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Message-Id: <1505420820-7274-2-git-send-email-prarit@redhat.com> Date: Thu, 14 Sep 2017 16:26:58 -0400 From: Prarit Bhargava <prarit@...hat.com> To: linux-kernel@...r.kernel.org Cc: kan.liang@...el.com, x86@...nel.org, andi@...stfloor.org, peterz@...radead.org, Andi Kleen <ak@...ux.intel.com> Subject: [PATCH 1/3 v2] perf/x86/intel/uncore: Cache logical pkg id in uncore driver From: Andi Kleen <ak@...ux.intel.com> The SNB-EP uncore driver is the only user of topology_phys_to_logical_pkg in a performance critical path. Change it query the logical pkg ID only once at initialization time and then cache it in box structure. Signed-off-by: Andi Kleen <ak@...ux.intel.com> --- arch/x86/events/intel/uncore.c | 1 + arch/x86/events/intel/uncore.h | 1 + arch/x86/events/intel/uncore_snbep.c | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 1c5390f1cf09..d13ac98e922b 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -939,6 +939,7 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id atomic_inc(&box->refcnt); box->pci_phys_id = phys_id; + box->logical_pkg_id = topology_phys_to_logical_pkg(box->pci_phys_id); box->pkgid = pkg; box->pci_dev = pdev; box->pmu = pmu; diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h index df5989f27b1b..6214cd33a9fb 100644 --- a/arch/x86/events/intel/uncore.h +++ b/arch/x86/events/intel/uncore.h @@ -99,6 +99,7 @@ struct intel_uncore_extra_reg { struct intel_uncore_box { int pci_phys_id; + int logical_pkg_id; int pkgid; int n_active; /* number of active events */ int n_events; diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index db1fe377e6dd..11dec9f94cb0 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -1056,7 +1056,7 @@ static void snbep_qpi_enable_event(struct intel_uncore_box *box, struct perf_eve if (reg1->idx != EXTRA_REG_NONE) { int idx = box->pmu->pmu_idx + SNBEP_PCI_QPI_PORT0_FILTER; - int pkg = topology_phys_to_logical_pkg(box->pci_phys_id); + int pkg = box->logical_pkg_id; struct pci_dev *filter_pdev = uncore_extra_pci_dev[pkg].dev[idx]; if (filter_pdev) { -- 1.8.5.5
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