[PATCH 1/3] perf/x86/intel/uncore: Cache logical pkg id in uncore driver

From: Prarit Bhargava <prarit@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Andi Kleen <ak@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
	Dave Hansen <dave.hansen@intel.com>,
	Piotr Luc <piotr.luc@intel.com>, Kan Liang <kan.liang@intel.com>,
	Borislav Petkov <bp@suse.de>,
	Stephane Eranian <eranian@google.com>,
	Prarit Bhargava <prarit@redhat.com>,
	Arvind Yadav <arvind.yadav.cs@gmail.com>,
	Andy Lutomirski <luto@kernel.org>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Mathias Krause <minipli@googlemail.com>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>
Subject: [PATCH 1/3] perf/x86/intel/uncore: Cache logical pkg id in uncore driver
Date: Tue, 24 Oct 2017 14:08:00 -0400	[thread overview]
Message-ID: <20171024180802.8422-2-prarit@redhat.com> (raw)
In-Reply-To: <20171024180802.8422-1-prarit@redhat.com>

From: Andi Kleen <ak@linux.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@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Piotr Luc <piotr.luc@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Stephane Eranian <eranian@google.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.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 d45e06346f14..87ef77982248 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -947,6 +947,7 @@ 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 a7196818416a..252d371b488b 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) {
-- 
2.15.0.rc0.39.g2f0e14e64
