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To: current@freebsd.org, obrien@freebsd.org
From: Yamada Ken Takeshi <ken@tydfam.jp>
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Subject: Re: HTT on current
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  JYI,
  I tested machdep.hlt_logical_cpus=0/1, buildworld, 
and found no particular reason to disable HTT 
as below with Zeon 2.8Ghz x 2, 1GBmem, Slow IDE HDD.

 It may not be the common case, so just for your info.

# sysctl machdep.hlt_logical_cpus=0
# /usr/bin/time make -j32 buildworld
     1910.29 real      2520.53 user       777.30 sys

# sysctl machdep.hlt_logical_cpus=1
# /usr/bin/time make -j32 buildworld
     2289.33 real      2666.66 user       645.88 sys