< ARM | N900 | Performance
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about bootchart
bootchart generates svg images that can be checked for example with inkscape from the timing of boot process
- what processes are launched
- in what time certain process is launched
- how much cpu the process has used
install
- install required tools to N900
- zypper install bootchart acct
- build kernel with required debug modules build in to get detailed pic (with default kernel you will get picture from the cpu usage but not the process details)
- CONFIG_BSD_PROCESS_ACCT_V3=y, CONFIG_OPROFILE=y, CONFIG_GCOV_KERNEL=y were enabled at least for me
- load and boot the kernel by using flasher, note the final init command for starting up bootchart
- flasher-3.5 -l -k zImage -b"root=/dev/mmcblk0p1 rootwait rw console=ttyO2,115200n8 console=tty0 omapfb.vram=0:2M,1:2M,2:2M mtdoops.mtddev=2 init=/sbin/bootchartd-long"
- open the generated /var/log/bootchart*.svg