[DGD] Hydra

[Pär Winzell]

I am looking into getting a pretty beefy workstation. It won't literally be
a server, but I'll probably spring for a 14-core Skylake X (3.1 GHz.) It'll
be by far the most money I've ever spent on a CPU, but I do a lot of work
these days on multi-threaded applications, everything is as RAM-intensive
as ever, and my current machine is getting old.

It'll dual boot Windows and Linux, so if it's still meaningful I can run
this in a few configurations.

Zell


On Sun, Sep 16, 2018 at 12:26 PM <bart at wotf.org> wrote:

> On Sun, 16 Sep 2018 17:45:51 +0200, Felix A. Croes wrote
>
> <snip>
>
> > I think what we are seeing here is a system trying to decide
> > whether to run everything on one CPU or two CPUs, and doing a lot of
> > catch-up copying when changing strategies.  When the number of
> > active CPUs is unambiguously higher than the core count of a
> > single CPU, it performs worse for 50 recipients, but better for
> > 100 recipients.
>
> Linux has different schedulers. If it is useful for you, I could rerun the
> test with those different schedulers. I'm not sure which one was active
> while
> I ran the test, as this is normally managed by tuned on this system. This
> is
> because my everyday use of this system is as an esxi server which among
> other
> things runs one fairly big vm which has direct access to some pci-e devices
> for storage and networking. I can also boot that vm 'physically', which I
> did
> for running that test, and which I at times do when wanting a linux host on
> bare metal and with lots of cpu cores.
>
> If its interesting, I could also run the test in a VM on the same hardware
> (but limited to 4 cores and 8gb memory)
>
> Bart.
> --
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