Re: ARAnyM speed
Hello,
What virtualization subsystem are you running? I have a i7 920 at home and it's pretty fast.
The only thing I can think of is maybe your running into a scenario where your VMs are pinned to threads that share the same CPU Core, and that might be inducing a bottle-neck somewhere.
Just out of curiosity, why pin the VM threads? The scheduler from what I've seen does a pretty good job with managing thread usage. Of course, it's much easier to monitor VMs from the host if you know which CPU is which. But tools like xentop (for xen) help with monitoring as well. And if 2 VMs are pinned to logical CPU0 and CPU1, they *might* be fighting for CPU time because of Intel HyperThreading. HT is a two-edged sword.
And Turbo Boost *may* also be playing a part in this too..although I've rarely *if ever* seen it kick in on Linux…especially if your CPU isn't exceeding the maximum TDP (thermal design power). If a CPU core or two needs extra speed, the i7 will temporarily adjust the multiplier up a couple of points on-the-fly, as long as heat output doesn't exceed the maximum.
Other things like AHCI mode for SATA vs IDE emulation on SATA make a huge difference with respect to I/O too.
I hope none of this offended you -- I'm just trying to help, as I really admire what you guys are doing with 68k equipment.
Britt
On May 11, 2013, at 8:31 PM, Thorsten Glaser wrote:
> Britton Dodd dixit:
>
>> I have a hunch but I'd like to verify a couple of things first --- how
>> many VMs are you running?
>
> One, then two, then four. Doesn't make a change,
> even the very first one had about half speed.
> Although I think I only switched governors after
> booting it. Maybe the first core was already on
> max, or something.
>
> Thanks,
> //mirabilos
> --
> 22:20⎜<asarch> The crazy that persists in his craziness becomes a master
> 22:21⎜<asarch> And the distance between the craziness and geniality is
> only measured by the success 18:35⎜<asarch> "Psychotics are consistently
> inconsistent. The essence of sanity is to be inconsistently inconsistent
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