Dear Cliff My system use FromDevice get packet from wireless and ethernet driver. you mean FromDeivce used interrupt is irq but not the softirq?
I can't distinguish between irq and softirq at driver , FromDevice and ToDevice. 2009/11/29 Cliff Frey <[email protected]> > 56% softirq implies to me that 56% of the time is spent in the packet > receive functions in your ethernet or wireless driver.... as click should > not be running at softirq context. 15% irq means that 15% of the time is > actually in interrupt handlers, again that is likely your wireless and/or > ethernet drivers. So I don't think that your performance problem is in > kclick itself. Probably you could get 10% better performance if you were > able to get rid of many many click elements in your data path... but I > really think that you should be looking at your ethernet/wireless drivers > instead. > > As I said in my earlier email, you need to break down your problem into > smaller pieces before you can blame kclick for the performance. You could > also enable CONFIG_PROFILE in linux, which could give you insight into how > much time your drivers are spending on what lines of code... but it is a > fair amount of work. In addition, with some work you can get linux to also > profile your kernel modules... for instance: > http://lkml.indiana.edu/hypermail/linux/kernel/0405.1/1115.html > > Good luck. > > Cliff > > > On Sat, Nov 28, 2009 at 12:50 AM, Yongheng Qi <[email protected]> wrote: > >> I tested the NotifierQueue, the instance is the same as before. >> >> anyone have ideas? Thanks. >> >> This is the top result: >> >> Mem: 20540K used, 106700K free, 0K shrd, 0K buff, 6656K cached >> CPU: 0% usr 27% sys 0% nice 0% idle 0% io 15% irq 56% softirq >> Load average: 0.95 0.88 0.50 >> PID PPID USER STAT VSZ %MEM %CPU COMMAND >> 777 2 root RW 0 0% 99% [kclick] >> 807 691 root R 1960 2% 0% top >> 682 664 root S 1992 2% 0% /usr/sbin/dropbear -p 22 >> 691 682 root S 1972 2% 0% -ash >> >> > -- Yongheng Qi Mobile: +86 1390 119 7481 _______________________________________________ click mailing list [email protected] https://amsterdam.lcs.mit.edu/mailman/listinfo/click
