On Mon, Jul 24, 2023 at 04:54:22PM +0800, Evanzhang wrote:
> under heavy workloads,irq_coalesced could up to 30+,
> after modification EXTERNAL_INTERRUPT reduce by 40%
>
> before:
> Analyze events for all VMs, all VCPUs:
> VM-EXITSamples Samples% Time%
>
>EPT_VIOLATI
under heavy workloads,irq_coalesced could up to 30+,
after modification EXTERNAL_INTERRUPT reduce by 40%
before:
Analyze events for all VMs, all VCPUs:
VM-EXITSamples Samples% Time%
EPT_VIOLATION983398463.41%15.96%
IO_INSTRUCTION216084313.93%
1.hw/rtc/mc146818rtc.c:48
open #define DEBUG_COALESCEDOD
2.create win7 4u 4g vm
3.Play 1080p video full screen
4.observe qemu log message
DPRINTF_C("cmos: coalesced irqs decreased to %d\n",
s->irq_coalesced);
4.perf kvm stat record -a -p $(pidof qemu-kvm) sleep 600
perf kvm stat report --ev
