Bogomips and loops_per_jiffy

Jean-Denis Boyer jdboyer at mediatrix.com
Sat May 11 00:54:50 EST 2002


Gabriel, (sorry to all for the previous incomplete mail!)

> I don't yet understand this explanation. Jiffy stamp is
> initialized in time_init, in the line:
>
> last_jiffy_stamp(0) = tb_last_stamp = stamp;
>
> and then jiffy_stamp is simply a temporary copy of
> last_jiffy_stamp in the interrupt handler.

Mmmm! You are right! I was annoyed of always getting the message,
 "Warning: real time clock seems stuck!"
and it also caused a 1-2 seconds delay before getting something printed to
the serial port on boot up. So I set the value of ppc_md.get_rtc_time to
NULL, since I have no RTC. That is why I never enter this code in time_init.
It correctly removed the annoying message, but brought this insidious bug.

Regards,

--------------------------------------------
 Jean-Denis Boyer, B.Eng., System Architect
 Mediatrix Telecom Inc.
 4229 Garlock Street
 Sherbrooke (Québec)
 J1L 2C8  CANADA
 (819)829-8749 x241
--------------------------------------------

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