Date: Thu, 15 Jul 2010 01:09:47 +1200 (NZST) From: Atom Smasher <atom@smasher.org> To: Ed Schouten <ed@80386.nl> Cc: freebsd-hackers@freebsd.org Subject: Re: sysctl way too slow Message-ID: <1007150056561.5546@smasher> In-Reply-To: <20100714125503.GG1742@hoeg.nl> References: <1007142345320.5546@smasher> <20100714125503.GG1742@hoeg.nl>
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On Wed, 14 Jul 2010, Ed Schouten wrote:
> So what about other sysctls? Is it just these sysctls? It may be the
> case that these values are not simply read from some variable in the
> kernel, but really performs some hardware calls. Still, 436 msec is
> quite a lot of time.
===================
getting the same info on a linux box from /sys/class/power_supply/BAT0/*
takes <10ms, even when reading all 32 files in the directory.
meanwhile, on freebsd, the other hw.acpi.* variables i've tried are either
reasonably fast (2-7 mS) or as slow, but no slower. at least not the
handful that i've tried.
hw.acpi.battery.* are the ones i'm actually interested in.
--
...atom
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