> Subject: Re: arm-smmu-v3 high cpu usage for NVMe
>
> On 20/03/2020 10:41, John Garry wrote:
>
> + Barry, Alexandru
>
> >>>>> PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost:
> >>>>> 0/34434
On 20/03/2020 10:41, John Garry wrote:
+ Barry, Alexandru
PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost:
0/34434 drop:
0/40116 [4000Hz cycles], (all, 96 CPUs)
On 02/04/2020 13:10, John Garry wrote:
On 18/03/2020 20:53, Will Deacon wrote:
As for arm_smmu_cmdq_issue_cmdlist(), I do note that during the
testing our
batch size is 1, so we're not seeing the real benefit of the batching. I
can't help but think that we could improve this code to try to
FWIW I believe is is still on the plan for someone here to dust off
the PMU pNMI patches at some point.
Cool. Well I can try to experiment with what Julien had at v4 for now.
JFYI, I have done some more perf record capturing, and updated the
"annotate" and "report" output here
On 24/03/2020 12:07, Robin Murphy wrote:
On 2020-03-24 11:55 am, John Garry wrote:
On 24/03/2020 10:43, Marc Zyngier wrote:
On Tue, 24 Mar 2020 09:18:10 +
John Garry wrote:
On 23/03/2020 09:16, Marc Zyngier wrote:
+ Julien, Mark
Hi Marc,
Time to enable pseudo-NMIs in the PMUv3
On 2020-03-24 11:55 am, John Garry wrote:
On 24/03/2020 10:43, Marc Zyngier wrote:
On Tue, 24 Mar 2020 09:18:10 +
John Garry wrote:
On 23/03/2020 09:16, Marc Zyngier wrote:
+ Julien, Mark
Hi Marc,
Time to enable pseudo-NMIs in the PMUv3 driver...
Do you know if there is any plan
On 24/03/2020 10:43, Marc Zyngier wrote:
On Tue, 24 Mar 2020 09:18:10 +
John Garry wrote:
On 23/03/2020 09:16, Marc Zyngier wrote:
+ Julien, Mark
Hi Marc,
Time to enable pseudo-NMIs in the PMUv3 driver...
Do you know if there is any plan for this?
There was. Julien Thierry has a
On Tue, 24 Mar 2020 09:18:10 +
John Garry wrote:
> On 23/03/2020 09:16, Marc Zyngier wrote:
>
> + Julien, Mark
>
> Hi Marc,
>
> >>> Time to enable pseudo-NMIs in the PMUv3 driver...
> >>>
> >>
> >> Do you know if there is any plan for this?
> >
> > There was. Julien Thierry has a bunch
On 23/03/2020 09:16, Marc Zyngier wrote:
+ Julien, Mark
Hi Marc,
Time to enable pseudo-NMIs in the PMUv3 driver...
Do you know if there is any plan for this?
There was. Julien Thierry has a bunch of patches for that [1], but they
needs
reviving.
So those patches still apply cleanly
On 2020-03-23 09:03, John Garry wrote:
On 20/03/2020 16:33, Marc Zyngier wrote:
JFYI, I've been playing for "perf annotate" today and it's giving
strange results for my NVMe testing. So "report" looks somewhat sane,
if not a worryingly high % for arm_smmu_cmdq_issue_cmdlist():
55.39%
On 20/03/2020 16:33, Marc Zyngier wrote:
JFYI, I've been playing for "perf annotate" today and it's giving
strange results for my NVMe testing. So "report" looks somewhat sane,
if not a worryingly high % for arm_smmu_cmdq_issue_cmdlist():
55.39% irq/342-nvme0q1 [kernel.kallsyms] [k]
Hi John,
On 2020-03-20 16:20, John Garry wrote:
I've run a bunch of netperf instances on multiple cores and
collecting
SMMU usage (on TaiShan 2280). I'm getting the following ratio pretty
consistently.
- 6.07% arm_smmu_iotlb_sync
- 5.74% arm_smmu_tlb_inv_range
5.09%
I've run a bunch of netperf instances on multiple cores and collecting
SMMU usage (on TaiShan 2280). I'm getting the following ratio pretty
consistently.
- 6.07% arm_smmu_iotlb_sync
- 5.74% arm_smmu_tlb_inv_range
5.09% arm_smmu_cmdq_issue_cmdlist
0.28% __pi_memset
On Fri, Mar 20, 2020 at 10:41:44AM +, John Garry wrote:
> On 19/03/2020 18:43, Jean-Philippe Brucker wrote:
> > On Thu, Mar 19, 2020 at 12:54:59PM +, John Garry wrote:
> > > Hi Will,
> > >
> > > >
> > > > On Thu, Jan 02, 2020 at 05:44:39PM +, John Garry wrote:
> > > > > And for the
On 19/03/2020 18:43, Jean-Philippe Brucker wrote:
On Thu, Mar 19, 2020 at 12:54:59PM +, John Garry wrote:
Hi Will,
On Thu, Jan 02, 2020 at 05:44:39PM +, John Garry wrote:
And for the overall system, we have:
PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost: 0/34434
On Thu, Mar 19, 2020 at 12:54:59PM +, John Garry wrote:
> Hi Will,
>
> >
> > On Thu, Jan 02, 2020 at 05:44:39PM +, John Garry wrote:
> > > And for the overall system, we have:
> > >
> > >PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost: 0/34434
> > > drop:
> > > 0/40116
Hi Will,
On Thu, Jan 02, 2020 at 05:44:39PM +, John Garry wrote:
And for the overall system, we have:
PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost: 0/34434 drop:
0/40116 [4000Hz cycles], (all, 96 CPUs)
Hi John,
On Thu, Jan 02, 2020 at 05:44:39PM +, John Garry wrote:
> And for the overall system, we have:
>
> PerfTop: 85864 irqs/sec kernel:89.6% exact: 0.0% lost: 0/34434 drop:
> 0/40116 [4000Hz cycles], (all, 96 CPUs)
>
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