linux-kernel - [PATCH 4/4] Add trace decoding script to add MSR names to MSR trace

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Date:	Fri, 10 Oct 2014 14:47:53 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, rostedt@...dmis.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 4/4] Add trace decoding script to add MSR names to MSR trace

From: Andi Kleen <ak@...ux.intel.com>

Add the MSR names from msr-index.h to a trace including read/write_msr
events.  This makes the output much easier to read.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 Documentation/trace/postprocess/decode_msr.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100755 Documentation/trace/postprocess/decode_msr.py

diff --git a/Documentation/trace/postprocess/decode_msr.py b/Documentation/trace/postprocess/decode_msr.py
new file mode 100755
index 0000000..e3aa832
--- /dev/null
+++ b/Documentation/trace/postprocess/decode_msr.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+# add symbolic names to read_msr / write_msr events in trace
+# decode_msr $kernel/arch/x86/include/uapi/asm/msr-index.h < trace
+
+import sys
+import re
+
+msrs = dict()
+
+with open(sys.argv[1], "r") as f:
+	for j in f:
+		m = re.match(r'#define (MSR_\w+)\s+(0x[0-9a-fA-F]+)', j)
+		if m:
+			msrs[int(m.group(2), 16)] = m.group(1)
+
+for j in sys.stdin:
+	m = re.search(r'(read|write)_msr: ([0-9a-f]+)', j)
+	if m and int(m.group(2), 16) in msrs:
+		j = j.replace(" " + m.group(2), " " + msrs[int(m.group(2), 16)])
+	print j,
+
+
-- 
1.9.3

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