Gentoo Archives: gentoo-dev

From: Riyad Kalla <rsk@×××××××××.edu>
To: 'Denis Shcherbakov' <deniss@×××××××××.EDU>, gentoo-dev@g.o
Subject: RE: [gentoo-dev] SMP kernel halts system - hyperthreading??
Date: Thu, 19 Dec 2002 03:52:43
Message-Id: 000101c2a711$be91bd20$0200000a@rsk
In Reply to: [gentoo-dev] SMP kernel halts system - hyperthreading?? by Denis Shcherbakov
1 Denis,
2 That sounds like the server at work I'm using, nice machine..
3
4 Anywya, there was a thread on something like this in the forums, and it
5 basically turned out to be the SMP Gentoo kernel, the guy went to
6 vanilla kernel and everything worked just dandy. Can you verify this?
7 Maybe the kernel team needs to focus on something?
8
9 Can you run 4 threads of Seti@Home to see if it kills the machine? That
10 should be a good test as it will saturate your CPUs
11
12 Best,
13 -Riyad
14
15 -----Original Message-----
16 From: Denis Shcherbakov [mailto:deniss@×××××××××.EDU]
17 Sent: Wednesday, December 18, 2002 8:47 PM
18 To: gentoo-dev@g.o
19 Subject: [gentoo-dev] SMP kernel halts system - hyperthreading??
20
21
22
23 Dear gentoo-dev,
24
25 If some of you recall, I wrote to the list about a system halt resulting
26 from running C++ codes and it possibly having to do with nVidia graphics
27 or XFree 4.2.1.
28
29 Well, the problem persists in text mode also. It happens when 3 or more
30 CPU-intensive processes run simultaneously on the machine. I have an
31 SMP
32 kernel (2.4.19-gentoo-r7) with 2 Intel Xeon 2.2-GHz processors equipped
33 with hyperthreading technology.
34
35 I have 4 processors initialized at boot time, and 4 processors show up
36 in
37 "top". This is probably because of hyperthreading, as otherwise there
38 should be only two.
39
40 How do I turn off hyperthreading? Do you think hyperthreading is what's
41 breaking my system and it could be more stable without hyperthreading?
42 Can a certain process be confined only to a certain processor?
43
44 Thanks for any help!
45 Denis
46
47
48 --
49 gentoo-dev@g.o mailing list
50
51
52 --
53 gentoo-dev@g.o mailing list

Replies

Subject Author
Re: [gentoo-dev] SMP kernel halts system - hyperthreading?? Marko Mikulicic <marko@××××.org>