Gentoo Archives: gentoo-amd64

From: Beso <givemesugarr@×××××.com>
To: gentoo-amd64@l.g.o
Subject: Re: [gentoo-amd64] Re: 3200+ -> X2 4000+
Date: Fri, 13 Jul 2007 10:57:46
Message-Id: d257c3560707130354q7e98dd46jd1cbc060ffd5345@mail.gmail.com
In Reply to: Re: [gentoo-amd64] Re: 3200+ -> X2 4000+ by Thanasis
1 try using powerthend as a daemon with userspace governor under linux, and in
2 winzoz download the cpu program for dual core daemon from amd site....
3 powethend gives you the power you need when you need it, and for i have
4 learned it is able to handle both cores....
5
6 2007/7/12, Thanasis <thanasis@××××××××××.org>:
7 >
8 > on 07/12/2007 01:17 PM Bernhard Auzinger wrote the following:
9 > >>>> bogomips : 3611.22
10 > >>>> TLB size : 1024 4K pages
11 > >>>>
12 > >>>> bogomips : 1603.39
13 > >>>> TLB size : 1024 4K pages
14 > >>>>
15 > >>>> 2) Just curious: Why is there such a big difference between the 2
16 > CPUs'
17 > >>>> bogomips values reported?
18 > >>>> --
19 > >>>> gentoo-amd64@g.o mailing list
20 > >> --
21 > >> Piotr
22 > >
23 > > There has to be no difference between the two cores on dual-core
24 > processors.
25 > > That's because the bogomips-benchmark is a "calculated" benchmark that
26 > > depends mostly on the clock frequency and since the two cores on
27 > dual-core
28 > > athlons/opterons use the same clock, it's not possible to have different
29 > > values on that type of dual-core processor. I've absolutely identical
30 > values
31 > > (4825.77 bogomips) for both cores of my Athlon64 X2 4600+.
32 > >
33 > > If you have two processors (f.ex. two single-cores) on your mainboard,
34 > than
35 > > you will have two slightly different values because of the slightly
36 > different
37 > > clock of the two processors. In your case it seems that the second
38 > processor
39 > > has a decreased clock. I'm sure you have enabled cool'n'quiet.
40 > >
41 > > Rgds
42 >
43 > Actually I had never changed the CPUs freq/governor states, and they
44 > were set to 800MHz/userspace.
45 > After I changed their state using gnome applet, and from then on, the
46 > two CPUs' bogomips values where equal.
47 > For governor set to performance here they are:
48 > #cat /proc/cpuinfo |grep -E 'proc|MHz|bogomips'
49 > processor : 0
50 > cpu MHz : 1800.000
51 > bogomips : 8125.24
52 > processor : 1
53 > cpu MHz : 1800.000
54 > bogomips : 8125.24
55 >
56 > However, if I boot into M$ windblows (dual boot system), then boot into
57 > linux without touching the CPUs' freq/gov state the MHz/bogomips values
58 > are changed back to:
59 > processor : 0
60 > cpu MHz : 800.000
61 > bogomips : 3611.94
62 > processor : 1
63 > cpu MHz : 800.000
64 > bogomips : 1603.39
65 >
66 > The 800 MHz is because I have compiled with
67 > CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
68 > CONFIG_CPU_FREQ_GOV_USERSPACE=y
69 >
70 >
71 > --
72 > gentoo-amd64@g.o mailing list
73 >
74 >
75
76
77 --
78 beso
79
80 d-_-b