9 Feb
2003
9 Feb
'03
9:36 a.m.
On Sun, Feb 09, 2003 at 11:13:53 +0100, David Olofson wrote:
On Sunday 09 February 2003 01.18, Steve Harris wrote:
[...silence and RT...]
There is also the instruction cache to think of. Practical experience
suggests that suddenly waking up a chain of plugins causes a spike of CPU
load which settles down. It may be possible to moderate this with carefull
coding however.
- Steve
I suspect (but have no intention of finding out)
that suddenly
waking up a large subnet will have large chace effects too, so it
wont be a case of just the CPU load varying.
I suspect that unless most of the memory used by each "mode" of the
net fits in the cache, the difference won't be all that big, since
every block cycle causes massive amounts of cache misses anyway.
Also, as soon as you have hand disk recording going on, you'll have a
butler thread throwing RT data out of the cache all the time. (Same
effect that has surprized some RTL and/or RTAI users by causing
*higher* latencies for the RT threads on faster CPUs.)