Re: [PATCH] irqchip/gic-v4.1: Optimize the wait for the completion of the analysis of the VPT

Shenming, Somehow this patch ended up in the wrong folder. Apologies for the delay reviewing it. On 2020-09-23 07:35, Shenming Lu wrote: Right after a vPE is made resident, the code starts polling the GICR_VPENDBASER.Dirty bit until it becomes 0, where the delay_us is set to 10. But in our meas

Re: [PATCH] irqchip/gic-v4.1: Optimize the wait for the completion of the analysis of the VPT

On 2020/11/28 3:35, Marc Zyngier wrote: > Shenming, > > Somehow this patch ended up in the wrong folder. > Apologies for the delay reviewing it.> > On 2020-09-23 07:35, Shenming Lu wrote: >> Right after a vPE is made resident, the code starts polling the >> GICR_VPENDBASER.Dirty bit until it becom

Re: [PATCH] irqchip/gic-v4.1: Optimize the wait for the completion of the analysis of the VPT

Hi Marc, Friendly ping, it is some time since I sent this patch according to your last advice... Besides, recently we found that the mmio delay on GICv4.1 system is about 10 times higher than that on GICv4.0 system in kvm-unit-tests (the specific data is as follows). By the way, HiSilicon GICv

[PATCH] irqchip/gic-v4.1: Optimize the wait for the completion of the analysis of the VPT

Right after a vPE is made resident, the code starts polling the GICR_VPENDBASER.Dirty bit until it becomes 0, where the delay_us is set to 10. But in our measurement, it takes only hundreds of nanoseconds, or 1~2 microseconds, to finish parsing the VPT in most cases. And we also measured the time f