SMP on 2.1.31

Richard B. Johnson (root@analogic.com)
Thu, 3 Apr 1997 16:12:25 -0500 (EST)


First good news: 2.1.31 compiles and runs okay.
Second bad news: 2.1.31 has a bit of a problem with CPU hogs.

The following code:

main() { for(;;) ; }

... when executed once, shows about 60-70% user CPU usage using top.
... when executed twice, shows about 120-150% user CPU usage using top.
... when executed thrice, halts top, but allows a reboot using ctl-alt-del.
If top is executed as `top -q`, it executes, showing 199% CPU usage.
However, one can't ^C out of any of the CPU hogs. If I quit 'top', the
^Cs become effective and I am able to regain control.

Cheers,
Dick Johnson
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Richard B. Johnson
Project Engineer
Analogic Corporation
Voice : (508) 977-3000 ext. 3754
Fax : (508) 532-6097
Modem : (508) 977-6870
Ftp : ftp@boneserver.analogic.com
Email : rjohnson@analogic.com, johnson@analogic.com
Penguin : Linux version 2.1.31 on an i586 machine (66.15 BogoMips).
Warning : I read unsolicited mail for $350.00 per hour. Supply billing address.
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