Messages in this thread | | | Subject | Re: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible | From | Eric Dumazet <> | Date | Sat, 26 Mar 2011 09:15:27 +0100 |
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Le vendredi 25 mars 2011 à 21:29 +0100, Peter Zijlstra a écrit : > On Fri, 2011-03-25 at 10:38 +0100, Eric Dumazet wrote: > > > > BIOS : Version: I27 Release Date: 09/30/2010 > > > > [ 0.021849] CPU0: Intel(R) Xeon(R) CPU E5640 @ 2.67GHz stepping 02 > > [ 0.123904] Performance Events: PEBS fmt1+, Westmere events, Broken BIOS detected, using software events only. > > [ 0.124125] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is 330) > > Do the below instructions yield a working system?: > > > > On the BL460c G6/G7, one could perform the following steps: > > > > > > To configure BIOS low-latency options using RBSU > > > 1. Press F9 during POST to enter RBSU. > > > 2. Press CTRL-A to open the menu. > > > 3. Select Service Options. > > > 4. Disable either or both of the following options: > > > o Processor Power and Utilization Monitoring > > > o Memory Pre-Failure Notification > > > > > > By doing the above the BIOS should release the performance counter, and the > > > kernel's "perf" should not encounter a conflict. > > > > > > The document that you are looking for is here: (please see page 8 and later): > > > http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01804533/c01804533.pdf > > >
Thanks Peter !
I was not aware of the hidden "CTRL-A" feature on RBSU, so I never met these configuration settings ("Service Options" added in main menu)
I already was in "Power regulator mode : Static High mode" QPI Link power management : Disabled
I have latest released I24 BIOS DMI: HP ProLiant BL460c G6, BIOS I24 01/29/2011
1) I disabled "Power and Utilization Monitoring" _and_ "Memory Pre-Failure Notification"
Still I got the 'MSR 38d is 330' error
2) I then disabled Intel Turbo boost
Same error
3) Minimum Processor idle Power state From C1E-State --> No C-states
Same error
Tricky isnt it ?
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