10 Jun
2003
10 Jun
'03
6:28 p.m.
Hyperthreading - the new fancy P4's have it. Does
it do anything on
linux? I saw some benchmarks where it really sped up video encoding (on
windows), how similar to sound processing is this?
Alan Cox says HT provides 0-30% speedup.
10 Jun
10 Jun
6:36 p.m.
tisdagen den 10 juni 2003 22.16 skrev Andrew Burgess:
There was a recent thread on the Jack mailinglist where it seemed likely that
latency would suffer when HT was enabled, if I read the thread right... It
may had to do with using HT _and_ dual processors though, can't remember...
/Robert
Hyperthreading
- the new fancy P4's have it. Does it do anything on
linux? I saw some benchmarks where it really sped up video encoding (on
windows), how similar to sound processing is this?
Alan Cox says HT provides 0-30% speedup. 
11:15 p.m.
On Tue, 2003-06-10 at 13:19, Robert Jonsson wrote:
tisdagen den 10 juni 2003 22.16 skrev Andrew Burgess:
There was a recent thread on the Jack mailinglist where it seemed likely that
latency would suffer when HT was enabled, if I read the thread right... It
may had to do with using HT _and_ dual processors though, can't remember...
The one I tested was a single processor P4 with HT enabled. With it
enabled I see latency spikes (10-15mseg) and weird behavior of Jack as
well. Steve (Harris) wrote something about threads not being happy on an
HT processor. So I guess we'll have to wait till there is better kernel
support (or maybe there is a kernel patch that fixes this?)
-- Fernando
Hyperthreading - the new fancy P4's have it. Does it do anything on
linux? I saw some benchmarks where it really sped up video encoding (on
windows), how similar to sound processing is this?
Alan Cox says HT provides 0-30% speedup.
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3 participants
participants (3)
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Andrew Burgess -
Fernando Pablo Lopez-Lezcano -
Robert Jonsson