Hello. When I sent my patch to fix PM support «http://www.linux-mips.org/archives/linux-mips/2005-07/msg00255.html»; I modified function counter0_irq() as follow: #ifdef CONFIG_PM -void counter0_irq(int irq, void *dev_id, struct pt_regs *regs) +irqreturn_t counter0_irq(int irq, void *dev_id, struct pt_regs *regs) { unsigned long pc0; int time_elapsed; static int jiffie_drift = 0; - kstat.irqs[0][irq]++; if (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20) { I removed line «kstat.irqs[0][irq]++;» since I supposed that counter is managed by __do_IRQ(), but now I notice that without such line reading from /proc/interrups I get: hostname:~# while sleep 1 ; do grep 17: /proc/interrupts ; done 17: 31710 Au1000 Rise Edge Au1xxx TOY 17: 32236 Au1000 Rise Edge Au1xxx TOY 17: 32762 Au1000 Rise Edge Au1xxx TOY 17: 33288 Au1000 Rise Edge Au1xxx TOY 17: 33814 Au1000 Rise Edge Au1xxx TOY 17: 34340 Au1000 Rise Edge Au1xxx TOY 17: 34866 Au1000 Rise Edge Au1xxx TOY 17: 35392 Au1000 Rise Edge Au1xxx TOY Where you can see that I have 500 ticks per second... Applying this patch: Index: arch/mips/au1000/common/time.c =================================================================== RCS file: /home/develop/cvs_private/linux-mips-exadron/arch/mips/au1000/common/time.c,v retrieving revision 1.2 diff -u -r1.2 time.c --- a/arch/mips/au1000/common/time.c 18 Jul 2005 17:16:57 -0000 1.2 +++ b/arch/mips/au1000/common/time.c 24 Jul 2005 14:31:32 -0000 @@ -125,6 +125,8 @@ int time_elapsed; static int jiffie_drift = 0; + kstat_this_cpu.irqs[irq]++; + if (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20) { /* should never happen! */ printk(KERN_WARNING "counter 0 w status error\n"); Everything works well... but I'm a little puzzled about it. Can someone of you (guru) explain it? :-p Thanks, Rodolfo -- GNU/Linux Solutions e-mail: giometti@xxxxxxxx Linux Device Driver giometti@xxxxxxxxxxxx Embedded Systems home page: giometti.enneenne.com UNIX programming phone: +39 349 2432127
