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perf/x86/intel/uncore: Cache logical pkg id in uncore driver 

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. This allows to change the logical package
management without affecting the performance critical path.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: He Chen <he.chen@linux.intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Piotr Luc <piotr.luc@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Link: https://lkml.kernel.org/r/20171114124257.22013-2-prarit@redhat.com
This commit is contained in:
Andi Kleen 2017-11-14 07:42:55 -05:00 committed by Thomas Gleixner
parent 4ee2ec1b12
commit d46b4c1ce5
3 changed files with 4 additions and 4 deletions
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4
arch/x86/events/intel/uncore.c
View File

@ -975,10 +975,10 @@ static void uncore_pci_remove(struct pci_dev *pdev)
int i, phys_id, pkg;
phys_id = uncore_pcibus_to_physid(pdev->bus);
pkg = topology_phys_to_logical_pkg(phys_id);
box = pci_get_drvdata(pdev);
if (!box) {
pkg = topology_phys_to_logical_pkg(phys_id);
for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
if (uncore_extra_pci_dev[pkg].dev[i] == pdev) {
uncore_extra_pci_dev[pkg].dev[i] = NULL;
@ -994,7 +994,7 @@ static void uncore_pci_remove(struct pci_dev *pdev)
return;
pci_set_drvdata(pdev, NULL);
pmu->boxes[pkg] = NULL;
pmu->boxes[box->pkgid] = NULL;
if (atomic_dec_return(&pmu->activeboxes) == 0)
uncore_pmu_unregister(pmu);
uncore_box_exit(box);

2
arch/x86/events/intel/uncore.h
View File

@ -100,7 +100,7 @@ struct intel_uncore_extra_reg {
struct intel_uncore_box {
int pci_phys_id;
int pkgid;
int pkgid; /* Logical package ID */
int n_active; /* number of active events */
int n_events;
int cpu; /* cpu to collect events */

2
arch/x86/events/intel/uncore_snbep.c
View File

@ -1057,7 +1057,7 @@ 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->pkgid;
struct pci_dev *filter_pdev = uncore_extra_pci_dev[pkg].dev[idx];
if (filter_pdev) {