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[Bug 689720] New: Intel Turbo Boost not working Xeon X7560 under 2.6.34.7-0.7
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Mon, 25 Apr 2011 19:54:38 +0000
  • Message-id: <bug-689720-21960@http.bugzilla.novell.com/>

https://bugzilla.novell.com/show_bug.cgi?id=689720

https://bugzilla.novell.com/show_bug.cgi?id=689720#c0


Summary: Intel Turbo Boost not working Xeon X7560 under
2.6.34.7-0.7
Classification: openSUSE
Product: openSUSE 11.3
Version: Final
Platform: x86-64
OS/Version: openSUSE 11.3
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
AssignedTo: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
ReportedBy: petersch@xxxxxxxxxxx
QAContact: qa@xxxxxxx
Found By: ---
Blocker: ---


User-Agent: Mozilla/5.0 (X11; SunOS i86pc; rv:2.0) Gecko/20100101
Firefox/4.0

Intel Xeon X7560 is supposed to go up to 2.666 GHz, cf.
http://ark.intel.com/Product.aspx?id=46499

On a fully updated OpenSuse 10.3 system running
2.6.34.7-0.7-desktop x86_64
no process gets scheduled above 2262.000 MHz,
even when limited to a particular core with taskset.

Turbo Boost is enabled in the BIOS.

scaling_available_frequencies are identical for all cores:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
2262000 2261000 2128000 1995000 1862000 1729000 1596000 1463000 1330000 1197000
1064000


Reproducible: Always

Steps to Reproduce:
1. run any single high-load process
2.
3.
Actual Results:
# grep MHz /proc/cpuinfo | grep 2
cpu MHz : 2262.000


Expected Results:
# grep MHz /proc/cpuinfo | grep 2
cpu MHz : 2666.000

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