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We have to process whole QoS queue on each QoS poll. It may contain IOs that still have quota or not affected by QoS rules at all. If we stop on the first queued IO, all IOs will be limited by the minimum QoS rule even if they're not affected by this rule. Here is an example and simple test. We have a NVMf target with Null bdev and QoS configured with read bandwidth limited to 10 MB/s and write bandwidth limited to 100 MB/s. First we start nvme_perf with only write IOs and we see that reported bandwidth is 100 MB/s. Then we start another instance of nvme_perf with only read IOs. We see that reported read bandwidth is 10 MB/s but we also see that write bandwidth also drops to 10 MB/s. Signed-off-by: Evgeniy Kochetov <evgeniik@nvidia.com> Change-Id: I1edf09d038e65f873deef19ecb0f4bf9725a5ca5 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13767 Community-CI: Mellanox Build Bot Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com> Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com> Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com> |
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| .. | ||
| bdev_internal.h | ||
| bdev_rpc.c | ||
| bdev_zone.c | ||
| bdev.c | ||
| Makefile | ||
| part.c | ||
| scsi_nvme.c | ||
| spdk_bdev.map | ||
| vtune.c | ||