From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Cc: mikey@neuling.org, ak@linux.intel.com, peterz@infradead.org,
eranian@google.com, mingo@kernel.org
Subject: [PATCH 4/5] x86, perf: Add conditional branch filtering support
Date: Wed, 22 May 2013 11:52:40 +0530 [thread overview]
Message-ID: <1369203761-12649-5-git-send-email-khandual@linux.vnet.ibm.com> (raw)
In-Reply-To: <1369203761-12649-1-git-send-email-khandual@linux.vnet.ibm.com>
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
This patch adds conditional branch filtering support,
enabling it for PERF_SAMPLE_BRANCH_COND in perf branch
stack sampling framework by utilizing an available
software filter X86_BR_JCC.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index d978353..a0d6387 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -337,6 +337,10 @@ static int intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
if (br_type & PERF_SAMPLE_BRANCH_IND_CALL)
mask |= X86_BR_IND_CALL;
+
+ if (br_type & PERF_SAMPLE_BRANCH_COND)
+ mask |= X86_BR_JCC;
+
/*
* stash actual user request into reg, it may
* be used by fixup code for some CPU
@@ -626,6 +630,7 @@ static const int nhm_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX] = {
* NHM/WSM erratum: must include IND_JMP to capture IND_CALL
*/
[PERF_SAMPLE_BRANCH_IND_CALL] = LBR_IND_CALL | LBR_IND_JMP,
+ [PERF_SAMPLE_BRANCH_COND] = LBR_JCC,
};
static const int snb_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX] = {
@@ -637,6 +642,7 @@ static const int snb_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX] = {
[PERF_SAMPLE_BRANCH_ANY_CALL] = LBR_REL_CALL | LBR_IND_CALL
| LBR_FAR,
[PERF_SAMPLE_BRANCH_IND_CALL] = LBR_IND_CALL,
+ [PERF_SAMPLE_BRANCH_COND] = LBR_JCC,
};
/* core */
--
1.7.11.7
next prev parent reply other threads:[~2013-05-22 6:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-22 6:22 [PATCH 0/5] perf: Introducing new conditional branch filter Anshuman Khandual
2013-05-22 6:22 ` [PATCH 1/5] perf: New conditional branch filter criteria in branch stack sampling Anshuman Khandual
2013-05-23 13:36 ` Stephane Eranian
2013-05-22 6:22 ` [PATCH 2/5] powerpc, perf: Enable conditional branch filter for POWER8 Anshuman Khandual
2013-05-22 7:53 ` Peter Zijlstra
2013-05-22 10:20 ` Michael Neuling
2013-05-22 6:22 ` [PATCH 3/5] perf, tool: Conditional branch filter 'cond' added to perf record Anshuman Khandual
2013-05-22 6:22 ` Anshuman Khandual [this message]
2013-05-23 13:38 ` [PATCH 4/5] x86, perf: Add conditional branch filtering support Stephane Eranian
2013-05-22 6:22 ` [PATCH 5/5] perf, documentation: Description for conditional branch filter Anshuman Khandual
2013-05-23 13:39 ` Stephane Eranian
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1369203761-12649-5-git-send-email-khandual@linux.vnet.ibm.com \
--to=khandual@linux.vnet.ibm.com \
--cc=ak@linux.intel.com \
--cc=eranian@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=mikey@neuling.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).