Hi, On 2020-12-10 23:12:15 +0000, Pavel Begunkov wrote: > Can you get poll stats from debugfs while running with hybrid? > For both iodepth=1 and 32. > > cat <debugfs>/block/nvme1n1/poll_stat Sure. QD1: read (512 Bytes): samples=2, mean=6673855, min=68005, max=13279705 write (512 Bytes): samples=1, mean=13232585, min=13232585, max=13232585 read (1024 Bytes): samples=0 write (1024 Bytes): samples=4, mean=4968280, min=4815727, max=5121434 read (2048 Bytes): samples=0 write (2048 Bytes): samples=2, mean=2090473, min=2089735, max=2091212 read (4096 Bytes): samples=3, mean=75684, min=68069, max=88749 write (4096 Bytes): samples=9901, mean=7424, min=6636, max=27371 read (8192 Bytes): samples=12, mean=1178627, min=59709, max=13310383 write (8192 Bytes): samples=1, mean=13231993, min=13231993, max=13231993 read (16384 Bytes): samples=1, mean=13376610, min=13376610, max=13376610 write (16384 Bytes): samples=1, mean=13230532, min=13230532, max=13230532 read (32768 Bytes): samples=12, mean=128980, min=81628, max=173096 write (32768 Bytes): samples=1, mean=13240766, min=13240766, max=13240766 read (65536 Bytes): samples=1, mean=234465, min=234465, max=234465 write (65536 Bytes): samples=3, mean=4224941, min=66043, max=12534481 QD32: read (512 Bytes): samples=2, mean=6673855, min=68005, max=13279705 write (512 Bytes): samples=1, mean=13232585, min=13232585, max=13232585 read (1024 Bytes): samples=0 write (1024 Bytes): samples=4, mean=4614410, min=4576806, max=4652813 read (2048 Bytes): samples=0 write (2048 Bytes): samples=2, mean=2090473, min=2089735, max=2091212 read (4096 Bytes): samples=3, mean=75684, min=68069, max=88749 write (4096 Bytes): samples=32, mean=6155072604, min=6155008198, max=6155132851 read (8192 Bytes): samples=12, mean=1178627, min=59709, max=13310383 write (8192 Bytes): samples=1, mean=13231993, min=13231993, max=13231993 read (16384 Bytes): samples=1, mean=13376610, min=13376610, max=13376610 write (16384 Bytes): samples=1, mean=13230532, min=13230532, max=13230532 read (32768 Bytes): samples=12, mean=128980, min=81628, max=173096 write (32768 Bytes): samples=1, mean=13240766, min=13240766, max=13240766 read (65536 Bytes): samples=1, mean=234465, min=234465, max=234465 write (65536 Bytes): samples=3, mean=4224941, min=66043, max=12534481 I also saw [1036471.387012] nvme nvme1: I/O 576 QID 32 timeout, aborting [1036471.387123] nvme nvme1: Abort status: 0x0 during one of the QD32 runs just now. But not in all. - Andres
