23177.918196] null_blk: module loaded
+ lsblk
+ grep null
nullb0 251:0 0 2G 0 disk
nullb1 251:1 0 2G 0 disk
nullb2 251:2 0 2G 0 disk
nullb3 251:3 0 2G 0 disk
nullb4 251:4 0 2G 0 disk
nullb5 251:5 0 2G 0 disk
++ seq 0 5
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb0
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4785: Wed Feb 16 08:39:35 2022
read: IOPS=105k, BW=409MiB/s (429MB/s)(158MiB/386msec)
slat (nsec): min=6664, max=60937, avg=7129.77, stdev=1327.63
clat (usec): min=3, max=237, avg=144.66, stdev= 9.32
lat (usec): min=10, max=247, avg=151.84, stdev= 9.63
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 141], 10.00th=[ 141], 20.00th=[ 141],
| 30.00th=[ 141], 40.00th=[ 141], 50.00th=[ 141], 60.00th=[ 143],
| 70.00th=[ 145], 80.00th=[ 147], 90.00th=[ 155], 95.00th=[ 157],
| 99.00th=[ 194], 99.50th=[ 208], 99.90th=[ 223], 99.95th=[ 227],
| 99.99th=[ 233]
write: IOPS=88.2k, BW=344MiB/s (361MB/s)(250MiB/726msec); 0 zone resets
slat (usec): min=7, max=103, avg= 9.20, stdev= 2.88
clat (usec): min=3, max=430, avg=171.65, stdev=38.49
lat (usec): min=11, max=457, avg=180.91, stdev=40.53
clat percentiles (usec):
| 1.00th=[ 151], 5.00th=[ 153], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 159], 40.00th=[ 161], 50.00th=[ 161], 60.00th=[ 165],
| 70.00th=[ 167], 80.00th=[ 172], 90.00th=[ 180], 95.00th=[ 235],
| 99.00th=[ 363], 99.50th=[ 375], 99.90th=[ 388], 99.95th=[ 396],
| 99.99th=[ 420]
bw ( KiB/s): min=168936, max=343064, per=72.60%, avg=256000.00, stdev=123127.09, samples=2
iops : min=42234, max=85766, avg=64000.00, stdev=30781.77, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.12%
lat (usec) : 500=2.86%
cpu : usr=15.59%, sys=84.41%, ctx=1, majf=0, minf=966
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40433,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=409MiB/s (429MB/s), 409MiB/s-409MiB/s (429MB/s-429MB/s), io=158MiB (166MB), run=386-386msec
WRITE: bw=344MiB/s (361MB/s), 344MiB/s-344MiB/s (361MB/s-361MB/s), io=250MiB (262MB), run=726-726msec
Disk stats (read/write):
nullb0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb1
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4788: Wed Feb 16 08:39:36 2022
read: IOPS=104k, BW=406MiB/s (425MB/s)(158MiB/389msec)
slat (nsec): min=6523, max=38994, avg=7171.20, stdev=1427.41
clat (usec): min=3, max=276, avg=146.06, stdev=16.82
lat (usec): min=10, max=289, avg=153.28, stdev=17.58
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 139], 10.00th=[ 141], 20.00th=[ 141],
| 30.00th=[ 141], 40.00th=[ 141], 50.00th=[ 141], 60.00th=[ 143],
| 70.00th=[ 145], 80.00th=[ 149], 90.00th=[ 153], 95.00th=[ 157],
| 99.00th=[ 247], 99.50th=[ 255], 99.90th=[ 269], 99.95th=[ 273],
| 99.99th=[ 277]
write: IOPS=85.9k, BW=336MiB/s (352MB/s)(250MiB/745msec); 0 zone resets
slat (usec): min=7, max=588, avg= 9.44, stdev= 3.92
clat (usec): min=5, max=970, avg=176.13, stdev=44.46
lat (usec): min=17, max=990, avg=185.64, stdev=46.77
clat percentiles (usec):
| 1.00th=[ 153], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 159], 40.00th=[ 161], 50.00th=[ 163], 60.00th=[ 165],
| 70.00th=[ 169], 80.00th=[ 174], 90.00th=[ 186], 95.00th=[ 314],
| 99.00th=[ 343], 99.50th=[ 351], 99.90th=[ 388], 99.95th=[ 396],
| 99.99th=[ 906]
bw ( KiB/s): min=163840, max=348160, per=74.50%, avg=256000.00, stdev=130333.92, samples=2
iops : min=40960, max=87040, avg=64000.00, stdev=32583.48, samples=2
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=94.97%, 500=5.00%, 750=0.01%, 1000=0.01%
cpu : usr=17.65%, sys=82.17%, ctx=4, majf=0, minf=965
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40387,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=406MiB/s (425MB/s), 406MiB/s-406MiB/s (425MB/s-425MB/s), io=158MiB (165MB), run=389-389msec
WRITE: bw=336MiB/s (352MB/s), 336MiB/s-336MiB/s (352MB/s-352MB/s), io=250MiB (262MB), run=745-745msec
Disk stats (read/write):
nullb1: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb2
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4791: Wed Feb 16 08:39:37 2022
read: IOPS=106k, BW=413MiB/s (433MB/s)(158MiB/383msec)
slat (nsec): min=6523, max=55355, avg=7071.79, stdev=1960.31
clat (usec): min=4, max=223, avg=143.34, stdev=10.38
lat (usec): min=10, max=230, avg=150.46, stdev=10.68
clat percentiles (usec):
| 1.00th=[ 137], 5.00th=[ 137], 10.00th=[ 139], 20.00th=[ 139],
| 30.00th=[ 139], 40.00th=[ 139], 50.00th=[ 139], 60.00th=[ 141],
| 70.00th=[ 143], 80.00th=[ 149], 90.00th=[ 153], 95.00th=[ 159],
| 99.00th=[ 198], 99.50th=[ 200], 99.90th=[ 215], 99.95th=[ 217],
| 99.99th=[ 223]
write: IOPS=92.8k, BW=362MiB/s (380MB/s)(250MiB/690msec); 0 zone resets
slat (nsec): min=7073, max=97565, avg=8751.19, stdev=2544.55
clat (usec): min=3, max=460, avg=163.23, stdev=15.67
lat (usec): min=10, max=478, avg=172.04, stdev=16.25
clat percentiles (usec):
| 1.00th=[ 149], 5.00th=[ 151], 10.00th=[ 153], 20.00th=[ 155],
| 30.00th=[ 157], 40.00th=[ 159], 50.00th=[ 161], 60.00th=[ 163],
| 70.00th=[ 165], 80.00th=[ 169], 90.00th=[ 176], 95.00th=[ 182],
| 99.00th=[ 227], 99.50th=[ 237], 99.90th=[ 351], 99.95th=[ 359],
| 99.99th=[ 449]
bw ( KiB/s): min=143672, max=368328, per=69.00%, avg=256000.00, stdev=158855.78, samples=2
iops : min=35918, max=92082, avg=64000.00, stdev=39713.95, samples=2
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=99.83%, 500=0.15%
cpu : usr=15.21%, sys=84.05%, ctx=0, majf=0, minf=968
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40506,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=413MiB/s (433MB/s), 413MiB/s-413MiB/s (433MB/s-433MB/s), io=158MiB (166MB), run=383-383msec
WRITE: bw=362MiB/s (380MB/s), 362MiB/s-362MiB/s (380MB/s-380MB/s), io=250MiB (262MB), run=690-690msec
Disk stats (read/write):
nullb2: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb3
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4794: Wed Feb 16 08:39:39 2022
read: IOPS=104k, BW=408MiB/s (428MB/s)(159MiB/389msec)
slat (nsec): min=6683, max=27382, avg=7160.42, stdev=1167.62
clat (usec): min=4, max=221, avg=145.13, stdev= 5.78
lat (usec): min=11, max=228, avg=152.33, stdev= 5.91
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 141], 10.00th=[ 141], 20.00th=[ 143],
| 30.00th=[ 143], 40.00th=[ 143], 50.00th=[ 143], 60.00th=[ 145],
| 70.00th=[ 147], 80.00th=[ 149], 90.00th=[ 155], 95.00th=[ 157],
| 99.00th=[ 163], 99.50th=[ 165], 99.90th=[ 172], 99.95th=[ 182],
| 99.99th=[ 219]
write: IOPS=89.3k, BW=349MiB/s (366MB/s)(250MiB/717msec); 0 zone resets
slat (nsec): min=7153, max=83438, avg=9084.91, stdev=2529.20
clat (usec): min=3, max=370, avg=169.60, stdev=32.10
lat (usec): min=11, max=387, avg=178.75, stdev=33.80
clat percentiles (usec):
| 1.00th=[ 151], 5.00th=[ 153], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 159], 40.00th=[ 161], 50.00th=[ 163], 60.00th=[ 165],
| 70.00th=[ 167], 80.00th=[ 172], 90.00th=[ 178], 95.00th=[ 186],
| 99.00th=[ 334], 99.50th=[ 343], 99.90th=[ 355], 99.95th=[ 359],
| 99.99th=[ 367]
bw ( KiB/s): min=162784, max=349216, per=71.70%, avg=256000.00, stdev=131827.33, samples=2
iops : min=40696, max=87304, avg=64000.00, stdev=32956.83, samples=2
lat (usec) : 4=0.01%, 10=0.01%, 20=0.01%, 50=0.01%, 100=0.01%
lat (usec) : 250=97.45%, 500=2.53%
cpu : usr=15.75%, sys=84.16%, ctx=2, majf=0, minf=971
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40628,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=408MiB/s (428MB/s), 408MiB/s-408MiB/s (428MB/s-428MB/s), io=159MiB (166MB), run=389-389msec
WRITE: bw=349MiB/s (366MB/s), 349MiB/s-349MiB/s (366MB/s-366MB/s), io=250MiB (262MB), run=717-717msec
Disk stats (read/write):
nullb3: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb4
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4797: Wed Feb 16 08:39:40 2022
read: IOPS=104k, BW=407MiB/s (427MB/s)(158MiB/389msec)
slat (nsec): min=6692, max=30297, avg=7184.25, stdev=1205.87
clat (usec): min=3, max=210, avg=145.52, stdev= 5.61
lat (usec): min=10, max=218, avg=152.75, stdev= 5.72
clat percentiles (usec):
| 1.00th=[ 141], 5.00th=[ 141], 10.00th=[ 141], 20.00th=[ 143],
| 30.00th=[ 143], 40.00th=[ 143], 50.00th=[ 143], 60.00th=[ 145],
| 70.00th=[ 147], 80.00th=[ 151], 90.00th=[ 155], 95.00th=[ 157],
| 99.00th=[ 159], 99.50th=[ 163], 99.90th=[ 169], 99.95th=[ 176],
| 99.99th=[ 208]
write: IOPS=89.1k, BW=348MiB/s (365MB/s)(250MiB/718msec); 0 zone resets
slat (nsec): min=7233, max=79141, avg=9099.52, stdev=2549.46
clat (usec): min=3, max=391, avg=169.83, stdev=31.81
lat (usec): min=11, max=407, avg=178.99, stdev=33.49
clat percentiles (usec):
| 1.00th=[ 151], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 159], 40.00th=[ 161], 50.00th=[ 163], 60.00th=[ 165],
| 70.00th=[ 167], 80.00th=[ 172], 90.00th=[ 178], 95.00th=[ 188],
| 99.00th=[ 334], 99.50th=[ 347], 99.90th=[ 359], 99.95th=[ 363],
| 99.99th=[ 367]
bw ( KiB/s): min=163824, max=348176, per=71.80%, avg=256000.00, stdev=130356.55, samples=2
iops : min=40956, max=87044, avg=64000.00, stdev=32589.14, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.53%
lat (usec) : 500=2.45%
cpu : usr=15.55%, sys=84.45%, ctx=1, majf=0, minf=969
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40552,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=407MiB/s (427MB/s), 407MiB/s-407MiB/s (427MB/s-427MB/s), io=158MiB (166MB), run=389-389msec
WRITE: bw=348MiB/s (365MB/s), 348MiB/s-348MiB/s (365MB/s-365MB/s), io=250MiB (262MB), run=718-718msec
Disk stats (read/write):
nullb4: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
+ for i in `seq 0 $NN`
+ fio fio/verify.fio --filename=/dev/nullb5
write-and-verify: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=16
fio-3.27
Starting 1 process
Jobs: 1 (f=1)
write-and-verify: (groupid=0, jobs=1): err= 0: pid=4800: Wed Feb 16 08:39:42 2022
read: IOPS=105k, BW=409MiB/s (429MB/s)(158MiB/385msec)
slat (nsec): min=6682, max=30087, avg=7134.95, stdev=1215.07
clat (usec): min=3, max=257, avg=144.83, stdev=11.35
lat (usec): min=10, max=268, avg=152.01, stdev=11.82
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 141], 10.00th=[ 141], 20.00th=[ 141],
| 30.00th=[ 141], 40.00th=[ 141], 50.00th=[ 141], 60.00th=[ 143],
| 70.00th=[ 145], 80.00th=[ 147], 90.00th=[ 153], 95.00th=[ 155],
| 99.00th=[ 219], 99.50th=[ 229], 99.90th=[ 237], 99.95th=[ 241],
| 99.99th=[ 251]
write: IOPS=89.4k, BW=349MiB/s (366MB/s)(250MiB/716msec); 0 zone resets
slat (nsec): min=7133, max=91994, avg=9065.45, stdev=2530.98
clat (usec): min=3, max=377, avg=169.33, stdev=32.19
lat (usec): min=12, max=394, avg=178.46, stdev=33.88
clat percentiles (usec):
| 1.00th=[ 151], 5.00th=[ 153], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 161], 60.00th=[ 163],
| 70.00th=[ 167], 80.00th=[ 172], 90.00th=[ 178], 95.00th=[ 188],
| 99.00th=[ 334], 99.50th=[ 343], 99.90th=[ 359], 99.95th=[ 359],
| 99.99th=[ 371]
bw ( KiB/s): min=163056, max=348944, per=71.60%, avg=256000.00, stdev=131442.67, samples=2
iops : min=40764, max=87236, avg=64000.00, stdev=32860.67, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.48%
lat (usec) : 500=2.50%
cpu : usr=16.55%, sys=83.36%, ctx=1, majf=0, minf=964
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=40321,64000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
READ: bw=409MiB/s (429MB/s), 409MiB/s-409MiB/s (429MB/s-429MB/s), io=158MiB (165MB), run=385-385msec
WRITE: bw=349MiB/s (366MB/s), 349MiB/s-349MiB/s (366MB/s-366MB/s), io=250MiB (262MB), run=716-716msec
Disk stats (read/write):
nullb5: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
blktests results :-
oot@dev blktests (master) # ./check block
block/001 (stress device hotplugging) [passed]
runtime 91.043s ... 92.441s
block/002 (remove a device while running blktrace) [passed]
runtime 1.852s ... 1.779s
block/006 (run null-blk in blocking mode) [passed]
read iops 359050 ... 363021
runtime 184.498s ... 182.672s
block/009 (check page-cache coherency after BLKDISCARD) [passed]
runtime 1.067s ... 0.968s
block/010 (run I/O on null_blk with shared and non-shared tags) [passed]
Individual tags read iops 445592 ... 450283
runtime 316.587s ... 314.206s
Shared tags read iops 448645 ... 451558
block/014 (run null-blk with blk-mq and timeout injection configured) [not run]
null_blk module does not have parameter timeout
block/015 (run null-blk on different schedulers with requeue injection configured) [not run]
null_blk module does not have parameter requeue
block/016 (send a signal to a process waiting on a frozen queue) [passed]
runtime 7.199s ... 7.209s
block/017 (do I/O and check the inflight counter) [passed]
runtime 1.846s ... 1.854s
block/018 (do I/O and check iostats times) [passed]
runtime 5.323s ... 5.320s
block/020 (run null-blk on different schedulers with only one hardware tag) [passed]
runtime 31.902s ... 31.824s
block/021 (read/write nr_requests on null-blk with different schedulers) [passed]
runtime 4.095s ... 4.062s
block/022 (Test hang caused by freeze/unfreeze sequence) [passed]
runtime 30.249s ... 30.244s
block/023 (do I/O on all null_blk queue modes) [passed]
runtime 0.571s ... 0.639s
block/024 (do I/O faster than a jiffy and check iostats times) [passed]
runtime 3.064s ... 3.038s
block/025 (do a huge discard with 4k sector size) [passed]
runtime 4.404s ... 4.407s
block/027 (stress device hotplugging with running fio jobs and different schedulers) [passed]
runtime 21.100s ... 21.150s
block/028 (do I/O on scsi_debug with DIF/DIX enabled) [passed]
runtime 55.719s ... 58.058s
block/029 (trigger blk_mq_update_nr_hw_queues()) [passed]
runtime 30.520s ... 30.539s
block/030 (trigger the blk_mq_realloc_hw_ctxs() error path) [not run]
null_blk module does not have parameter init_hctx
block/031 (do IO on null-blk with a host tag set) [passed]
runtime 30.503s ... 30.552s
--
2.29.0
