Date: Sun, 24 Apr 2011 19:27:08 +0200 From: Bartosz Fabianowski <freebsd@chillt.de> To: "Marat N.Afanasyev" <amarat@ksu.ru> Cc: freebsd-stable@freebsd.org, "illoai@gmail.com" <illoai@gmail.com>, Ronald Klop <ronald-freebsd8@klop.yi.org> Subject: Re: System extremely slow under light load Message-ID: <4DB45D6C.20203@chillt.de> In-Reply-To: <4DB4589B.2020909@ksu.ru> References: <4DA596D3.1090803@chillt.de> <op.vt1efdn68527sy@pinky> <BANLkTik5Jq1QP776xQ0zQvQ5MKYe4LQZUA@mail.gmail.com> <4DB44DA3.5060509@chillt.de> <4DB4589B.2020909@ksu.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
> did you test the caches? I've seen such a behavior when cpu cache was > disabled. The Dell BIOS setup is very minimalistic and would not even allow me to turn off caches. So unless the FreeBSD boot loader somehow turned them off, the caches should be active. Is there some tool I can use to verify my caches are active? > and it can be thermal throttle in case of bad contact between > cpu and heatsink. try to reapply thermal compound The CPU temperature is about 60°C-70°C when idle, 80°-90°C under light load and exceeds 90°C under heavy load. All of these readings are obtained from sysctl dev.cpu as ACPI always reports a temperature of 0°C. If I fix the DSDT to correctly report temperatures, a medium to heavy load forces an emergency shutdown. To prevent this, I am running with the original broken DSDT and the CPU throttled from 1.8GHz to 1.3GHz where it never exceeds 90°C. Yes, the CPU is very warm. But it does not appear to be critically hot. The ACPI critical threshold is 95°C. It seems that this model (Dell Studio 15) always runs that hot. I have had several visits from a Dell technician who changed everything from heat pipe to complete motherboard. The temperatures never changed. Dell finally exchanged the entire laptop for a slightly newer model but the temperatures remained as they were. So reapplying thermal grease or even swapping components does not seem to change anything. Again, a tool would be useful that can tell me whether the CPU is throttling itself. Does such a thing exist? - Bartosz
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4DB45D6C.20203>