Messages in this thread | | | Subject | Re: [PATCH v2] drivers/perf: hisi: Schedule perf session according to locality | From | Yicong Yang <> | Date | Tue, 15 Aug 2023 21:14:41 +0800 |
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Hi,
Please ignore this due to the wrong format of the changelog. Has resend. Sorry for the noise.
On 2023/8/15 21:06, Yicong Yang wrote: > From: Yicong Yang <yangyicong@hisilicon.com> > > The PCIe PMUs locate on different NUMA node but currently we don't > consider it and likely stack all the sessions on the same CPU: > > [root@localhost tmp]# cat /sys/devices/hisi_pcie*/cpumask > 0 > 0 > 0 > 0 > 0 > 0 > > This can be optimize a bit to use a local CPU for the PMU. > > Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> > Change since v2: > - Make interrupt affinity consistent with CPU in online handler > Link: https://lore.kernel.org/all/20230808125147.2080-1-yangyicong@huawei.com/ > > --- > drivers/perf/hisilicon/hisi_pcie_pmu.c | 17 +++++++++++++---- > 1 file changed, 13 insertions(+), 4 deletions(-) > > diff --git a/drivers/perf/hisilicon/hisi_pcie_pmu.c b/drivers/perf/hisilicon/hisi_pcie_pmu.c > index e10fc7cb9493..5a00adb2de8c 100644 > --- a/drivers/perf/hisilicon/hisi_pcie_pmu.c > +++ b/drivers/perf/hisilicon/hisi_pcie_pmu.c > @@ -665,8 +665,8 @@ static int hisi_pcie_pmu_online_cpu(unsigned int cpu, struct hlist_node *node) > struct hisi_pcie_pmu *pcie_pmu = hlist_entry_safe(node, struct hisi_pcie_pmu, node); > > if (pcie_pmu->on_cpu == -1) { > - pcie_pmu->on_cpu = cpu; > - WARN_ON(irq_set_affinity(pcie_pmu->irq, cpumask_of(cpu))); > + pcie_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(&pcie_pmu->pdev->dev)); > + WARN_ON(irq_set_affinity(pcie_pmu->irq, cpumask_of(pcie_pmu->on_cpu))); > } > > return 0; > @@ -676,14 +676,23 @@ static int hisi_pcie_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) > { > struct hisi_pcie_pmu *pcie_pmu = hlist_entry_safe(node, struct hisi_pcie_pmu, node); > unsigned int target; > + cpumask_t mask; > + int numa_node; > > /* Nothing to do if this CPU doesn't own the PMU */ > if (pcie_pmu->on_cpu != cpu) > return 0; > > pcie_pmu->on_cpu = -1; > - /* Choose a new CPU from all online cpus. */ > - target = cpumask_any_but(cpu_online_mask, cpu); > + > + /* Choose a local CPU from all online cpus. */ > + numa_node = dev_to_node(&pcie_pmu->pdev->dev); > + if (cpumask_and(&mask, cpumask_of_node(numa_node), cpu_online_mask) && > + cpumask_andnot(&mask, &mask, cpumask_of(cpu))) > + target = cpumask_any(&mask); > + else > + target = cpumask_any_but(cpu_online_mask, cpu); > + > if (target >= nr_cpu_ids) { > pci_err(pcie_pmu->pdev, "There is no CPU to set\n"); > return 0; >
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