From ea7872b9d6a81101f6ba0ec141544a62fea35876 Mon Sep 17 00:00:00 2001 From: Hitoshi Mitake Date: Thu, 25 Nov 2010 16:04:53 +0900 Subject: [PATCH] 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 Cc: h.mitake@gmail.com Cc: Miao Xie Cc: Ma Ling Cc: Zhao Yakui Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: Frederic Weisbecker Cc: Steven Rostedt Cc: Andi Kleen LKML-Reference: <1290668693-27068-2-git-send-email-mitake@dcl.info.waseda.ac.jp> Signed-off-by: Ingo Molnar --- 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(+) 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 74b684da8f13..e0db1978c858 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 += $(OUTPUT)builtin-diff.o @@ -898,6 +908,7 @@ BASIC_CFLAGS += -DSHA1_HEADER='$(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 diff --git a/tools/perf/bench/mem-memcpy-arch.h b/tools/perf/bench/mem-memcpy-arch.h new file mode 100644 index 000000000000..a72e36cb5394 --- /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 000000000000..d588b87696fc --- /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 000000000000..a57b66e853c2 --- /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 000000000000..acffd5e4d1d4 --- /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 000000000000..bb4198e7837a --- /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 000000000000..06387cffe125 --- /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_ */