On Mon, Aug 20, 2018 at 07:42:09PM +0800, Ming Lei wrote: > On Mon, Aug 20, 2018 at 06:15:10PM +0800, Ming Lei wrote: > > On Mon, Aug 20, 2018 at 11:56:26AM +0200, Ricardo Ribalda Delgado wrote: > > > Hi > > > On Mon, Aug 20, 2018 at 11:55 AM Ming Lei <ming.lei@xxxxxxxxxx> wrote: > > > > > > > > On Mon, Aug 20, 2018 at 11:04:08AM +0200, Ricardo Ribalda Delgado wrote: > > > > > Hello Ming > > > > > On Mon, Aug 20, 2018 at 10:30 AM Ming Lei <ming.lei@xxxxxxxxxx> wrote: > > > > > > > > > > > > On Mon, Aug 20, 2018 at 09:39:45AM +0200, Ricardo Ribalda Delgado wrote: > > > > > > > Some measurements: > > > > > > > > > > > > > > Please note that even when iostat shows 0.0 the LED on the device was > > > > > > > blinking as if there was some activity going on. > > > > > > > > > > > > > > Thanks! > > > > > > > > > > > > > > KERNEL: > > > > > > > Linux neopili 4.17.0-1-amd64 #1 SMP Debian 4.17.8-1 (2018-07-20) > > > > > > > x86_64 GNU/Linux > > > > > > > > > > > > > > DISK: > > > > > > > [247530.712686] usb 2-2: new SuperSpeed USB device number 3 using xhci_hcd > > > > > > > [247530.738906] usb 2-2: New USB device found, idVendor=174c, > > > > > > > idProduct=5136, bcdDevice= 1.00 > > > > > > > [247530.738913] usb 2-2: New USB device strings: Mfr=2, Product=3, > > > > > > > SerialNumber=1 > > > > > > > [247530.738918] usb 2-2: Product: 91686 > > > > > > > [247530.738921] usb 2-2: Manufacturer: Delock > > > > > > > [247530.738925] usb 2-2: SerialNumber: 300000003B45 > > > > > > > [247530.750709] scsi host6: uas > > > > > > > [247530.751377] scsi 6:0:0:0: Direct-Access ASMT 2105 > > > > > > > 0 PQ: 0 ANSI: 6 > > > > > > > [247530.752174] sd 6:0:0:0: Attached scsi generic sg2 type 0 > > > > > > > [247530.752616] sd 6:0:0:0: [sdb] 31277232 512-byte logical blocks: > > > > > > > (16.0 GB/14.9 GiB) > > > > > > > [247530.752740] sd 6:0:0:0: [sdb] Write Protect is off > > > > > > > [247530.752742] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00 > > > > > > > [247530.752905] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: > > > > > > > enabled, doesn't support DPO or FUA > > > > > > > [247530.755912] sdb: sdb1 sdb2 > > > > > > > [247530.756832] sd 6:0:0:0: [sdb] Attached SCSI disk > > > > > > > > > > > > > > > > > > > > > TL/DR: > > > > > > > CFQ: 21.7 > > > > > > > NOOP: 21.7 > > > > > > > DEADLINE: 21.7 > > > > > > > MQ-DEADLINE: 175.2 > > > > > > > NONE: 236.4 > > > > > > > KYBER: 174.9 > > > > > > > > > > > > Thanks for your test! > > > > > > > > > > > > One problem found from your iostat log is that looks there is ~30sec > > > > > > idle period between IO activities when blk-mq is enabled. > > > > > > > > > > During all the test the LED on the device was blinking. > > > > > > > > > > But a closer look to dmesg reveals a lot of this messages: > > > > > > > > > > [ 196.929811] sd 6:0:0:0: [sdb] tag#3 data cmplt err -71 uas-tag 1 > > > > > inflight: CMD > > > > > > > > -71 is -EPROTO, which is returned from xhci driver, usually it means > > > > there is error from the USB device side. > > > > > > > > > [ 196.929822] sd 6:0:0:0: [sdb] tag#3 CDB: Write(10) 2a 00 00 04 00 > > > > > 68 00 04 00 00 > > > > > [ 227.764379] sd 6:0:0:0: [sdb] tag#4 uas_eh_abort_handler 0 uas-tag > > > > > 2 inflight: CMD OUT > > > > > [ 227.764389] sd 6:0:0:0: [sdb] tag#4 CDB: Write(10) 2a 00 00 04 04 > > > > > 68 00 04 00 00 > > > > > [ 227.766555] sd 6:0:0:0: [sdb] tag#3 uas_eh_abort_handler 0 uas-tag > > > > > 1 inflight: CMD > > > > > [ 227.766562] sd 6:0:0:0: [sdb] tag#3 CDB: Write(10) 2a 00 00 04 00 > > > > > 68 00 04 00 00 > > > > > [ 227.784312] scsi host6: uas_eh_device_reset_handler start > > > > > [ 227.913672] usb 2-2: reset SuperSpeed USB device number 3 using xhci_hcd > > > > > [ 227.944842] scsi host6: uas_eh_device_reset_handler success > > > > > [ 231.416133] sd 6:0:0:0: [sdb] tag#1 data cmplt err -71 uas-tag 10 > > > > > inflight: CMD > > > > > [ 231.416147] sd 6:0:0:0: [sdb] tag#1 CDB: Write(10) 2a 00 00 06 d5 > > > > > e8 00 04 00 00 > > > > > > > > > > And they take around 30 secons (227-196) > > > > > > > > > > > > > > > Maybe this is a hw issue? I will bring the reader home tonight and see > > > > > if I can replicate the bug with my notebook > > > > > > > > It might be. > > > > > > > > Is there such message in case of non-blk-mq? > > > > > > No, only with blk-mq > > > > OK, seems something doesn't work as expected in either scsi_mq or uas > > driver. > > Maybe it is just an uas issue, since I can reproduce the following issue > with either scsi_mq or not on v4.18, and the uas is emulated via qemu. Forget to mention, no need to run bmap-tool, just by the following fio command: fio --direct=1 -size=128G --bsrange=4k-4k --runtime=20 --numjobs=32 --ioengine=libaio --iodepth=64 --group_reporting=1 --filename=/dev/sde --name=/dev/sde-test-randwrite --rw=randwrite Thanks, Ming
