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From: Jan Kiszka <jan.kiszka@web.de>
To: Rob Miller <rob.miller@broadcom.com>
Cc: xenomai <xenomai@xenomai.org>
Subject: Re: Xenomai fails to start when running in QEMU VM
Date: Thu, 24 Oct 2019 14:12:35 +0200	[thread overview]
Message-ID: <96377681-69a9-e2c5-d454-9732bc785938@web.de> (raw)
In-Reply-To: <CAJPjb1JCojSH_TmL0jwkBpCVhzNEJbPKsNMVkr_p5Wq2LLE+aQ@mail.gmail.com>

On 24.10.19 13:46, Rob Miller wrote:
> Pls see below
>
> Rob Miller
> rob.miller@broadcom.com <mailto:rob.miller@broadcom.com>
> (919)721-3339
>
>
> On Thu, Oct 24, 2019 at 6:25 AM Jan Kiszka <jan.kiszka@web.de
> <mailto:jan.kiszka@web.de>> wrote:
>
>     On 23.10.19 23:23, Rob Miller via Xenomai wrote:
>     > Correction, stock images work by removing the enable-kvm and *NOT
>     *adding
>     > the -no-hpet QEMU cmdline options.
>     >
>     > also latency numbers are crazy with avg being 1678.126 usec w/
>     worst case
>     > being 15463.240usec
>     >
>     > at this point, I'm not sure which way to go:
>     >
>     > 1) do I hunt down issues in HPET failing w/ KVM mode enabled?
>     > 2) just go to dovetail
>     > 3) ???
>
>     Don't have a the reference image around, but I'm pretty sure it would
>     work here with QEMU 4300b7c2cd9f3f273804e8cca325842ccb93b1ad (post 4.1)
>     and KVM from 5.3.6. At least a different image is being used like that
>     for ages, and kernel config in xenomai-image is basically derived
>     from it.
>
> RJM>] Will try 
>
>
>     For the xenomai-images check, did you use "start-qemu.sh x86" as-is?
>
> RJM>] Yes, my 1st failed attempts used unmodified start-qemu.sh x86,
> then I mod'd the file to remove the -enable-kvm, and it started to work
> UNTIL also added -no-hpet, then I can't even boot up.
>

Number of host cores >= number of guest CPUs? If not, reduce -smp in the
QEMU invocation.

Oh, and don't expect any kind of determinism in these setups. KVM and
QEMU are for functional testing only.

Jan


  reply	other threads:[~2019-10-24 12:12 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-11 17:25 Xenomai fails to start when running in QEMU VM Rob Miller
2019-10-11 17:32 ` Jan Kiszka
2019-10-23 12:48   ` Rob Miller
2019-10-23 13:26     ` Gylstorff Quirin
2019-10-23 16:07       ` Rob Miller
2019-10-23 19:52         ` Rob Miller
2019-10-23 21:02           ` Rob Miller
2019-10-23 21:23             ` Rob Miller
2019-10-24 10:25               ` Jan Kiszka
2019-10-24 11:46                 ` Rob Miller
2019-10-24 12:12                   ` Jan Kiszka [this message]
2019-10-24 13:38                     ` Rob Miller
2019-10-24 14:21                       ` Henning Schild
2019-11-04 11:24                       ` Jan Kiszka

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