[CentOS] Re: DDR2 compile times (was Re: segfaults with 8 gig of
ssilva at sgvwater.com
Thu Mar 29 17:45:54 UTC 2007
tblader spake the following on 3/29/2007 6:19 AM:
> Hello All.
> Below are some compile times for 2.6.20 on an fx-62
> running Centos64 with various 2 gig sticks of
> dual channel ram (See previous posts with subject
> of 'segfaults with 8gig of ram' for more details.)
> It seems dual channel will compile a kernel faster,
> but only gained around 30 seconds over 20 minutes.
> Below are the shortest/longest compile times of
> several compiles done over the weekend.
> Compile consisted of make menuconfig (save .config)
> time make dep clean bzImage modules
> 2 sticks dual channel @800mhz
> 10 samples
> real 791.46
> user 664.10
> sys 93.85
> real 799.88
> user 665.30
> sys 93.87
> 4 sticks dual channel @400mhz
> 5 samples (before it hurled booting)
> real 876.19
> user 712.98
> sys 116.18
> real 846.06
> user 710.16
> sys 115.42
> 3 sticks single channel @800mhz
> 6 samples
> real 815.74
> user 673.73
> sys 108.30
> real 822.95
> user 674.32
> sys 108.62
Dual channel at 400Mhz and single channel at 800mhz... Single channel at twice
the speed would be pretty close to equal. Now if you did dual channel at
800mhz you might see a difference.
Try a test with 2 sticks so you can get back to dual channel, put the memory
back up to its SPD detected speed and test that.
shows the tested memory with that board.
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