OProfile

OProfile

sudo opcontrol --init

sudo opcontrol --vmlinux=/boot/vmlinuz-'uname -r'
OR uname -r ==> 3.13.0-35-generic
sudo opcontrol --vmlinux=/boot/vmlinuz-3.13.0-35-generic

sudo operf --event=CPU_CLK_UNHALTED:100000
OR sudo opcontrol --event=CPU_CLK_UNHALTED:100000
operf --event=CPU_CLK_UNHALTED:100000 --event=LLC_MISSES:100000 ./build/megakv

opcontrol --list-events
Measure cache miss: LLC_MISSES/LLC_REFS

/* opcontrol discouraged */
sudo opcontrol --start
sudo opcontrol --stop
sudo opcontrol --reset
sudo opcontrol --dump

/* use operf instead */
operf ./my_app args...

sudo opreport
# opreport -l /path/to/mybinary
opreport -l ./build/megakv

# opannotate --source --output-dir=[any name] /path/to/mybinary
# [any name] is the directory name to be created under current directory,
# stores the annotated source file.
opannotate --source --output-dir=abc ./build/megakv



调试kernel，要先链接一下
ln -s  /home/kay/git.tenKernPktgen/pktgen4Nehalem8/pktgen_pcap_6.ko /pktgen_pcap_6
再opannotate
opannotate --source --output-dir=/home/kay/new /pktgen_pcap_6