Jim Wilcoxson 4a1bfefa4a Minimize clock inaccuracies during system boot ...

The initial estimate for instructions per millisec (instpermses) was
much too low for modern CPUs, and was also only updated every 5
seconds.  Combined, these were causing the clock to be erratic during
the first 5-15 seconds of system boot.

This was easily noticed by running the MIPS benchmark program right
after a system boot, where instead of delaying 5 seconds, it might
only delay 2 seconds, and then would report a bogus MIPS rating.
Waiting a minute and running it again would give an accurate rating.

Adjusting the instpermsec initial value from 2000 to 40000 and
IPMSTIME time from 5000 ms to 1000 ms (every second vs 5 seconds)
fixes the problem.

2020-04-18 03:11:56 +00:00

70 KiB

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