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Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/1718.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/1718.toml | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/1718.toml b/gitlab/issues/target_missing/host_missing/accel_missing/1718.toml deleted file mode 100644 index d8b1c2273..000000000 --- a/gitlab/issues/target_missing/host_missing/accel_missing/1718.toml +++ /dev/null @@ -1,57 +0,0 @@ -id = 1718 -title = "Strange throttle-group test results" -state = "opened" -created_at = "2023-06-20T08:54:56.813Z" -closed_at = "n/a" -labels = [] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1718" -host-os = "Ubuntu 22.04.1 LTS" -host-arch = "x86" -qemu-version = "7.2.0" -guest-os = "CentOS Linux release 7.9" -guest-arch = "x86" -description = """I have a question about throttle-group test results. - -I did a test to limit IO by applying THROTTLE-GROUP and the expected result is not what I expected - -The setup environment looks like this throttle-group to x-iops-total=500, x-bps-total=524288000 and throttling vdb, benchmarked with fio command - -``` -# mount -t xfs /dev/vdb1 /mnt/disk - -# fio --direct=1 --bs=1M --iodepth=128 --rw=read --size=1G --numjobs=1 --runtime=600 --time_based --name=/mnt/disk/fio-file --ioengine=libaio --output=/mnt/disk/read-1M -``` - -When I test with a --bs value of 1M, I get 500Mib throughput. - - - -When I test with a --bs value of 2m, I don't get 500Mibs but 332Mibs throughput. -``` -fio --direct=1 --bs=2M --iodepth=128 --rw=read --size=1G --numjobs=1 --runtime=600 --time_based --name=/mnt/disk/fio-file --ioengine=libaio --output=/mnt/disk/read-2M -``` - - - -If I set the qemu x-iops-total value to 1500 and the fio --bs value to 2M test again, I get 500Mib throughput. - - - - -To summarize, here is the Test result. - -| fio bs | qemu x-iops-total | qemu x-bps-total | Result iops |Result throughput -| ------ | ------ |------ |------ |------ | -| 2M | 1500 | 524288000 | 250 | 500 | -| **2M** |**500** | **524288000** | **166** | **332** | -| 1M | 1500 | 524288000 | 500 | 500 | -| 1M | 500. | 524288000 | 500 | 500 | - - -When the --bs value is 2M and the x-iops-total value is 500, the throughput should be 500, but it is not, so I don't know what the problem is. - -If there is anything I missed, please let me know.""" -reproduce = """1. Apply throttle-group to vdb and start the VM -2. mount vdb1 -3. test fio""" -additional = "n/a" |