Hi Venki,
I'm confused by the calculation of the drift value in the hpet
driver. The specs defines the recommended minimum hardware
implementation is a frequency drift of 0.05% or 500ppm. However, the
drift passed in when registering with the time interpolator is:
ti->drift = ti->frequency * HPET_DRIFT / 1000000;
Isn't that absolute number of ticks per second drift? The time
interpolator defines the drift in parts per million. Shouldn't this
simply be:
ti->drift = HPET_DRIFT;
The current code seems to greatly penalize any hpet timer with greater
than a 1MHz frequency. Thanks,
Alex
--
Alex Williamson HP Linux & Open Source Lab
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |