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qm: IO-Thread: rework and add a bit more context

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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Thomas Lamprecht 2022-12-21 14:48:10 +01:00
parent bcb4e590fb
commit afb9056593
1 changed files with 4 additions and 4 deletions
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@ -253,10 +253,10 @@ The option *IO Thread* can only be used when using a disk with the *VirtIO*
controller, or with the *SCSI* controller, when the emulated controller type is
*VirtIO SCSI single*. With *IO Thread* enabled, QEMU creates one I/O thread per
storage controller, rather than handling all I/O in the main event loop or vCPU
threads. This can increase performance, because of improved work distribution
and also avoid hangs under very I/O-intensive host workloads, because other
threads won't be blocked waiting for I/O.
threads. One benefit is better work distribution and utilization of the
underlying storage. Another benefit is reduced latency (hangs) in the guest for
very I/O-intensive host workloads, since neither the main thread nor a vCPU
thread can be blocked by disk I/O.
[[qm_cpu]]
CPU