diff options
| author | Yicong Yang <yangyicong@hisilicon.com> | 2023-08-15 16:10:10 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2023-08-16 16:27:43 +0300 |
| commit | 83a6d80c2bfd1d348e5e7079af21a924fdc5c972 (patch) | |
| tree | 254484f72ee628f591e20aad51a11566e1f9d690 /drivers/perf | |
| parent | 4c1d2f56d685406fc6b452ca5f797bda62a06609 (diff) | |
| download | linux-83a6d80c2bfd1d348e5e7079af21a924fdc5c972.tar.xz | |
drivers/perf: hisi: Schedule perf session according to locality
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>
Link: https://lore.kernel.org/r/20230815131010.2147-1-yangyicong@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/hisilicon/hisi_pcie_pmu.c | 17 |
1 files 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; |