Re: Windows CPU power settings

2016-12-20 Thread Jim Blandy
On Fedora, that'd be the kernel-tools package, and the "cpupower frequency-info" command, I think? On Sat, Dec 17, 2016 at 11:04 PM, Bobby Holley wrote: > It looks like there are similar (though not as bad) shenanigans on Linux. > > In a fresh Ubuntu install, there are

Re: Windows CPU power settings

2016-12-17 Thread Bobby Holley
It looks like there are similar (though not as bad) shenanigans on Linux. In a fresh Ubuntu install, there are two available frequency governors, "powersave" and "performance". The default is "powersave", which seems suboptimal on a Desktop Xeon. The intel_pstate driver doesn't support manually

Re: Windows CPU power settings

2016-12-13 Thread Ben Kelly
On Mon, Dec 12, 2016 at 8:44 PM, Gregory Szorc wrote: > The Windows 10 power settings appear to set the minimum CPU frequency at 5% > or 10% of maximum. When I cranked this up to 100%, artifact build time > dropped from ~170s to ~77s and full build configure dropped from ~165s

Windows CPU power settings

2016-12-12 Thread Gregory Szorc
I've been assessing new hardware options for Mozilla to issue to developers. As part of evaluating some dual socket Xeon processors, I found some unexpected behavior: these processors routinely underclock in Windows 10 unless several cores or are used. Contrast with the behavior of my i7 Skylake