On Fri, 8 Sep 2000 [EMAIL PROTECTED] wrote:
> The code below is very short and simple. It compiles with the standard
> options available as variables in rtl.mk, and the module depends on
> rtl_sched and rtl_time. All you have to do is compile, insert, wait(for me
> 30 seconds is enough), and dmesg.
>
> Typical dmesg output
>
> > Delay of 192ns near 0ms
> > Delay of 288ns near 95ms
> > Delay of 352ns near 1609ms
> > Delay of 384ns near 1648ms
> > Delay of 448ns near 23322ms
> > Delay of 1141792ns near 937517ms
> > Delay of 1224000ns near 1530446ms
My is (2.2.17pre19 non SMP rtlinux30pre6c aka 2.3-pre3):
Delay of 160ns near 0ms
Delay of 192ns near 1ms
Delay of 256ns near 318337ms
Delay of 288ns near 318573ms
Delay of 448ns near 319886ms
Delay of 512ns near 320861ms
BTW: RTL maintainers, could you add RTL version printout around the message
Real-Time Linux Extensions Loaded.... ?
At around 300000 ms I have started "make -j6 bzImage", before the system was
idle. My results are probably some kind of cache misses. And 512 ns is OK.
I will let it run overnight. This is:
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 400.907
cache size : 64 KB
running on GA-5AA REV 2.2 motherboard with 32 MB RAM.
> tick_time = clock_gethrtime(CLOCK_REALTIME); //check time
> tock_time = clock_gethrtime(CLOCK_REALTIME); //check time
Sorry, I was not familiar with clock_gethrtime function. All my comments
about reading RTC clock and ISA are probably not valid here, since this is
probably using TSC clock.
Best regards,
--
Tomek
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