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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/device/1847861')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/device/1847861 | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/device/1847861 b/results/classifier/deepseek-2-tmp/output/device/1847861 deleted file mode 100644 index 99a418c2..00000000 --- a/results/classifier/deepseek-2-tmp/output/device/1847861 +++ /dev/null @@ -1,31 +0,0 @@ - -Guest stuttering under high disk IO (virtio) - -Performing io intensive tasks on virtualized Windows causes the system to visually stutter. I can often reproduce the problem by running fio on windows: - -fio --randrepeat=1 --ioengine=windowsaio --direct=1 --gtod_reduce=1 --name=test --filename=\\.\PhysicalDrive0 --bs=4k --iodepth=128 --size=4G --readwrite=randread - -While the fio command is running, moving the mouse pointer will be be laggy. The stuttering does not appear with iodepth <= 32 . The stuttering also manifests while playing games, the music and video pauses for a fraction of second in a playable but disturbing way. - -Here are my system specs: - -Host OS: archlinux -Guest OS: Windows 10 Enterprise -qemu version: qemu-git 8:v4.1.0.r1378.g98b2e3c9ab-1 (from AUR, compiled with -march=native) -CPU: AMD Ryzen Threadripper 1900X 8-Core Processor -Huge Pages: vm.nr_hugepages=4128 -Disk: nvme type=raw, io=threads bus=virtio -GPU (passthrough): Radeon RX 570 - -Here are some fio test results on my windows guest: - -[size=512M,iodepth=1 -> min=30k,avg=31k,stddev=508] -[size=2G,iodepth=8 -> min=203k,avg=207k,stddev=2.3k] -[size=2G,iodepth=16 -> min=320k,avg=330k,stddev=4.3k] -[size=4G,iodepth=32 -> min=300k,avg=310k,stddev=4.8k] -[size=4G,iodepth=64 -> min=278k,avg=366k,stddev=68.6k] -> STUTTER -[size=4G,iodepth=64 -> min=358k,avg=428k,stddev=52.6k] -> STUTTER -[size=4G,iodepth=128 -> min=92k,avg=217k,stddev=185k] -> STUTTER -[size=4G,iodepth=128 -> min=241k,avg=257k,stddev=14k] -> same config as above, but no stuttering - -The min and avg values are the bandwidth values reported in KB/s by fio. You can see that, when the stuttering occurs, the stardard deviation is high and the minimum bandwidth is way below the average. \ No newline at end of file |