On Wed, 2007-04-25 at 16:50 +0400, Artem Kuchin wrote: > Richard Tector wrote: > > Artem Kuchin wrote: > >> I am just wondering if it is normal. > >> I have two xeon processors with HT on each of them. > >> When loading kernel says that 4 cpu's are found, > >> but when i do top i can see only 0 or 2 in the C > >> column. never 1 or 3. Is it normal? > >> > >> FreeBSD 6.2-STABLE (cvsed 1 day ago) > > If I remember correctly, HT is disabled by default for security > > reasons but there should be a sysctl to enable it. I believe there is > > also a paper by Colin Percival on the issue. > > > ahh, heck, i'll take my chances. I've read the paper and the attack > seem to me almost unreal. Also, everybody is in the jail on the server. > > > Note that in a lot of common loads, the use of HT with the standard > > scheduler does not yield any real benefits. > > Hmm. I just turned it on and already see that hosts are running generally > faster (it is a hosting server, 100+ site). No numbers though. It just > *SEEMS* faster. Anyway, it cannot make thing slower for sure, or > can it? > > -- > Regards, > Artem > > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Yes, quite easily.
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