Displaying 5 results from an estimated 5 matches for "io_wqe_work".
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io_wq_work
2020 May 01
0
io_uring cause data corruption
...###### WITH IO_URING ######
# iotop -o
Total DISK READ :????? 77.47 M/s | Total DISK WRITE : 0.00 B/s
Actual DISK READ:????? 77.61 M/s | Actual DISK WRITE: 0.00 B/s
? TID? PRIO? USER???? DISK READ? DISK WRITE? SWAPIN IO>??? COMMAND
29984 be/4 root??????? 8.36 M/s??? 0.00 B/s? 0.00 % 20.21 %
[io_wqe_worker-1]
29986 be/4 root??????? 9.55 M/s??? 0.00 B/s? 0.00 % 19.44 %
[io_wqe_worker-1]
29983 be/4 root??????? 4.37 M/s??? 0.00 B/s? 0.00 % 18.47 %
[io_wqe_worker-0]
29981 be/4 root??????? 9.26 M/s??? 0.00 B/s? 0.00 % 17.94 %
[io_wqe_worker-0]
29980 be/4 root??????? 5.53 M/s??? 0.00 B/s? 0.00 % 17.85...
2020 Apr 30
2
io_uring cause data corruption
On Thu, Apr 30, 2020 at 10:25:49AM +0200, A L wrote:
> So I did some more tests. smbclient mget does not copy in the same way
> Windows Explorer does. When copying in Windows Explorer, there are many
> multiple concurrent threads used to transfer the files. With smbclient mget
> there are no corruptions, both locally and over the network from another
> Linux machine.
>
> I
2020 May 01
3
io_uring cause data corruption
On Fri, May 01, 2020 at 09:27:58PM +0200, A L via samba wrote:
> > Jeremy.
> I did not use a command line, but rather File Explorer
> 1) In File explorer, go to \\SAMBA\share_io_uring\
> 2) Select folder "test2-ro" and choose copy
> 3) Paste to a local drive
>
> The amount of files not working seems to vary, but usually within the 10
> first copied files. You
2020 May 02
2
io_uring cause data corruption
...ing settings.
>
> io_uring:sqpoll = true/false
> io_uring:num_entries = 2, 4, 8, 64, 128 (default), 256
>
> Between each test i do "echo 3 > /proc/sys/vm/drop_caches" and restart the
> samba service.
>
> One difference I noticed is that there is now only one [io_wqe_worker-0] io
> thread active when copying from this USB disk. This is probably because it
> is so slow, about 25MB/s maximum read speed. This seems to have an impact on
> where the corruptions happen in the files. All files have a corrupt/zeroed
> block at the end of the file, 99% of the tim...
2020 May 02
0
io_uring cause data corruption
...lso tried various combinations of io_uring settings.
io_uring:sqpoll = true/false
io_uring:num_entries = 2, 4, 8, 64, 128 (default), 256
Between each test i do "echo 3 > /proc/sys/vm/drop_caches" and restart
the samba service.
One difference I noticed is that there is now only one [io_wqe_worker-0]
io thread active when copying from this USB disk. This is probably
because it is so slow, about 25MB/s maximum read speed. This seems to
have an impact on where the corruptions happen in the files. All files
have a corrupt/zeroed block at the end of the file, 99% of the time at
the same p...