GNU bug report logs - #35461
[PATCH] vm: Pass -smp to QEMU to allow use of multiple cores.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Christopher Baines <mail <at> cbaines.net>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#35461: closed ([PATCH] vm: Pass -smp to QEMU to allow use of
 multiple cores.)
Date: Mon, 29 Apr 2019 20:14:01 +0000

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Your message dated Mon, 29 Apr 2019 21:12:59 +0100
with message-id <87wojcr2no.fsf <at> cbaines.net>
and subject line Re: [bug#35461] [PATCH] vm: Pass -smp to QEMU to allow use of multiple cores.
has caused the debbugs.gnu.org bug report #35461,
regarding [PATCH] vm: Pass -smp to QEMU to allow use of multiple cores.
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
35461: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=35461
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From: Christopher Baines <mail <at> cbaines.net>
To: guix-patches <at> gnu.org
Subject: [PATCH] vm: Pass -smp to QEMU to allow use of multiple cores.
Date: Sat, 27 Apr 2019 21:43:25 +0100

* gnu/build/vm.scm (load-in-linux-vm): Pass (parallel-job-count) to QEMU with
-smp to allow using multiple cores.
---
 gnu/build/vm.scm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 372cf63c68..ac99d6b1a3 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -145,6 +145,7 @@ the #:references-graphs parameter of 'derivation'."
     (_ #f))
 
   (apply invoke qemu "-nographic" "-no-reboot"
+         "-smp" (number->string (parallel-job-count))
          "-m" (number->string memory-size)
          "-object" "rng-random,filename=/dev/urandom,id=guixsd-vm-rng"
          "-device" "virtio-rng-pci,rng=guixsd-vm-rng"
-- 
2.21.0

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From: Christopher Baines <mail <at> cbaines.net>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 35461-done <at> debbugs.gnu.org
Subject: Re: [bug#35461] [PATCH] vm: Pass -smp to QEMU to allow use of
 multiple cores.
Date: Mon, 29 Apr 2019 21:12:59 +0100

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Ludovic Courtès <ludo <at> gnu.org> writes:

> Christopher Baines <mail <at> cbaines.net> skribis:
>
>> * gnu/build/vm.scm (load-in-linux-vm): Pass (parallel-job-count) to QEMU with
>> -smp to allow using multiple cores.
>
> Good idea, LGTM!

Great, I've pushed this to master now.

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