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Date: Mon, 29 Nov 2010 22:26:47 +0900 From: Hitoshi Mitake <mitake@....info.waseda.ac.jp> To: mingo@...hat.com, hpa@...or.com, acme@...hat.com, paulus@...ba.org, linux-kernel@...r.kernel.org, andi@...stfloor.org, a.p.zijlstra@...llo.nl, yakui.zhao@...el.com, mitake@....info.waseda.ac.jp, fweisbec@...il.com, ling.ma@...el.com, rostedt@...dmis.org, miaox@...fujitsu.com, tglx@...utronix.de, mingo@...e.hu CC: linux-tip-commits@...r.kernel.org Subject: Re: [tip:perf/core] perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem' On 2010年11月26日 19:31, tip-bot for Hitoshi Mitake wrote: > Commit-ID: ea7872b9d6a81101f6ba0ec141544a62fea35876 > Gitweb: http://git.kernel.org/tip/ea7872b9d6a81101f6ba0ec141544a62fea35876 > Author: Hitoshi Mitake<mitake@....info.waseda.ac.jp> > AuthorDate: Thu, 25 Nov 2010 16:04:53 +0900 > Committer: Ingo Molnar<mingo@...e.hu> > CommitDate: Fri, 26 Nov 2010 08:15:57 +0100 > > 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@....info.waseda.ac.jp> > Cc: h.mitake@...il.com > 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: Andi Kleen<andi@...stfloor.org> > LKML-Reference:<1290668693-27068-2-git-send-email-mitake@....info.waseda.ac.jp> > Signed-off-by: Ingo Molnar<mingo@...e.hu> > --- > 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(-) > > diff --git a/tools/perf/Makefile b/tools/perf/Makefile > index 74b684d..e0db197 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 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_ */ > Thanks for your applying, Ingo! BTW, I have a question. Why does the symbol name of rep prefix memcpy() start from '.'? The symbol name starts from '.' like ".Lmemcpy_c" cannot seen as symbol name after compile. I couldn't find the reason why .Lmemcpy_c has to start from '.'. For example, clear_page in arch/x86/lib/clear_page_64.S doesn't start from '.' but it is alternative function. If there is no special reason, I'd like to rename it. Thanks, Hitoshi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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