Re: AMD Ryzen and NetBSD?

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Fri, Jun 30, 2017 at 04:55:40PM +0100, Patrick Welche wrote:
> On Fri, Jun 30, 2017 at 03:41:39PM +0000, maya%netbsd.org@localhost wrote:
> > On Fri, Jun 30, 2017 at 09:25:19AM +0100, Patrick Welche wrote:
> > > I'm happily running -current on a Ryzen 7 1700 / Asus PRIME X370-PRO.
> > > I wonder about its i/o though: I remember dd'ing zeros over old disks, and
> > > thought "this is slow", so I dd'd over 3 disks at once, with no change
> > > in individual "progress" bit rate, i.e. 3 times the bandwidth...
> > 
> > Are you specifying block size? dd is terribly slow without it.
> 
> I was using 64k - essentially the example in the "progress" man page.

Latency.  You want a double-buffered pipeline.

-- 
  Thor Lancelot Simon	                                     tls%panix.com@localhost

  "We cannot usually in social life pursue a single value or a single moral
   aim, untroubled by the need to compromise with others."      - H.L.A. Hart