From: "Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
"Jürgen Groß" <jgross@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: Slow (higher scheduling latency?) system after S3 - regression 4.17 -> 4.19 ?
Date: Fri, 3 Apr 2026 15:55:07 +0200 [thread overview]
Message-ID: <ac_Gu2lm4Jnoz7WN@mail-itl> (raw)
In-Reply-To: <ac5l-HgbDRcVkiWb@mail-itl>
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On Thu, Apr 02, 2026 at 03:02:15PM +0200, Marek Marczykowski-Górecki wrote:
> On Fri, Mar 27, 2026 at 01:47:55PM +0100, Marek Marczykowski-Górecki wrote:
> > Some further observation, this time regarding timers:
>
> In the meantime Roger suggested it might be about C-states. So, I just
> tried booting with max_cstate=0. I got this:
We had a design session on this issue, and managed to find (thanks Roger!)
that adding:
tsc_mode='always_emulate'
to the domU config fixes the issue. Now, the question is how to fix it
properly...
--
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
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next prev parent reply other threads:[~2026-04-03 13:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-25 12:23 Slow (higher scheduling latency?) system after S3 - regression 4.17 -> 4.19 ? Marek Marczykowski-Górecki
2026-03-25 19:13 ` Marek Marczykowski-Górecki
2026-03-26 8:21 ` Jan Beulich
2026-03-26 13:05 ` Marek Marczykowski-Górecki
2026-03-26 8:27 ` Jan Beulich
2026-03-26 12:44 ` Marek Marczykowski-Górecki
2026-03-26 13:20 ` Jan Beulich
2026-03-26 15:53 ` Marek Marczykowski-Górecki
2026-03-26 16:02 ` Jan Beulich
2026-03-27 12:47 ` Marek Marczykowski-Górecki
2026-04-02 8:23 ` Jan Beulich
2026-04-02 8:50 ` Jürgen Groß
2026-04-02 13:02 ` Marek Marczykowski-Górecki
2026-04-02 13:03 ` Jan Beulich
2026-04-03 13:55 ` Marek Marczykowski-Górecki [this message]
2026-04-06 15:29 ` Marek Marczykowski-Górecki
2026-04-07 6:14 ` Jan Beulich
2026-04-07 12:01 ` Marek Marczykowski-Górecki
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