While I was asleep yesterday, my machine reported on all 3 Konsoles :

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822

-- end of report --

I don't remember seeing this before : how concerned should I be ?

The present machine is 6 years old & has always worked very well ;
its CPU is an AMD. I plan to build a new machine in the next few months : should I accelerate my plans ?

--
========================,,============================================
SUPPORT ___________//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT `-O----------O---' purslowatchassdotutorontodotca

--- SoupGate-Win32 v1.05
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On 2021-09-24, at 05:58, Philip Webb <purslow@ca.inter.net> wrote:

While I was asleep yesterday, my machine reported on all 3 Konsoles :

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822

-- end of report --

I don't remember seeing this before : how concerned should I be ?

From the manpage:

Most errors can be corrected by the CPU by internal error correction mechanisms. Uncorrected
errors cause machine check exceptions which may kill processes or panic the machine. A small
number of corrected errors is usually not a cause for worry, but a large number can indicate
future failure.

When an uncorrected machine check error happens that the kernel cannot recover from then it
will usually panic the system. In this case when there was a warm reset after the panic
mcelog should pick up the machine check errors after reboot. This is not possible after a
cold reset.

If you are overclocking, try disabling it.

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210924 Andrew Udvare wrote:

On 2021-09-24, at 05:58, Philip Webb <purslow@ca.inter.net> wrote:

While I was asleep yesterday, my machine reported on all 3 Konsoles :
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822
-- end of report --

From the manpage:

Which man page is that ?

Most errors can be corrected by the CPU
by internal error correction mechanisms. Uncorrected errors cause
machine check exceptions which may kill processes or panic the machine.
A small number of corrected errors is usually not a cause for worry,
but a large number can indicate future failure.

So it looks as if the above was a correctable error.

When an uncorrected machine check error happens
that the kernel cannot recover from, then it will usually panic the system. In this case when there was a warm reset after the panic,
mcelog should pick up the machine check errors after reboot.
This is not possible after a cold reset.

No sign of any other effects : everything went on running.

If you are overclocking, try disabling it.

No, I never overclock anything (smile).

--
========================,,============================================
SUPPORT ___________//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT `-O----------O---' purslowatchassdotutorontodotca

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --9xlKJwxDScZByy5ql8SD2h9KqwzF8mq2O
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-GB
Content-Transfer-Encoding: quoted-printable

On 24/09/2021 06:48, Philip Webb wrote:

210924 Andrew Udvare wrote:

On 2021-09-24, at 05:58, Philip Webb <purslow@ca.inter.net> wrote:

While I was asleep yesterday, my machine reported on all 3 Konsoles :
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b >>> Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822
-- end of report --

From the manpage:

Which man page is that ?

man mcelog


--9xlKJwxDScZByy5ql8SD2h9KqwzF8mq2O--

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--- SoupGate-Win32 v1.05
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On Fri, Sep 24, 2021 at 8:23 AM Andrew Udvare <audvare@gmail.com> wrote:

On 24/09/2021 06:48, Philip Webb wrote:

210924 Andrew Udvare wrote:

On 2021-09-24, at 05:58, Philip Webb <purslow@ca.inter.net> wrote:

While I was asleep yesterday, my machine reported on all 3 Konsoles

:

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4:

9d0b4c16001d011b

Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0

APIC 0 microcode 6000822

-- end of report --

From the manpage:

Which man page is that ?

man mcelog

I have no direct experience with this error however I'd suggest it was most likely an error reading
a block of DRAM and not likely the CPU itself failing. I periodically get
mce errors on my i980
machine when running big PixInsight jobs and I hit thermal limits.

I'd suggest you run extensive memory tests and if you don't see any problems don't worry too much. Of course, it's always wise to do good backups in case the problem gets worse.

Good luck,
Mark

<div dir="ltr"><br><br>On Fri, Sep 24, 2021 at 8:23 AM Andrew Udvare &lt;<a href="mailto:audvare@gmail.com">audvare@gmail.com</a>&gt; wrote:<br>&gt;<br>&gt; On 24/09/2021 06:48, Philip Webb wrote:<br>&gt; &gt; 210924 Andrew Udvare wrote:<br>&gt; &gt;&gt;
On 2021-09-24, at 05:58, Philip Webb &lt;<a href="mailto:purslow@ca.inter.net">purslow@ca.inter.net</a>&gt; wrote:<br>&gt; &gt;&gt;&gt; While I was asleep yesterday, my machine reported on all  3  Konsoles :<br>&gt; &gt;&gt;&gt; Message from syslogd@  
at Thu Sep 23 19:38:11 2021 ...<br>&gt; &gt;&gt;&gt; : mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b<br>&gt; &gt;&gt;&gt; Message from syslogd@  at Thu Sep 23 19:38:11 2021 ...<br>&gt; &gt;&gt;&gt; : mce: [Hardware Error]: TSC
0 ADDR 19e617980 MISC c01a000001000000<br>&gt; &gt;&gt;&gt; Message from syslogd@  at Thu Sep 23 19:38:11 2021 ...<br>&gt; &gt;&gt;&gt; : mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822<br>&gt; &gt;&gt;&gt; --
end of report --<br>&gt; &gt;&gt;  From the manpage:<br>&gt; &gt;<br>&gt; &gt; Which man page is that ?<br>&gt;<br>&gt; man mcelog<div><br></div><div>I have no direct experience with this error however I&#39;d suggest it was most likely an error readingÂ
 </div><div>a block of DRAM and not likely the CPU itself failing. I periodically get mce errors on my i980</div><div>machine when running big PixInsight jobs and I hit thermal limits.</div><div><br></div><div>I&#39;d suggest you run extensive memory
tests and if you don&#39;t see any problems</div><div>don&#39;t worry too much. Of course, it&#39;s always wise to do good backups in case</div><div>the problem gets worse.</div><div><br></div><div>Good luck,</div><div>Mark</div><div><br></div></div>

--- SoupGate-Win32 v1.05
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210924 Mark Knecht wrote:

On 2021-09-24, at 05:58, Philip Webb <purslow@ca.inter.net> wrote:

While I was asleep yesterday, my machine reported on all 3 Konsoles
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9d0b4c16001d011b
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: TSC 0 ADDR 19e617980 MISC c01a000001000000
Message from syslogd@ at Thu Sep 23 19:38:11 2021 ...
: mce: [Hardware Error]: PROCESSOR 2:600f20 TIME 1632440315 SOCKET 0 APIC 0 microcode 6000822

I have no direct experience with this error,

however I'd suggest it was most likely an error
reading a block of DRAM and not likely the CPU itself failing.
I periodically get mce errors on my i980 machine
when running big PixInsight jobs and I hit thermal limits.

I thought you had written "1980 machine" (grin).

I'd suggest you run extensive memory tests
and if you don't see any problems don't worry too much.
It's always wise to do good backups in case the problem gets worse.

Everything is backed up, incl off-site.

On Fri, Sep 24, 2021 at 8:23 AM Andrew Udvare <audvare@gmail.com> wrote:

man mcelog

'man mcelog' + 'man mce' find nothing. does it need to be installed ?

Thanks for the advice so far.

--
========================,,============================================
SUPPORT ___________//___, Philip Webb
ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto
TRANSIT `-O----------O---' purslowatchassdotutorontodotca

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

man mcelog

'man mcelog' + 'man mce' find nothing. does it need to be installed ?

Yep and the package is called mcelog.

Did you check for any other messages before/after the mce errors?

Do you also have lm-sensors installed? Running sensord?

Genuine CPU issues seem pretty rare, so I would check for overheating or
power issues, and lm-sensors will help with that.

<div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
&gt;&gt; man mcelog<br>

&#39;man mcelog&#39; + &#39;man mce&#39; find nothing.  does it need to be installed ?<br></blockquote><div><br></div><div>Yep and the package is called mcelog.</div><div><br></div><div>Did you check for any other messages before/after the mce errors?<

</div><div><br></div><div>Do you also have lm-sensors installed? Running sensord?</div><div><br></div><div>Genuine CPU issues seem pretty rare, so I would check for overheating or power issues, and lm-sensors will help with that.<br></div></div></div>

--- SoupGate-Win32 v1.05
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