CentOS 5 Hardware :: 5.4 - No Speed Step / Turbo With Intel Xeon X5550 (Nehalem)
Dec 15, 2009
I just installed a new HP DL360 with 32 GB of RAM and a Intel Xeon X5550 which supports speed stepping and turbo mode. I've enabled turbo in the BIOS, but cannot seem to get CentOS 5.4 to make use of either of these features. I've been googling for a solution for a while now, and tried various things, such as installing cpufreq. However, when I type cpufreq-info, I get this:
# cpufreq-info
cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
[code]...
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Mar 9, 2010
I've got a dual Xeon 5570 (Nehalem) server. It clocks down properly, but never, under any circumstances that I've found, clocks up past its TSC. Even when running basically nothing but cat /dev/zero > /dev/null, nothing gets clocked higher than the TSC. Below is the turbostat output, which clearly knows what the hardware is actually capable of, but it never actually achieves it. I'm running Lenny, with backported kernel 2.6.30-bpo.2-amd64. I tried the 2.6.32 backport and there wasn't any difference. know where I should look next? BIOS settings? Do I need to change some kernel option and recompile?
# ./turbostat
Nehalem multiplier 22, TSC frequency 2933 MHz
Nehalem 4 cores active: 24 mult, max turbo frequency = 3200 MHz
Nehalem 3 cores active: 24 mult, max turbo frequency = 3200 MHz
Nehalem 2 cores active: 25 mult, max turbo frequency = 3333 MHz
Nehalem 1 core active: 25 mult, max turbo frequency = 3333 MHz
[Code]...
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Feb 25, 2010
I'm running Ubuntu Server 9.10 on a dual socket X5550 platform with hyperthreading disabled. There should be 8 cores available for running processes: dual-socket, quad-core. When I start 8 single-threaded, cpu-intensive processes running, top shows six processes running at 100% and two at 50% (presumably sharing the seventh core). No other processes are reported as having >1% cpu, and yet the 1-minute load average is listed as over 11.0?!
1) Why is it not running each process on its own core?
2) Why is the load average so much greater than 8?
3) Is there anything I can change in the configuration to fix this?
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Mar 24, 2010
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Feb 23, 2011
I am using Intel xeon processor on linux plotform using EL4.4. the following error message appear frequently.... the error shows like that
CPU 0 : Machine Chine Exception: 0000000000000004
Bank 0 : cc0000ff20040189 [0010c00002900300] at 0000000002008fc0
Bank 1 : f2000000000000105
Bank 2 : d000000000000153
Kernal Panic - not syncing : CPU Contest Corrupt
<0> Kernal Panic - not syncing : mm/page_alloc.c:410: spin_alloc(mm/Page_alloc.c:c036b9b4) already locked by mm/page_alloc.c/266
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Code: Select allcpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: acpi-cpufreq
[code]....
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Dec 19, 2010
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Feb 16, 2011
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Jul 10, 2010
how can i enable speed step on my pc. im using intel e5300 http://ark.intel.com/Product.aspx?id=35300 and ubuntu 10.04. here is the output of cat /proc/cpuinfo
Code:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
[Code].....
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Jul 27, 2011
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[URL]
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Mar 20, 2009
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From my analysis so far, I think that the issue lies with the fact that module acpi-cpufreq does not support Xeons and that there is no dedicated module for this processor family (e.g. p4-clockmod) module in the default kernel.
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