On 12 August 2017 at 13:35, Chris Samuel <sam...@unimelb.edu.au> wrote:
> Also remember that the kernel can enable C states that hurt performance > even > if they are disabled in the BIOS/UEFI. This was painfully apparent on our > first SandyBridge cluster that almost failed the performance part of > acceptance > testing until it got found. > > Now we boot all nodes with this in the kernel cmdline: > > intel_idle.max_cstate=0 processor.max_cstate=1 intel_pstate=disable > > Chris, Can you point to some good documentation on this? cheers L. ------ "The antidote to apocalypticism is *apocalyptic civics*. Apocalyptic civics is the insistence that we cannot ignore the truth, nor should we panic about it. It is a shared consciousness that our institutions have failed and our ecosystem is collapsing, yet we are still here — and we are creative agents who can shape our destinies. Apocalyptic civics is the conviction that the only way out is through, and the only way through is together. " *Greg Bloom* @greggish https://twitter.com/greggish/status/873177525903609857
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