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Commit ea7872b9 authored by Hitoshi Mitake's avatar Hitoshi Mitake Committed by Ingo Molnar
Browse files

perf bench: Add feature that measures the performance of the... 


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: default avatarHitoshi 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: default avatarIngo Molnar <mingo@elte.hu>
parent 49ce8fc6

tools/perf/Makefile

+11 −0
Original line number Diff line number Diff line
@@ -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

tools/perf/bench/mem-memcpy-arch.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 


#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

tools/perf/bench/mem-memcpy-x86-64-asm-def.h

0 → 100644
+4 −0
Original line number Diff line number Diff line 


MEMCPY_FN(__memcpy,

	"x86-64-unrolled",

	"unrolled memcpy() in arch/x86/lib/memcpy_64.S")

tools/perf/bench/mem-memcpy-x86-64-asm.S

0 → 100644
+2 −0
Original line number Diff line number Diff line 


#include "../../../arch/x86/lib/memcpy_64.S"

tools/perf/util/include/asm/cpufeature.h

0 → 100644
+9 −0
Original line number Diff line number Diff line 


#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 */