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
summery:-
# grep err= p/null-blk-alloc-cmd/0000-cover-letter.patch
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147181: Wed Feb 16 00:09:07 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147184: Wed Feb 16 00:09:09 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147187: Wed Feb 16 00:09:10 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147190: Wed Feb 16 00:09:11 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147193: Wed Feb 16 00:09:13 2022
write-and-verify: (groupid=0, jobs=1): err= 0: pid=147196: Wed Feb 16 00:09:14 2022
-ck
Chaitanya Kulkarni (2):
null_blk: remove hardcoded alloc_cmd() parameter
null_blk: remove local var & init cmd in alloc_cmd
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):
root@dev linux-block (for-next) # git am p/null-blk-alloc-cmd/*patch ; git am --skip
Patch is empty.
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Applying: null_blk: remove hardcoded alloc_cmd() parameter
Applying: null_blk: remove local var & init cmd in alloc_cmd
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 00:08 /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
[40716.294759] 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=147181: Wed Feb 16 00:09:07 2022
read: IOPS=106k, BW=415MiB/s (436MB/s)(158MiB/381msec)
slat (usec): min=6, max=264, avg= 6.98, stdev= 1.71
clat (usec): min=3, max=991, avg=142.46, stdev=20.06
lat (usec): min=10, max=998, avg=149.48, stdev=20.15
clat percentiles (usec):
| 1.00th=[ 137], 5.00th=[ 139], 10.00th=[ 139], 20.00th=[ 139],
| 30.00th=[ 139], 40.00th=[ 139], 50.00th=[ 139], 60.00th=[ 141],
| 70.00th=[ 141], 80.00th=[ 145], 90.00th=[ 153], 95.00th=[ 157],
| 99.00th=[ 163], 99.50th=[ 167], 99.90th=[ 388], 99.95th=[ 404],
| 99.99th=[ 996]
write: IOPS=90.9k, BW=355MiB/s (372MB/s)(250MiB/704msec); 0 zone resets
slat (usec): min=7, max=575, avg= 8.93, stdev= 3.38
clat (usec): min=3, max=936, avg=166.52, stdev=34.55
lat (usec): min=11, max=956, avg=175.51, stdev=36.35
clat percentiles (usec):
| 1.00th=[ 149], 5.00th=[ 151], 10.00th=[ 153], 20.00th=[ 155],
| 30.00th=[ 155], 40.00th=[ 157], 50.00th=[ 159], 60.00th=[ 159],
| 70.00th=[ 163], 80.00th=[ 167], 90.00th=[ 176], 95.00th=[ 186],
| 99.00th=[ 338], 99.50th=[ 351], 99.90th=[ 367], 99.95th=[ 371],
| 99.99th=[ 930]
bw ( KiB/s): min=156416, max=354874, per=70.30%, avg=255645.00, stdev=140331.00, samples=2
iops : min=39104, max=88718, avg=63911.00, stdev=35082.40, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.47%
lat (usec) : 500=2.48%, 1000=0.03%
cpu : usr=15.59%, sys=84.23%, ctx=6, 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=40522,64000,0,0 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=415MiB/s (436MB/s), 415MiB/s-415MiB/s (436MB/s-436MB/s), io=158MiB (166MB), run=381-381msec
WRITE: bw=355MiB/s (372MB/s), 355MiB/s-355MiB/s (372MB/s-372MB/s), io=250MiB (262MB), run=704-704msec
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=147184: Wed Feb 16 00:09:09 2022
read: IOPS=104k, BW=408MiB/s (428MB/s)(158MiB/387msec)
slat (nsec): min=6572, max=89550, avg=7113.54, stdev=2792.32
clat (usec): min=3, max=465, avg=145.00, stdev=15.42
lat (usec): min=10, max=472, avg=152.16, stdev=15.88
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 139], 10.00th=[ 139], 20.00th=[ 141],
| 30.00th=[ 141], 40.00th=[ 141], 50.00th=[ 141], 60.00th=[ 141],
| 70.00th=[ 143], 80.00th=[ 145], 90.00th=[ 157], 95.00th=[ 159],
| 99.00th=[ 212], 99.50th=[ 225], 99.90th=[ 314], 99.95th=[ 322],
| 99.99th=[ 433]
write: IOPS=88.9k, BW=347MiB/s (364MB/s)(250MiB/720msec); 0 zone resets
slat (nsec): min=6993, max=96042, avg=9156.56, stdev=2720.33
clat (usec): min=3, max=450, avg=170.31, stdev=34.71
lat (usec): min=12, max=470, avg=179.53, stdev=36.55
clat percentiles (usec):
| 1.00th=[ 151], 5.00th=[ 153], 10.00th=[ 155], 20.00th=[ 157],
| 30.00th=[ 157], 40.00th=[ 159], 50.00th=[ 161], 60.00th=[ 163],
| 70.00th=[ 165], 80.00th=[ 172], 90.00th=[ 182], 95.00th=[ 241],
| 99.00th=[ 343], 99.50th=[ 351], 99.90th=[ 379], 99.95th=[ 396],
| 99.99th=[ 429]
bw ( KiB/s): min=161568, max=350432, per=72.00%, avg=256000.00, stdev=133547.02, samples=2
iops : min=40392, max=87608, avg=64000.00, stdev=33386.75, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.09%
lat (usec) : 500=2.89%
cpu : usr=16.73%, sys=83.18%, ctx=1, majf=0, minf=967
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=40429,64000,0,0 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=158MiB (166MB), run=387-387msec
WRITE: bw=347MiB/s (364MB/s), 347MiB/s-347MiB/s (364MB/s-364MB/s), io=250MiB (262MB), run=720-720msec
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=147187: Wed Feb 16 00:09:10 2022
read: IOPS=107k, BW=417MiB/s (437MB/s)(158MiB/379msec)
slat (nsec): min=6542, max=27301, avg=6923.84, stdev=1079.78
clat (usec): min=3, max=3044, avg=141.83, stdev=56.14
lat (usec): min=10, max=3051, avg=148.80, stdev=56.16
clat percentiles (usec):
| 1.00th=[ 137], 5.00th=[ 139], 10.00th=[ 139], 20.00th=[ 139],
| 30.00th=[ 139], 40.00th=[ 139], 50.00th=[ 139], 60.00th=[ 139],
| 70.00th=[ 139], 80.00th=[ 143], 90.00th=[ 151], 95.00th=[ 155],
| 99.00th=[ 159], 99.50th=[ 161], 99.90th=[ 169], 99.95th=[ 176],
| 99.99th=[ 3032]
write: IOPS=90.4k, BW=353MiB/s (370MB/s)(250MiB/708msec); 0 zone resets
slat (usec): min=7, max=109, avg= 8.98, stdev= 2.98
clat (usec): min=3, max=437, avg=167.45, stdev=35.25
lat (usec): min=11, max=456, avg=176.50, stdev=37.09
clat percentiles (usec):
| 1.00th=[ 149], 5.00th=[ 151], 10.00th=[ 151], 20.00th=[ 153],
| 30.00th=[ 155], 40.00th=[ 157], 50.00th=[ 159], 60.00th=[ 161],
| 70.00th=[ 163], 80.00th=[ 169], 90.00th=[ 178], 95.00th=[ 235],
| 99.00th=[ 343], 99.50th=[ 355], 99.90th=[ 404], 99.95th=[ 416],
| 99.99th=[ 429]
bw ( KiB/s): min=160240, max=351760, per=70.80%, avg=256000.00, stdev=135425.09, samples=2
iops : min=40060, max=87940, avg=64000.00, stdev=33856.27, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.36%
lat (usec) : 500=2.60%
lat (msec) : 4=0.01%
cpu : usr=15.30%, sys=84.42%, ctx=3, majf=0, minf=967
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=40438,64000,0,0 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=417MiB/s (437MB/s), 417MiB/s-417MiB/s (437MB/s-437MB/s), io=158MiB (166MB), run=379-379msec
WRITE: bw=353MiB/s (370MB/s), 353MiB/s-353MiB/s (370MB/s-370MB/s), io=250MiB (262MB), run=708-708msec
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=147190: Wed Feb 16 00:09:11 2022
read: IOPS=108k, BW=422MiB/s (442MB/s)(159MiB/376msec)
slat (nsec): min=6533, max=32571, avg=6916.65, stdev=1061.06
clat (usec): min=3, max=171, avg=140.45, stdev= 5.74
lat (usec): min=10, max=178, avg=147.41, stdev= 5.88
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=[ 139],
| 70.00th=[ 139], 80.00th=[ 143], 90.00th=[ 151], 95.00th=[ 155],
| 99.00th=[ 157], 99.50th=[ 159], 99.90th=[ 165], 99.95th=[ 165],
| 99.99th=[ 172]
write: IOPS=91.8k, BW=359MiB/s (376MB/s)(250MiB/697msec); 0 zone resets
slat (nsec): min=7034, max=78768, avg=8833.05, stdev=2474.79
clat (usec): min=3, max=370, avg=164.93, stdev=32.58
lat (usec): min=11, max=387, avg=173.82, stdev=34.29
clat percentiles (usec):
| 1.00th=[ 147], 5.00th=[ 149], 10.00th=[ 151], 20.00th=[ 153],
| 30.00th=[ 155], 40.00th=[ 155], 50.00th=[ 157], 60.00th=[ 159],
| 70.00th=[ 161], 80.00th=[ 165], 90.00th=[ 176], 95.00th=[ 184],
| 99.00th=[ 338], 99.50th=[ 347], 99.90th=[ 355], 99.95th=[ 359],
| 99.99th=[ 363]
bw ( KiB/s): min=152648, max=359352, per=69.70%, avg=256000.00, stdev=146161.80, samples=2
iops : min=38162, max=89838, avg=64000.00, stdev=36540.45, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.62%
lat (usec) : 500=2.36%
cpu : usr=16.79%, sys=83.21%, 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=40603,64000,0,0 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=422MiB/s (442MB/s), 422MiB/s-422MiB/s (442MB/s-442MB/s), io=159MiB (166MB), run=376-376msec
WRITE: bw=359MiB/s (376MB/s), 359MiB/s-359MiB/s (376MB/s-376MB/s), io=250MiB (262MB), run=697-697msec
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=147193: Wed Feb 16 00:09:13 2022
read: IOPS=107k, BW=418MiB/s (439MB/s)(158MiB/378msec)
slat (nsec): min=6573, max=29957, avg=6952.35, stdev=1092.02
clat (usec): min=3, max=215, avg=141.35, stdev= 6.36
lat (usec): min=10, max=225, avg=148.35, stdev= 6.51
clat percentiles (usec):
| 1.00th=[ 137], 5.00th=[ 139], 10.00th=[ 139], 20.00th=[ 139],
| 30.00th=[ 139], 40.00th=[ 139], 50.00th=[ 139], 60.00th=[ 139],
| 70.00th=[ 141], 80.00th=[ 143], 90.00th=[ 153], 95.00th=[ 157],
| 99.00th=[ 161], 99.50th=[ 165], 99.90th=[ 174], 99.95th=[ 192],
| 99.99th=[ 212]
write: IOPS=90.4k, BW=353MiB/s (370MB/s)(250MiB/708msec); 0 zone resets
slat (nsec): min=7033, max=86665, avg=8993.79, stdev=2568.28
clat (usec): min=3, max=377, avg=167.49, stdev=33.02
lat (usec): min=11, max=397, avg=176.55, stdev=34.75
clat percentiles (usec):
| 1.00th=[ 149], 5.00th=[ 151], 10.00th=[ 153], 20.00th=[ 155],
| 30.00th=[ 155], 40.00th=[ 157], 50.00th=[ 159], 60.00th=[ 161],
| 70.00th=[ 163], 80.00th=[ 169], 90.00th=[ 178], 95.00th=[ 204],
| 99.00th=[ 338], 99.50th=[ 347], 99.90th=[ 359], 99.95th=[ 359],
| 99.99th=[ 371]
bw ( KiB/s): min=158648, max=353352, per=70.80%, avg=256000.00, stdev=137676.52, samples=2
iops : min=39662, max=88338, avg=64000.00, stdev=34419.13, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=97.45%
lat (usec) : 500=2.53%
cpu : usr=16.42%, sys=83.58%, ctx=3, majf=0, minf=967
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=40484,64000,0,0 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=418MiB/s (439MB/s), 418MiB/s-418MiB/s (439MB/s-439MB/s), io=158MiB (166MB), run=378-378msec
WRITE: bw=353MiB/s (370MB/s), 353MiB/s-353MiB/s (370MB/s-370MB/s), io=250MiB (262MB), run=708-708msec
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=147196: Wed Feb 16 00:09:14 2022
read: IOPS=106k, BW=413MiB/s (433MB/s)(158MiB/383msec)
slat (nsec): min=6582, max=79441, avg=7054.21, stdev=1404.54
clat (usec): min=3, max=362, avg=143.50, stdev=10.11
lat (usec): min=10, max=378, avg=150.60, stdev=10.45
clat percentiles (usec):
| 1.00th=[ 139], 5.00th=[ 139], 10.00th=[ 139], 20.00th=[ 139],
| 30.00th=[ 141], 40.00th=[ 141], 50.00th=[ 141], 60.00th=[ 141],
| 70.00th=[ 143], 80.00th=[ 145], 90.00th=[ 157], 95.00th=[ 161],
| 99.00th=[ 169], 99.50th=[ 174], 99.90th=[ 273], 99.95th=[ 318],
| 99.99th=[ 334]
write: IOPS=91.7k, BW=358MiB/s (376MB/s)(250MiB/698msec); 0 zone resets
slat (nsec): min=7104, max=68841, avg=8834.00, stdev=2372.91
clat (usec): min=3, max=388, avg=165.07, stdev=27.10
lat (usec): min=11, max=407, avg=173.97, stdev=28.46
clat percentiles (usec):
| 1.00th=[ 149], 5.00th=[ 151], 10.00th=[ 153], 20.00th=[ 155],
| 30.00th=[ 155], 40.00th=[ 157], 50.00th=[ 159], 60.00th=[ 161],
| 70.00th=[ 163], 80.00th=[ 169], 90.00th=[ 178], 95.00th=[ 186],
| 99.00th=[ 322], 99.50th=[ 355], 99.90th=[ 371], 99.95th=[ 375],
| 99.99th=[ 383]
bw ( KiB/s): min=149928, max=362072, per=69.80%, avg=256000.00, stdev=150008.46, samples=2
iops : min=37482, max=90518, avg=64000.00, stdev=37502.12, samples=2
lat (usec) : 4=0.01%, 20=0.01%, 50=0.01%, 100=0.01%, 250=98.32%
lat (usec) : 500=1.65%
cpu : usr=16.03%, sys=83.87%, ctx=2, 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=40473,64000,0,0 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=358MiB/s (376MB/s), 358MiB/s-358MiB/s (376MB/s-376MB/s), io=250MiB (262MB), run=698-698msec
Disk stats (read/write):
nullb5: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
blktests results :-
root@dev blktests (master) # ./check block
block/001 (stress device hotplugging) [passed]
runtime 89.813s ... 91.043s
block/002 (remove a device while running blktrace) [passed]
runtime 1.824s ... 1.852s
block/006 (run null-blk in blocking mode) [passed]
read iops 364023 ... 359050
runtime 181.911s ... 184.498s
block/009 (check page-cache coherency after BLKDISCARD) [passed]
runtime 0.926s ... 1.067s
block/010 (run I/O on null_blk with shared and non-shared tags) [passed]
Individual tags read iops 448837 ... 445592
runtime 315.205s ... 316.587s
Shared tags read iops 449357 ... 448645
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 7.201s ... 7.199s
block/017 (do I/O and check the inflight counter) [passed]
runtime 1.845s ... 1.846s
block/018 (do I/O and check iostats times) [passed]
runtime 5.316s ... 5.323s
block/020 (run null-blk on different schedulers with only one hardware tag) [passed]
runtime 31.868s ... 31.902s
block/021 (read/write nr_requests on null-blk with different schedulers) [passed]
runtime 4.234s ... 4.095s
block/022 (Test hang caused by freeze/unfreeze sequence) [passed]
runtime 30.287s ... 30.249s
block/023 (do I/O on all null_blk queue modes) [passed]
runtime 0.580s ... 0.571s
block/024 (do I/O faster than a jiffy and check iostats times) [passed]
runtime 3.042s ... 3.064s
block/025 (do a huge discard with 4k sector size) [passed]
runtime 4.419s ... 4.404s
block/027 (stress device hotplugging with running fio jobs and different schedulers) [passed]
runtime 21.121s ... 21.100s
block/028 (do I/O on scsi_debug with DIF/DIX enabled) [passed]
runtime 55.964s ... 55.719s
block/029 (trigger blk_mq_update_nr_hw_queues()) [passed]
runtime 30.547s ... 30.520s
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 30.512s ... 30.503s
--
2.29.0
