perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem'

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 mostly dummy files with small
wrappers, so that we are able to include memcpy_64.S
unmodified.

Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: h.mitake@gmail.com
Cc: Miao Xie <miaox@cn.fujitsu.com>
Cc: Ma Ling <ling.ma@intel.com>
Cc: Zhao Yakui <yakui.zhao@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <1290668693-27068-2-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Hitoshi Mitake 2010-11-25 16:04:53 +09:00 committed by Ingo Molnar
parent 49ce8fc651
commit ea7872b9d6
7 changed files with 62 additions and 0 deletions

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@ -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 += $(OUTPUT)builtin-diff.o
@ -898,6 +908,7 @@ BASIC_CFLAGS += -DSHA1_HEADER='$(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

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@ -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

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@ -0,0 +1,4 @@
MEMCPY_FN(__memcpy,
"x86-64-unrolled",
"unrolled memcpy() in arch/x86/lib/memcpy_64.S")

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@ -0,0 +1,2 @@
#include "../../../arch/x86/lib/memcpy_64.S"

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@ -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 */

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@ -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 */

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@ -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_ */