<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7654.12">
<TITLE>RE: fix lockup issue left with one core</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/plain format -->
<P><FONT SIZE=2>Does it show one or two CPUs at bogomips 4790?<BR>
<BR>
I notice on my mint system, in dmesg:<BR>
<BR>
[ 0.180737] Brought up 2 CPUs<BR>
[ 0.180739] smpboot: Total of 2 processors activated (12801.34 BogoMIPS)<BR>
<BR>
So do you see 2 or 1 there in your version? (Assuming you get a similar message)<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: plug-discuss-bounces@lists.phxlinux.org on behalf of Derek Trotter<BR>
Sent: Tue 8/13/2013 8:13 PM<BR>
To: Main PLUG discussion list<BR>
Subject: Re: fix lockup issue left with one core<BR>
<BR>
Update. I tried encoding that video again, but without the noapic and<BR>
nolapic options. Handbrake was encoding the video at between 35 and 40<BR>
frames per second. When I rebooted and tried again with the noapic and<BR>
noalpic options enabled, Handbrake was encoding the same video with the<BR>
same settings at 17 to 20 frames a second. So is this something unique<BR>
to Handbrake or is there something else going on?<BR>
<BR>
Derek<BR>
<BR>
First I checked /proc/cpuinfo which had 4790.8 as the value for bogomips<BR>
with noapic and nolapic in the grub2 config. I removed these options<BR>
and rebooted. This time I got 4791.43. So I'm guessing that if I<BR>
lost anything, it's not enough to matter. Am I right?<BR>
<BR>
Thanks<BR>
<BR>
On 08/13/2013 02:56 PM, Carruth, Rusty wrote:<BR>
><BR>
> Compare the bogomips of the dual-core boot and the single-core boot.<BR>
><BR>
> Â<BR>
><BR>
> If the bogomips of the single-core is 2x the bogo of the dual<BR>
> core, then you’ve not lost anything – you are simply letting Linux<BR>
> control the sharing of the CPU instead of the CPU.<BR>
><BR>
> Â<BR>
><BR>
> (at least for the stupid hyperthreading stuff, all hyperthreading did<BR>
> was give you two CPUs running at half the clock speed of the CPU… <BR>
> Helped Windows users since Windows did such a bad job of time slicing<BR>
> on a single CPU…)<BR>
><BR>
> Â<BR>
><BR>
> Â<BR>
><BR>
> *From:*plug-discuss-bounces@lists.phxlinux.org<BR>
> [<A HREF="mailto:plug-discuss-bounces@lists.phxlinux.org">mailto:plug-discuss-bounces@lists.phxlinux.org</A>] *On Behalf Of *Derek<BR>
> Trotter<BR>
> *Sent:* Tuesday, August 13, 2013 2:53 PM<BR>
> *To:* Main PLUG discussion list<BR>
> *Subject:* fix lockup issue left with one core<BR>
><BR>
> Â<BR>
><BR>
> So far this beast has behaved itself for 3 days. Today I handbrake on<BR>
> a tv show episode I have on dvd. It's a 30 minute show and Handbrake<BR>
> normally takes about 20 minutes to encode a 30 minute show. This<BR>
> time I noticed the estimation of how long it would take hovered around<BR>
> 45 minutes. I then opened top and pressed 1 once it started. It<BR>
> showed only cpu0. Shouldn't cpu1 also be there? I looked around<BR>
> online and found that using the noapic option in grub only allows one<BR>
> core of a multi core processor to run. Is there any way to enable<BR>
> apic and lapic if necessary without it causing my machine to lock up<BR>
> again?<BR>
><BR>
> Thanks<BR>
><BR>
> --<BR>
> "I get my copy of the daily paper, look at the obituaries page, and if I’m not there, I carry on as usual."<BR>
> Â<BR>
> Patrick Moore<BR>
><BR>
><BR>
> ---------------------------------------------------<BR>
> PLUG-discuss mailing list -PLUG-discuss@lists.phxlinux.org<BR>
> To subscribe, unsubscribe, or to change your mail settings:<BR>
> <A HREF="http://lists.phxlinux.org/mailman/listinfo/plug-discuss">http://lists.phxlinux.org/mailman/listinfo/plug-discuss</A><BR>
<BR>
--<BR>
"I get my copy of the daily paper, look at the obituaries page, and if I’m not there, I carry on as usual."<BR>
<BR>
Patrick Moore<BR>
<BR>
<BR>
</FONT>
</P>
</BODY>
</HTML>