Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755541Ab1EKQE7 (ORCPT ); Wed, 11 May 2011 12:04:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30396 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755927Ab1EKPzv (ORCPT ); Wed, 11 May 2011 11:55:51 -0400 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH v1 0/5] KVM in-guest performance monitoring Date: Wed, 11 May 2011 11:55:28 -0400 Message-Id: <1305129333-7456-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2765 Lines: 59 This not-for-merging patchset exposes an emulated version 1 architectural performance monitoring unit to KVM guests. The PMU is emulated using perf_events, so the host kernel can multiplex host-wide, host-user, and the guest on available resources. Caveats: - counters that have PMI (interrupt) enabled stop counting after the interrupt is signalled. This is because we need one-shot samples that keep counting, which perf doesn't support yet - some combinations of INV and CMASK are not supported - counters keep on counting in the host as well as the guest - the RDPMC instruction and CR4.PCE bit are not yet emulated - there is likely a bug in the implementation; running 'perf top' in a guest that spends 80% of its time in userspace shows perf itself as consuming almost all cpu perf maintainers: please consider the first three patches for merging (the first two make sense even without the rest). If you're familiar with the Intel PMU, please review patch 5 as well - it effectively undoes all your work of abstracting the PMU into perf_events by unabstracting perf_events into what is hoped is a very similar PMU. Avi Kivity (5): perf: add context parameter to perf_event overflow handler x86, perf: add constraints for architectural PMU v1 perf: export perf_event_refresh() to modules KVM: Expose kvm_lapic_local_deliver() KVM: Expose a version 1 architectural PMU to guests arch/arm/kernel/ptrace.c | 10 +- arch/powerpc/kernel/ptrace.c | 4 +- arch/sh/kernel/ptrace_32.c | 5 +- arch/x86/include/asm/kvm_host.h | 29 ++++ arch/x86/kernel/cpu/perf_event_intel.c | 23 +++- arch/x86/kernel/kgdb.c | 2 +- arch/x86/kernel/ptrace.c | 5 +- arch/x86/kvm/Makefile | 2 +- arch/x86/kvm/lapic.c | 2 +- arch/x86/kvm/lapic.h | 1 + arch/x86/kvm/pmu.c | 248 +++++++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 16 +- drivers/oprofile/oprofile_perf.c | 5 +- include/linux/hw_breakpoint.h | 10 +- include/linux/perf_event.h | 13 ++- kernel/events/core.c | 27 +++- kernel/events/hw_breakpoint.c | 10 +- kernel/watchdog.c | 7 +- samples/hw_breakpoint/data_breakpoint.c | 5 +- 19 files changed, 377 insertions(+), 47 deletions(-) create mode 100644 arch/x86/kvm/pmu.c -- 1.7.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/