lepd需要调用perf采集数据。perf在ubuntu可以使用如下命令安装：
sudo apt-get install linux-tools-common
但arm的perf就需要自己动手编译了。
首先确认kernel打开如下开关;
CONFIG_PERF_EVENTS=y CONFIG_HW_PERF_EVENTS=y
然后定义一个环境变量：CROSS_COMPILE_DIR= /home/xxx/linuxep/perf-toolchain
接下来做如下步骤操作：
1， 编译zlib(http://zlib.net/)
1)CC=arm-linux-gnueabi-gcc ./configure --prefix=$CROSS_COMPILE_DIR/libc/usr/ 2)make 3)make install
2，编译elfutil:(https://kojipkgs.fedoraproject.org/packages/elfutils/)
1）./configure --host=arm-linux-gnueabi --prefix=$CROSS_COMPILE_DIR/libc/usr/ --exec-prefix=$CROSS_COMPILE_DIR/libc/usr/
2）编辑Makefile：
from SUBDIRS = config m4 lib libelf libebl libdwfl libdw libcpu libasm backends \ src po tests to SUBDIRS = config m4 lib libelf libebl libdwfl libdw libasm backends \ src po tests
3）编辑backend/Makefile
from libebl_pic = libebl_i386_pic.a libebl_sh_pic.a libebl_x86_64_pic.a \ libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \ libebl_sparc_pic.a libebl_ppc_pic.a libebl_ppc64_pic.a \ libebl_s390_pic.a to libebl_pic = libebl_sh_pic.a \ libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \ libebl_sparc_pic.a libebl_ppc_pic.a libebl_ppc64_pic.a \ libebl_s390_pic.a
按如下方式注释掉一些代码：
noinst_LIBRARIES = $(libebl_pic) noinst_DATA = $(libebl_pic:_pic.a=.so) libelf = ../libelf/libelf.so #libdw = ../libdw/libdw.a #i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \ # i386_retval.c i386_regs.c i386_auxv.c i386_syscall.c #cpu_i386 = ../libcpu/libcpu_i386.a #libebl_i386_pic_a_SOURCES = $(i386_SRCS) #am_libebl_i386_pic_a_OBJECTS = $(i386_SRCS:.c=.os) sh_SRCS = sh_init.c sh_symbol.c sh_corenote.c sh_regs.c sh_retval.c libebl_sh_pic_a_SOURCES = $(sh_SRCS) am_libebl_sh_pic_a_OBJECTS = $(sh_SRCS:.c=.os) #x86_64_SRCS = x86_64_init.c x86_64_symbol.c x86_64_corenote.c x86_64_cfi.c \ #x86_64_retval.c x86_64_regs.c i386_auxv.c x86_64_syscall.c #cpu_x86_64 = ../libcpu/libcpu_x86_64.a #libebl_x86_64_pic_a_SOURCES = $(x86_64_SRCS) #am_libebl_x86_64_pic_a_OBJECTS = $(x86_64_SRCS:.c=.os) #libebl_i386.so: $(cpu_i386) #libebl_x86_64.so: $(cpu_x86_64)
4）在lib/Makefile libasm/Makefile src/Makefile删除Werror
5)make 6)make install
3, 可以开始编译perf了，代码在kernel/tools/perf里
1）编辑makefileCFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) EXTLIBS = -lpthread -lrt -lelf -lm -lebl -ldl -L$(CROSS_COMPILE_DIR)/libc/usr/lib ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -I$(CROSS_COMPILE_DIR)/libc/usr/include
2）make LDFLAGS=-static ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- DEBUG=1 LIBDW_DIR=$CROSS_COMPILE_DIR/libc/usr/ HAVE_CPLUS_DEMANGLE=1
没什么问题的话，就可以得到arm指令的perf了，enjoy。
上述步骤主要参考http://www.cnblogs.com/helloworldtoyou/p/5585152.html
没什么
