最近在看Linux内存管理，从head.S到main.c

#include#include#include#includestatic struct hrtimer timer;ktime_t kt;static enum hrtimer_restart hrtimer_handler(struct hrtimer *timer){//kt = ktime_set(1, 10);prin

首先，下载一份源代码：http://www.bitmover.com/lmbench/get_lmbench.html然后解压。export PATH=$PATH:/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/修改scripts/os，sc

最近在用perf分析性能，在imx6q上验证PMU event采样，发现cache-misses等硬件事件计数都是0，瞬间崩溃。傻乎乎分析啦perf代码，感觉应该不是perf代码原因，到freescale官网上找到一片类似的问题：https://community.nxp.com/thread/302685http://stackoverflow.com/questions/22567