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Thread-Topic: machdep.cpu_idle_hlt and SMP perf?
Thread-Index: AcYpgO2ghbRT9vAOQVivMK43pmHBlwAXoqQg
From: "Daniel Eriksson" <daniel_k_eriksson@telia.com>
To: <freebsd-current@freebsd.org>
Subject: RE: machdep.cpu_idle_hlt and SMP perf?
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I just finished running 6 sets of (make clean + buildworld +
buildkernel), toggling machdep.cpu_idle_hlt between enabled and disabled
each time (3 of each).

Hardware: 2 x Athlon MP 2600+ on a Tyan Tiger 2466 mobo with 768MB
memory
Disks: 4 x 36GB 10k rpm in RAID-5 config on a SmartArray 6302/64
controller (ciss)
Software: RELENG_6 from yesterday

machdep.cpu_idle_hlt=3D1
45.01
46.12
45.30

machdep.cpu_idle_hlt=3D0
43.47
43.09
43.29

Looks like machdep.cpu_idle_hlt=3D0 shaves ~2 min off the build-time on =
my
server.

/Daniel