Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752372Ab3FYIuA (ORCPT ); Tue, 25 Jun 2013 04:50:00 -0400 Received: from mga02.intel.com ([134.134.136.20]:47567 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752837Ab3FYIrb (ORCPT ); Tue, 25 Jun 2013 04:47:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,935,1363158000"; d="scan'208";a="359143508" From: "Yan, Zheng" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, a.p.zijlstra@chello.nl, eranian@google.com, andi@firstfloor.org, "Yan, Zheng" Subject: [PATCH 5/7] perf, core: Pass perf_sample_data to perf_callchain() Date: Tue, 25 Jun 2013 16:47:17 +0800 Message-Id: <1372150039-15151-6-git-send-email-zheng.z.yan@intel.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1372150039-15151-1-git-send-email-zheng.z.yan@intel.com> References: <1372150039-15151-1-git-send-email-zheng.z.yan@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5878 Lines: 160 From: "Yan, Zheng" New Intel CPU can record call chains by using existing last branch record facility. perf_callchain_user() can make use of the call chains recorded by hardware in case of there is no frame pointer. Signed-off-by: Yan, Zheng --- arch/arm/kernel/perf_event.c | 4 ++-- arch/powerpc/perf/callchain.c | 4 ++-- arch/sparc/kernel/perf_event.c | 4 ++-- arch/x86/kernel/cpu/perf_event.c | 4 ++-- include/linux/perf_event.h | 3 ++- kernel/events/callchain.c | 8 +++++--- kernel/events/core.c | 2 +- kernel/events/internal.h | 3 ++- 8 files changed, 18 insertions(+), 14 deletions(-) diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 8c3094d..3f84d3c 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -559,8 +559,8 @@ user_backtrace(struct frame_tail __user *tail, return buftail.fp - 1; } -void -perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) +void perf_callchain_user(struct perf_callchain_entry *entry, + struct pt_regs *regs, struct perf_sample_data *data) { struct frame_tail __user *tail; diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c index 74d1e78..b379ebc 100644 --- a/arch/powerpc/perf/callchain.c +++ b/arch/powerpc/perf/callchain.c @@ -482,8 +482,8 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry, } } -void -perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) +void perf_callchain_user(struct perf_callchain_entry *entry, + struct pt_regs *regs, struct perf_sample_data *data) { if (current_is_64bit()) perf_callchain_user_64(entry, regs); diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c index b5c38fa..cba0306 100644 --- a/arch/sparc/kernel/perf_event.c +++ b/arch/sparc/kernel/perf_event.c @@ -1785,8 +1785,8 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry, } while (entry->nr < PERF_MAX_STACK_DEPTH); } -void -perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) +void perf_callchain_user(struct perf_callchain_entry *entry, + struct pt_regs *regs, struct perf_sample_data *data) { perf_callchain_store(entry, regs->tpc); diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 3843f80..639aa4d 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1999,8 +1999,8 @@ perf_callchain_user32(struct pt_regs *regs, struct perf_callchain_entry *entry) } #endif -void -perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) +void perf_callchain_user(struct perf_callchain_entry *entry, + struct pt_regs *regs, struct perf_sample_data *data) { struct stack_frame frame; const void __user *fp; diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index b3e4faf..fa4c1bf 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -701,7 +701,8 @@ extern void perf_event_fork(struct task_struct *tsk); /* Callchains */ DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); -extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs); +extern void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs, + struct perf_sample_data *data); extern void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs); static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index c772061..bd7138a 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -30,7 +30,8 @@ __weak void perf_callchain_kernel(struct perf_callchain_entry *entry, } __weak void perf_callchain_user(struct perf_callchain_entry *entry, - struct pt_regs *regs) + struct pt_regs *regs, + struct perf_sample_data *data) { } @@ -154,7 +155,8 @@ put_callchain_entry(int rctx) } struct perf_callchain_entry * -perf_callchain(struct perf_event *event, struct pt_regs *regs) +perf_callchain(struct perf_event *event, struct pt_regs *regs, + struct perf_sample_data *data) { int rctx; struct perf_callchain_entry *entry; @@ -195,7 +197,7 @@ perf_callchain(struct perf_event *event, struct pt_regs *regs) goto exit_put; perf_callchain_store(entry, PERF_CONTEXT_USER); - perf_callchain_user(entry, regs); + perf_callchain_user(entry, regs, data); } } diff --git a/kernel/events/core.c b/kernel/events/core.c index 1101ce8..4aad901 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4545,7 +4545,7 @@ void perf_prepare_sample(struct perf_event_header *header, if (sample_type & PERF_SAMPLE_CALLCHAIN) { int size = 1; - data->callchain = perf_callchain(event, regs); + data->callchain = perf_callchain(event, regs, data); if (data->callchain) size += data->callchain->nr; diff --git a/kernel/events/internal.h b/kernel/events/internal.h index ca65997..0e939e6 100644 --- a/kernel/events/internal.h +++ b/kernel/events/internal.h @@ -130,7 +130,8 @@ DEFINE_OUTPUT_COPY(__output_copy_user, arch_perf_out_copy_user) /* Callchain handling */ extern struct perf_callchain_entry * -perf_callchain(struct perf_event *event, struct pt_regs *regs); +perf_callchain(struct perf_event *event, struct pt_regs *regs, + struct perf_sample_data *data); extern int get_callchain_buffers(void); extern void put_callchain_buffers(void); -- 1.8.1.4 -- 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/