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From: "Lance Albertson via RT" <hosting-request@osuosl.org>
To: mark@klomp.org
Cc: buildbot@sourceware.org
Subject: [support.osuosl.org #32563] Request CI hosting for builder.sourceware.org
Date: Fri, 5 Aug 2022 08:52:58 -0700	[thread overview]
Message-ID: <rt-4.0.4-105864-1659714778-961.32563-6-0@osuosl.org> (raw)
In-Reply-To: <rt-4.0.4-195587-1659663068-623.32563-6-0@osuosl.org>

On Thu Aug 04 18:31:08 2022, mark@klomp.org wrote:
> On Thu, Aug 04, 2022 at 05:29:12PM -0700, Lance Albertson via RT wrote:
> > Can you please confirm you have access and let me know how it looks?
> 
> It looks great. It already did its first build:
> https://builder.sourceware.org/buildbot/#/workers/26 Which also means it could
> create the container image without issue.

Awesome!

> Would it be possible to enable a few more cpus? Currently there are 8 online
> and 8 offline. For the larger testsuite from gcc it really helps to be able to
> run more tests in parallel (test time scales linear with the number of cpus).

Resolved via IRC:

08:39 < Ramereth> mjw: hmm, hyperthreading is enabled. I wonder if the kernel
      cpu mitigations that are enabled by default in the kernel are turning it
      off. Do you want me to adjust the kernel parameters to not do that?
08:40 < mjw> Ramereth, if you could and know how then yes please, since the same
      user (builder) runs everything there really isn't any data leak to
      prevent.
08:41 < Ramereth> ok, give me a moment to do that
08:41 < mjw> Or if there is, there are much simpler ways to leak things than
      trying to extract data through subtle timing issues exposed by
      hyperthreading :)
08:46 < Ramereth> CPU(s):                  16
08:46 < Ramereth> mjw: looks better
08:47 < mjw> Cool!\
08:47 < Ramereth> FWIW I just updated the ignition file in case we end up
      rebuilding it later to make sure that's the case again


FWIW I adjusted this on the running system by doing the following:

rpm-ostree kargs --replace=mitigations=auto,nosmt=off

And then rebooted the system.

Is there anything else you need for this?

-- 
Lance Albertson
Director
Oregon State University | Open Source Lab 

  parent reply	other threads:[~2022-08-05 15:53 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <RT-Ticket-32563@osuosl.org>
     [not found] ` <Yp5+pqvhR8WYiaqq@wildebeest.org>
     [not found]   ` <rt-4.0.4-32453-1654617175-469.32563-6-0@osuosl.org>
2022-06-07 22:24     ` Mark Wielaard
     [not found]       ` <rt-4.0.4-80639-1654640709-839.32563-6-0@osuosl.org>
2022-06-16 17:40         ` Lance Albertson via RT
2022-06-16 22:49           ` Mark Wielaard
2022-06-16 22:49             `  via RT
     [not found]             ` <rt-4.0.4-176523-1655419769-1468.32563-6-0@osuosl.org>
2022-06-20 19:36               ` Lance Albertson via RT
2022-06-20 22:06                 ` Mark Wielaard
2022-06-20 22:06                   `  via RT
     [not found]         ` <rt-4.0.4-135343-1655762795-1742.32563-6-0@osuosl.org>
2022-08-05  0:29           ` Lance Albertson via RT
2022-08-05  1:30             ` Mark Wielaard
2022-08-05  1:31               `  via RT
     [not found]               ` <rt-4.0.4-195587-1659663068-623.32563-6-0@osuosl.org>
2022-08-05 15:52                 ` Lance Albertson via RT [this message]
2022-08-05 21:17                   ` Mark Wielaard
2022-08-05 21:17                     `  via RT
     [not found]                     ` <rt-4.0.4-171867-1659734276-616.32563-6-0@osuosl.org>
2022-08-05 21:52                       ` Lance Albertson via RT

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