From 45677454dd6d128608117abe7dcd2bdfdd7cdf72 Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Thu, 28 Oct 2010 00:24:34 +0800 Subject: ftrace: Speed up recordmcount cmd_record_mcount is used to locate the _mcount symbols in the object files, only the files compiled with -pg has the _mcount symbol, so, it is only needed for such files, but the current cmd_record_mcount is used for all of the object files, so, we need to fix it and speed it up. Since -pg may be removed by the method used in kernel/trace/Makefile: ORIG_CFLAGS := $(KBUILD_CFLAGS) KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS)) Or may be removed by the method used in arch/x86/kernel/Makefile: CFLAGS_REMOVE_file.o = -pg So, we must check the last variable stores the compiling flags, that is c_flags(Please refer to cmd_cc_o_c and rule_cc_o_c defined in scripts/Makefile.build) and since the CFLAGS_REMOVE_file.o is already filtered in _c_flags(Please refer to scripts/Makefile.lib) and _c_flags has less symbols, therefore, we only need to check _c_flags. --------------- Changes from v1: o Don't touch Makefile for CONFIG_FTRACE_MCOUNT_RECORD is enough o Use _c_flags intead of KBUILD_CFLAGS to cover CONFIG_REMOVE_file.o = -pg (feedback from Steven Rostedt ) Acked-by: Michal Marek Signed-off-by: Wu Zhangjin LKML-Reference: <3dc8cddf022eb7024f9f2cf857529a15bee8999a.1288196498.git.wuzhangjin@gmail.com> [ changed if [ .. == .. ] to if [ .. = .. ] to handle dash environments ] Signed-off-by: Steven Rostedt --- scripts/Makefile.build | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'scripts') diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 5ad25e17b6cb..4eb99ab34053 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -214,17 +214,22 @@ ifdef BUILD_C_RECORDMCOUNT # The empty.o file is created in the make process in order to determine # the target endianness and word size. It is made before all other C # files, including recordmcount. -cmd_record_mcount = if [ $(@) != "scripts/mod/empty.o" ]; then \ - $(objtree)/scripts/recordmcount "$(@)"; \ - fi; +sub_cmd_record_mcount = \ + if [ $(@) != "scripts/mod/empty.o" ]; then \ + $(objtree)/scripts/recordmcount "$(@)"; \ + fi; else -cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ +sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ "$(if $(CONFIG_64BIT),64,32)" \ "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ "$(if $(part-of-module),1,0)" "$(@)"; endif +cmd_record_mcount = \ + if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ + $(sub_cmd_record_mcount) \ + fi; endif define rule_cc_o_c -- cgit v1.2.3-59-g8ed1b From 35d3778a8fe3c8b4a7513565e34d3bde00ce43ec Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Nov 2010 10:43:55 +0100 Subject: scripts/tags.sh: Add magic for trace-events Make tags find the trace-event definitions Signed-off-by: Peter Zijlstra Acked-by: WANG Cong LKML-Reference: <1290591835.2072.438.camel@laptop> Signed-off-by: Ingo Molnar --- scripts/tags.sh | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'scripts') diff --git a/scripts/tags.sh b/scripts/tags.sh index 8509bb512935..bbbe584d4494 100755 --- a/scripts/tags.sh +++ b/scripts/tags.sh @@ -125,7 +125,9 @@ exuberant() -I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \ --extra=+f --c-kinds=-px \ --regex-asm='/^ENTRY\(([^)]*)\).*/\1/' \ - --regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' + --regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \ + --regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/' \ + --regex-c++='/^DEFINE_EVENT\(([^,)]*).*/trace_\1/' all_kconfigs | xargs $1 -a \ --langdef=kconfig --language-force=kconfig \ -- cgit v1.2.3-59-g8ed1b