Date: Tue, 26 Aug 2003 23:30:01 +0900 (JST) From: Yamada Ken Takeshi <ken@tydfam.jp> To: current@freebsd.org, obrien@freebsd.org Subject: Re: HTT on current Message-ID: <20030826.233001.730554593.ken@tydfam.jp> In-Reply-To: <20030825164907.GA17503@dragon.nuxi.com> References: <JCEIKJMCANNPGKFKGLKLOENEDJAA.mikej@trigger.net> <3F4A1CE2.6080806@freebsd.org> <20030825164907.GA17503@dragon.nuxi.com>
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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
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