From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 551971A09A2 for ; Thu, 12 Mar 2015 00:08:22 +1100 (AEDT) Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 11 Mar 2015 23:08:21 +1000 Received: from d23relay08.au.ibm.com (d23relay08.au.ibm.com [9.185.71.33]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id D0FF62CE8040 for ; Thu, 12 Mar 2015 00:08:16 +1100 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay08.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t2BD88kt20774922 for ; Thu, 12 Mar 2015 00:08:16 +1100 Received: from d23av02.au.ibm.com (localhost [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t2BD7gHH011505 for ; Thu, 12 Mar 2015 00:07:43 +1100 From: Madhavan Srinivasan To: mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org Subject: [RFC PATCH 0/7] powerpc/powernv: Nest Instrumentation support Date: Wed, 11 Mar 2015 18:37:06 +0530 Message-Id: <1426079233-16720-1-git-send-email-maddy@linux.vnet.ibm.com> Cc: ak@linux.intel.com, srivatsa@mit.edu, linux-kernel@vger.kernel.org, eranian@google.com, linuxppc-dev@ozlabs.org, Madhavan Srinivasan , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patchset enables Nest Instrumentation support on powerpc. POWER8 has per-chip Nest Intrumentation which provides various per-chip utilisation metrics like memory bandwidth, IO bandwidth and many other component metrics. Nest Instrumentation provides an interface (via PORE Engine) to configure and move the nest counter data to memory. From kernel side, OPAL Call interface is used to activate/deactivate PORE Engine for nest data collection. OPAL at boot, detects the feature, initializes it and pass on the nest units and other related information such as memory region, events supported so on, to kernel via device-tree. Patchset uses Intel's uncore framework to enable the consumption of Nest instrumentation data on powerpc. First three patches are derived from arch/x86/kernel/cpu/perf_event_intel_uncore.[c/h]. But patches differ since "box" level abstration is not implemented As a TODO, need to rework the code to reduce code duplication. Fourth patch in the series adds the OPAL call interface to kernel. Fifth patch defines a generic pmu functions to be shared by all nest pmu units. And sixth patch defines the Device-tree parsing functions to populate various structures to aid the pmu registration. Patch also explains the device-tree layout for nest counter units. Here is sample perf usage to explain the interface and values represeneted here are bogus, since platform enablement is under-developement. # ./perf list .... uncore_mcs_0/mcs_read/ [Kernel PMU event] uncore_mcs_0/mcs_write/ [Kernel PMU event] uncore_mcs_1/mcs_read/ [Kernel PMU event] uncore_mcs_1/mcs_write/ [Kernel PMU event] uncore_mcs_2/mcs_read/ [Kernel PMU event] uncore_mcs_2/mcs_write/ [Kernel PMU event] uncore_mcs_3/mcs_read/ [Kernel PMU event] uncore_mcs_3/mcs_write/ [Kernel PMU event] ... [root@ltctul57a-p1 perf]# ./perf stat -e 'uncore_mcs_0/mcs_read/' -e 'uncore_mcs_0/mcs_write/' -a sleep 1 Performance counter stats for 'system wide': 64.00 MiB/s uncore_mcs_0/mcs_read/ [100.00%] 64.00 MiB/s uncore_mcs_0/mcs_write/ 1.000723515 seconds time elapsed Kindly let me know you comments and feedback. Madhavan Srinivasan (7): powerpc/powernv: Data structure and macros definition powerpc/powernv: uncore foundation code powerpc/powernv: uncore cpumask and CPU hotplug powerpc/powernv: Add OPAL support for uncore pmu powerpc/powernv: Add POWER8 uncore pmu support powerpc/powernv: add support to parse dt for uncore pmu powerpc/powernv: enable uncore related file in Makefile arch/powerpc/include/asm/opal.h | 3 + arch/powerpc/perf/Makefile | 2 +- arch/powerpc/perf/uncore_pmu.c | 260 ++++++++++++++++ arch/powerpc/perf/uncore_pmu.h | 89 ++++++ arch/powerpc/perf/uncore_pmu_p8.c | 403 +++++++++++++++++++++++++ arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + 6 files changed, 757 insertions(+), 1 deletion(-) create mode 100644 arch/powerpc/perf/uncore_pmu.c create mode 100644 arch/powerpc/perf/uncore_pmu.h create mode 100644 arch/powerpc/perf/uncore_pmu_p8.c -- 1.9.1