Date: Mon, 25 Apr 2011 16:03:49 +0200 From: Bartosz Fabianowski <freebsd@chillt.de> To: Ian Smith <smithi@nimnet.asn.au> Cc: freebsd-stable@freebsd.org, John <john@theusgroup.com>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: System extremely slow under light load Message-ID: <4DB57F45.4080107@chillt.de> In-Reply-To: <20110425232429.N85801@sola.nimnet.asn.au> References: <4DA596D3.1090803@chillt.de> <op.vt1efdn68527sy@pinky> <BANLkTik5Jq1QP776xQ0zQvQ5MKYe4LQZUA@mail.gmail.com> <4DB44DA3.5060509@chillt.de> <4DB4589B.2020909@ksu.ru> <4DB45D6C.20203@chillt.de> <20110424182456.9DD03589@server.theusgroup.com> <4DB46ED4.2010500@chillt.de> <20110425004818.GA22579@icarus.home.lan> <4DB51F27.5010508@chillt.de> <20110425184728.C73992@sola.nimnet.asn.au> <4DB56CDA.50504@chillt.de> <20110425232429.N85801@sola.nimnet.asn.au>
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> Sorry to hear none of that helped. It seems a very serious problem, and > it would be useful to know if it behaves any better under linux or not. I am still on the hunt for a bootable Linux distribution. I am in the unfortunate situation of having no CD-Rs at hand. And because it is Easter, shops are closed. Most Linux distributions require you to run a proprietary tool from inside Windows or another Linux installation to create a bootable USB medium. I found a USB image for OpenSUSE but that failed to boot. I am continuing to hunt... > You need sysctl hw.acpi.cpu.cx_lowest="C2" instead .. that's what > /etc/rc.d/power_profile adjusts when you apply or remove power. > I doubt it's likely to help much given the scale of overheating. I use the correct sysctl now, the cx_lowest value changed from C1 to C2 for all CPUs but nothing seems to have changed otherwise: %sysctl dev.cpu | grep cx_usage dev.cpu.0.cx_usage: 100.00% 0.00% last 230us dev.cpu.1.cx_usage: 100.00% 0.00% last 216us dev.cpu.2.cx_usage: 100.00% 0.00% last 159us dev.cpu.3.cx_usage: 100.00% 0.00% last 323us dev.cpu.4.cx_usage: 100.00% 0.00% last 320us dev.cpu.5.cx_usage: 100.00% 0.00% last 357us dev.cpu.6.cx_usage: 100.00% 0.00% last 378us dev.cpu.7.cx_usage: 100.00% 0.00% last 374us > That's pretty sad. Not sure what the first two differing by only 1MHz > means .. but I'm out of ideas, and my depth. Thanks for all the tips. I will report back once I have had a chance to compare with Linux. If nothing else helps, I will call Dell again in the futile attempt to have them magically fix the issue somehow. - Bartosz
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