kern/103939: No message "Hyperthreading: "

Maxim Konovalov maxim at macomnet.ru
Tue Oct 3 08:30:34 PDT 2006


The following reply was made to PR kern/103939; it has been noted by GNATS.

From: Maxim Konovalov <maxim at macomnet.ru>
To: Helmut Schellong <var at schellong.biz>
Cc: bug-followup at freebsd.org
Subject: Re: kern/103939: No message "Hyperthreading: "
Date: Tue, 3 Oct 2006 19:29:16 +0400 (MSD)

 [...]
 > >Description:
 > Kernel from disc1 FBSD 6.0 shows:
 >  "Hyperthreading: 2 logical CPUs".
 >
 > Kernel from disc1 FBSD 6.2-BETA# does not show:
 >  "Multiprocessor: 2 real CPUs"
 >  "Hyperthreading: 4 logical CPUs":
 >
 > Cores per package: 2
 
 Yes, now it executes the following code:
 
 +                       if (cmp > 1)
 +                               printf("\n  Cores per package: %d", cmp);
 +                       if ((htt / cmp) > 1)
 +                               printf("\n  Logical CPUs per core: %d",
 +                                   htt / cmp);
 
 Though you need to set machdep.hlt_logical_cpus=1 to enable HTT
 support.
 
 -- 
 Maxim Konovalov


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