linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: tsc: Fast TSC calibration failed with AMD B350M/Ryzen 3 2200G
Date: Mon, 7 Jan 2019 16:33:59 +0100	[thread overview]
Message-ID: <9f444c64-c221-e729-7eb5-fc4f093c16d3@molgen.mpg.de> (raw)
In-Reply-To: <alpine.DEB.2.21.1901071622160.2688@nanos.tec.linutronix.de>

[-- Attachment #1: Type: text/plain, Size: 1000 bytes --]

Dear Thomas,


On 01/07/19 16:24, Thomas Gleixner wrote:

> On Mon, 31 Dec 2018, Paul Menzel wrote:
> 
>> Linux 4.19.13 from Debian Sid/unstable logs the message below on the board MSI
>> MS-7A37/B350M MORTAR with the processor AMD Ryzen 3 2200G.
>>
>> As a result, the early time stamps do not seem to be working.
> 
>>> [    0.000000] DMI: Micro-Star International Co., Ltd. MS-7A37/B350M MORTAR (MS-7A37), BIOS 1.I0 11/06/2018
>>> [    0.000000] tsc: Fast TSC calibration failed
> 
> And the further boot log says:
> 
> [    0.036000] tsc: Unable to calibrate against PIT
> [    0.036000] tsc: using HPET reference calibration
> [    0.036000] tsc: Detected 3500.117 MHz processor
> 
> So the quick calibration in early boot fails because the PIT seems not to
> do what the kernel expects. Nothing we can cure :(

I see. Can AMD confirm that this is the expected behavior? If yes, should
the fast TSC calibration be skipped on these devices?


Kind regards,

Paul


[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 5174 bytes --]

  reply	other threads:[~2019-01-07 15:34 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-31 10:02 tsc: Fast TSC calibration failed with AMD B350M/Ryzen 3 2200G Paul Menzel
2019-01-07 15:24 ` Thomas Gleixner
2019-01-07 15:33   ` Paul Menzel [this message]
2019-01-11 20:43     ` Thomas Gleixner
2019-01-14 10:09       ` Paul Menzel
2019-01-22 16:53         ` Paul Menzel
2019-01-22 20:24           ` Lendacky, Thomas
2019-01-23 12:56             ` tsc: Fast TSC calibration failed with sever AMD Ryzen processor (2200G, 2400G, Ryzen 7 1700) Paul Menzel
2019-01-23 23:33               ` Lendacky, Thomas
2019-01-28 16:05                 ` Paul Menzel

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=9f444c64-c221-e729-7eb5-fc4f093c16d3@molgen.mpg.de \
    --to=pmenzel@molgen.mpg.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).