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GODhack
Guru
Joined: 26 Jan 2008
Posts: 389
Location: Lithuania
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 Posted: Sun Apr 27, 2008 6:40 pm Post subject: dual-core VS quad-core on Gentoo !? |
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Is there any real advantage of quard (4) core CPU now in Gentoo?
Is it better than dual-core?
Or maybe at all that multicore stuff is useless? Just power consumption for nothing?
Please do not talk about the latest games here. Just Gentoo desktop system and Linux kernel. |
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StringCheesian
l33t
Joined: 21 Oct 2003
Posts: 887
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| Posted: Sun Apr 27, 2008 7:43 pm Post subject: |
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For a non-gaming Gentoo desktop system on Linux, the advantages of 4 cores over 2 are the same as with a non-gaming Windows machine. It depends on use. Will you be encoding video? Will you run multiple CPU-intensive tasks?
Assuming you'll be emerge'ing packages normally, such that they are compiled with gcc: Quad core vs similarly priced (and therefore higher clocked) dual core is an interesting question. |
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SeaTiger
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Joined: 22 Nov 2007
Posts: 603
Location: Toronto, Ontario, Canada
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| Posted: Sun Apr 27, 2008 7:48 pm Post subject: |
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| I have a Q6600 (the cheapest quad from Intel) and it is super fast in compiling ... well, as long as the package support parallel compiling, I have to set -j17 to max out the cpu during compilation. |
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SiberianSniper
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Joined: 06 Apr 2006
Posts: 378
Location: Dayton, OH, USA
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| Posted: Sun Apr 27, 2008 8:11 pm Post subject: |
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I too have a Q6600 and while the individual core speed might not be as high as on some of the C2D processors, it's better for compiling. And in gentoo, there's a lot of compiling.....
But it's also pretty good for gaming, provided you have a somewhat recent video card.
I guess it just depends on what you plan on doing the most of. If you do a lot of heavy multitasking, the C2Q might be a better option. Plus, it's pretty cheap now. |
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phsdv
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Joined: 13 Mar 2005
Posts: 372
Location: Europe
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| Posted: Wed Apr 30, 2008 9:23 am Post subject: |
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Compiling can be much faster on a quad core. I managed to compile openoffice in 45 minutes for example. The kernel in just over 1 minute. Also video rendering uses all 4 cores. So I am happy with my Q6600.
| junksiu wrote: | | I have to set -j17 to max out the cpu during compilation. |
I have done some testing and found that make -j5 is faster than make -j8. (testing was done by compiling the kernel) So no need to increase -j flag to more than #cores+1 |
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ganderatc
n00b
Joined: 01 Feb 2006
Posts: 21
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| Posted: Wed Apr 30, 2008 4:21 pm Post subject: |
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| IIRC, doesn't the kernel force -j1? |
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bunder
Bodhisattva
Joined: 10 Apr 2004
Posts: 5934
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| Posted: Wed Apr 30, 2008 4:42 pm Post subject: |
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| ganderatc wrote: | | IIRC, doesn't the kernel force -j1? |
make CC="distcc" -j4
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| Neddyseagoon wrote: | | The problem with leaving is that you can only do it once and it reduces your influence. |
banned from #gentoo since sept 2017 |
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d2_racing
Bodhisattva
Joined: 25 Apr 2005
Posts: 13047
Location: Ste-Foy,Canada
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| Posted: Wed Apr 30, 2008 5:21 pm Post subject: |
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| phsdv wrote: | | So no need to increase -j flag to more than #cores+1 |
In fact, this formule is the right one, there no need to increase the -j to value belong the number of cores. |
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pilla
Bodhisattva
Joined: 07 Aug 2002
Posts: 7729
Location: Underworld
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| Posted: Wed Apr 30, 2008 6:37 pm Post subject: |
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Moved from Other Things Gentoo to Gentoo Chat.
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"I'm just very selective about the reality I choose to accept." -- Calvin |
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neuron
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Joined: 28 May 2002
Posts: 2371
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