Re: ARAnyM speed
I don't mean to be a bother -- I am sincerely interested in figuring out this puzzle.
I have a hunch but I'd like to verify a couple of things first --- how many VMs are you running?
Thanks,
Britt
On May 11, 2013, at 6:10 PM, Thorsten Glaser wrote:
> Hi *,
>
> I’ve upgraded my desktop at work:
>
> • from Kubuntu Hardy (8.04) to Debian unstable (sid), still i386
> • from aranym_0.9.13-3.1 to whatever Debian sid carries (0.9.15-1)
> • from a 4x3.2 GHz AMD system to an 8x3.1 GHz Intel system
>
> My VMs, despite turning on the “performance” governor by writing
> into sysfs, have only half the speed of before (roughly 500 ipv
> 1000 pystones/sec, 70/70/61/65 instead of 192/192/192/90 BogoMIPS;
> the last VM to start was always a bit slower).
>
> In /proc/cpuinfo I have
> cpu MHz : 3060.000
> for all eight host cores (now), though.
>
> I did have issues with governors in the past; even on hardy, the
> last VM to start was slower, and sometimes I had to start them
> several times to get the full BogoMIPS value.
>
> I do pin VMs to single CPU cores by using taskset with a first
> argument that has only a single bit set (0x1, 0x2, 0x4, 0x8).
>
> Does anyone else see that, and which of the changes are most
> likely responsible? (Debian also builds with hardening I think,
> which Kubuntu hardy didn’t do.) I’ve not yet done any real
> testing, but I can probably run a hardy chroot and compare
> (that keeps hardware and kernel but not the userspace); might
> be able to install hardy to an LV and boot it with its own
> kernel, too… the old mainboard was broken, so can’t easily
> test it… but maybe someone else here sees differences between
> versions on the same hardware, or across hardware with similar
> nominal speed.
>
> For the record: the new CPU is
> Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
> and the old one was an AMD X4 II or something like that.
>
> Ah. Before, I ran the hardy i386 -server kernel; now I run
> the sid amd64 kernel (with i386 userspace).
>
> bye,
> //mirabilos
> --
> 15:39⎜«mika:#grml» mira|AO: "mit XFree86® wär’ das nicht passiert" - muhaha
> 15:48⎜<thkoehler:#grml> also warum machen die xorg Jungs eigentlich alles
> kaputt? :) 15:49⎜<novoid:#grml> thkoehler: weil sie als Kinder nie den
> gebauten Turm selber umschmeissen durften? -- ~/.Xmodmap wonders…
>
>
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