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Date: Thu, 25 Nov 2010 16:04:53 +0900
From: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To: Ingo Molnar <mingo@...e.hu>
Cc: linux-kernel@...r.kernel.org, mitake@....info.waseda.ac.jp,
h.mitake@...il.com, Miao Xie <miaox@...fujitsu.com>,
Ma Ling <ling.ma@...el.com>, Zhao Yakui <yakui.zhao@...el.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Paul Mackerras <paulus@...ba.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>
Subject: [PATCH v2 2/2] perf bench: port arch/x86/lib/memcpy_64.S to perf bench mem memcpy
This patch ports arch/x86/lib/memcpy_64.S to perf bench mem memcpy
for benchmarking memcpy() in userland with tricky and dirty way.
util/include/asm/cpufeature.h, util/include/asm/dwarf2.h, and
util/include/linux/linkage.h are dummy (but do a little work) for
including memcpy_64.S without modification to it (e.g. defining ENTRY()).
This makes checkpatch.pl angry like this:
\#177: FILE: tools/perf/util/include/linux/linkage.h:7:
+#define ENTRY(name) \
+ .globl name; \
+ name:
WARNING: labels should not be indented
\#179: FILE: tools/perf/util/include/linux/linkage.h:9:
+ name:
because checkpatch.pl treat this file as the file written in C.
But I think this can be forgived because original include/linux/linkage.h
is doing the similar thing.
Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Miao Xie <miaox@...fujitsu.com>
Cc: Ma Ling <ling.ma@...el.com>
Cc: Zhao Yakui <yakui.zhao@...el.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Andi Kleen <andi@...stfloor.org>
---
tools/perf/Makefile | 11 +++++++++++
tools/perf/bench/mem-memcpy-arch.h | 12 ++++++++++++
tools/perf/bench/mem-memcpy-x86-64-asm-def.h | 4 ++++
tools/perf/bench/mem-memcpy-x86-64-asm.S | 2 ++
tools/perf/util/include/asm/cpufeature.h | 9 +++++++++
tools/perf/util/include/asm/dwarf2.h | 11 +++++++++++
tools/perf/util/include/linux/linkage.h | 13 +++++++++++++
7 files changed, 62 insertions(+), 0 deletions(-)
create mode 100644 tools/perf/bench/mem-memcpy-arch.h
create mode 100644 tools/perf/bench/mem-memcpy-x86-64-asm-def.h
create mode 100644 tools/perf/bench/mem-memcpy-x86-64-asm.S
create mode 100644 tools/perf/util/include/asm/cpufeature.h
create mode 100644 tools/perf/util/include/asm/dwarf2.h
create mode 100644 tools/perf/util/include/linux/linkage.h
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 2d414b3..b3e6bc6 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -185,7 +185,10 @@ ifeq ($(ARCH),i386)
ARCH := x86
endif
ifeq ($(ARCH),x86_64)
+ RAW_ARCH := x86_64
ARCH := x86
+ ARCH_CFLAGS := -DARCH_X86_64
+ ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S
endif
# CFLAGS and LDFLAGS are for the users to override from the command line.
@@ -375,6 +378,7 @@ LIB_H += util/include/linux/prefetch.h
LIB_H += util/include/linux/rbtree.h
LIB_H += util/include/linux/string.h
LIB_H += util/include/linux/types.h
+LIB_H += util/include/linux/linkage.h
LIB_H += util/include/asm/asm-offsets.h
LIB_H += util/include/asm/bug.h
LIB_H += util/include/asm/byteorder.h
@@ -383,6 +387,8 @@ LIB_H += util/include/asm/swab.h
LIB_H += util/include/asm/system.h
LIB_H += util/include/asm/uaccess.h
LIB_H += util/include/dwarf-regs.h
+LIB_H += util/include/asm/dwarf2.h
+LIB_H += util/include/asm/cpufeature.h
LIB_H += perf.h
LIB_H += util/cache.h
LIB_H += util/callchain.h
@@ -417,6 +423,7 @@ LIB_H += util/probe-finder.h
LIB_H += util/probe-event.h
LIB_H += util/pstack.h
LIB_H += util/cpumap.h
+LIB_H += $(ARCH_INCLUDE)
LIB_OBJS += $(OUTPUT)util/abspath.o
LIB_OBJS += $(OUTPUT)util/alias.o
@@ -472,6 +479,9 @@ BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
# Benchmark modules
BUILTIN_OBJS += $(OUTPUT)bench/sched-messaging.o
BUILTIN_OBJS += $(OUTPUT)bench/sched-pipe.o
+ifeq ($(RAW_ARCH),x86_64)
+BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy-x86-64-asm.o
+endif
BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o
BUILTIN_OBJS += $(OUTPUT)builtin-diff.o
@@ -909,6 +919,7 @@ BASIC_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' \
LIB_OBJS += $(COMPAT_OBJS)
ALL_CFLAGS += $(BASIC_CFLAGS)
+ALL_CFLAGS += $(ARCH_CFLAGS)
ALL_LDFLAGS += $(BASIC_LDFLAGS)
export TAR INSTALL DESTDIR SHELL_PATH
diff --git a/tools/perf/bench/mem-memcpy-arch.h b/tools/perf/bench/mem-memcpy-arch.h
new file mode 100644
index 0000000..a72e36c
--- /dev/null
+++ b/tools/perf/bench/mem-memcpy-arch.h
@@ -0,0 +1,12 @@
+
+#ifdef ARCH_X86_64
+
+#define MEMCPY_FN(fn, name, desc) \
+ extern void *fn(void *, const void *, size_t);
+
+#include "mem-memcpy-x86-64-asm-def.h"
+
+#undef MEMCPY_FN
+
+#endif
+
diff --git a/tools/perf/bench/mem-memcpy-x86-64-asm-def.h b/tools/perf/bench/mem-memcpy-x86-64-asm-def.h
new file mode 100644
index 0000000..d588b87
--- /dev/null
+++ b/tools/perf/bench/mem-memcpy-x86-64-asm-def.h
@@ -0,0 +1,4 @@
+
+MEMCPY_FN(__memcpy,
+ "x86-64-unrolled",
+ "unrolled memcpy() in arch/x86/lib/memcpy_64.S")
diff --git a/tools/perf/bench/mem-memcpy-x86-64-asm.S b/tools/perf/bench/mem-memcpy-x86-64-asm.S
new file mode 100644
index 0000000..a57b66e
--- /dev/null
+++ b/tools/perf/bench/mem-memcpy-x86-64-asm.S
@@ -0,0 +1,2 @@
+
+#include "../../../arch/x86/lib/memcpy_64.S"
diff --git a/tools/perf/util/include/asm/cpufeature.h b/tools/perf/util/include/asm/cpufeature.h
new file mode 100644
index 0000000..acffd5e
--- /dev/null
+++ b/tools/perf/util/include/asm/cpufeature.h
@@ -0,0 +1,9 @@
+
+#ifndef PERF_CPUFEATURE_H
+#define PERF_CPUFEATURE_H
+
+/* cpufeature.h ... dummy header file for including arch/x86/lib/memcpy_64.S */
+
+#define X86_FEATURE_REP_GOOD 0
+
+#endif /* PERF_CPUFEATURE_H */
diff --git a/tools/perf/util/include/asm/dwarf2.h b/tools/perf/util/include/asm/dwarf2.h
new file mode 100644
index 0000000..bb4198e
--- /dev/null
+++ b/tools/perf/util/include/asm/dwarf2.h
@@ -0,0 +1,11 @@
+
+#ifndef PERF_DWARF2_H
+#define PERF_DWARF2_H
+
+/* dwarf2.h ... dummy header file for including arch/x86/lib/memcpy_64.S */
+
+#define CFI_STARTPROC
+#define CFI_ENDPROC
+
+#endif /* PERF_DWARF2_H */
+
diff --git a/tools/perf/util/include/linux/linkage.h b/tools/perf/util/include/linux/linkage.h
new file mode 100644
index 0000000..06387cf
--- /dev/null
+++ b/tools/perf/util/include/linux/linkage.h
@@ -0,0 +1,13 @@
+
+#ifndef PERF_LINUX_LINKAGE_H_
+#define PERF_LINUX_LINKAGE_H_
+
+/* linkage.h ... for including arch/x86/lib/memcpy_64.S */
+
+#define ENTRY(name) \
+ .globl name; \
+ name:
+
+#define ENDPROC(name)
+
+#endif /* PERF_LINUX_LINKAGE_H_ */
--
1.6.5.2
--
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