Re: failure notice (fwd)

Jakub Jelinek (
Sat, 28 Feb 1998 11:10:49 +0100 (MET)

> It's only when it happens in less than 1 second that it's an issue. Last
> I checked even Linux can't fork 16k times per second. But next year or
> the year after that's not an unreasonable figure given hardware and
> software improvements.

We are pretty close though. On 300MHz UltraII we have now fork+exit+wait
time around 100usec (that is fork 10k times per second), but I have ideas
how to speed that up (and with 50usec we can do 20k times per second).

On the other side, if I understood Davem's approach, the pids might get
reused sooner, after 32K/NR_TASKS (just in the rare case one task_slot will be
used for all the tasks forked), which is usually 64 times.

Jakub Jelinek | |
Administrator of SunSITE Czech Republic, MFF, Charles University
Ultralinux - first 64bit OS to take full power of the UltraSparc
Linux version 2.1.88 on a sparc64 machine (498.80 BogoMips).

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