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2011-02-14
, 10:22
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Posts: 96 |
Thanked: 105 times |
Joined on Aug 2006
@ Finland
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#3
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Maybe some timestamp won't match anymore after logout/login. Use verbose build to se what it's doing.
Maybe even try ccache if that might help recompiles.
Maybe even try ccache if that might help recompiles.
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2011-02-14
, 10:56
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Posts: 2,802 |
Thanked: 4,491 times |
Joined on Nov 2007
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#4
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Ccache is installed and used by default, that's why the second compilation is much faster. I've no idea why logging out of scratchbox makes it longer for the OP though.
| The Following User Says Thank You to lma For This Useful Post: | ||
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2011-02-14
, 11:52
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Posts: 549 |
Thanked: 299 times |
Joined on Jun 2010
@ Australian in the Philippines
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#5
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Do you have a bunch of spare cores in your CPU? I tend to increase the number of jobs to run in parallel based on the number of CPU's and cores I have. Eg.
make -j 4 bzImage
This should speed things along a tad assuming you have a quad core machine, though you can vary the number up or down depending.
make -j 4 bzImage
This should speed things along a tad assuming you have a quad core machine, though you can vary the number up or down depending.
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2011-02-14
, 13:40
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Posts: 302 |
Thanked: 193 times |
Joined on Oct 2008
@ England
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#6
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If it's the same as Gentoo then it's -j total number of cores + 1
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2011-02-27
, 06:53
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Posts: 58 |
Thanked: 8 times |
Joined on Aug 2010
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#7
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Originally Posted by teh
Yes, that is a good way and I have done that.
Get a faster computer?
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2011-02-27
, 06:57
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Posts: 58 |
Thanked: 8 times |
Joined on Aug 2010
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#8
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Originally Posted by dchky
This is a good suggestion, I will try it.
Do you have a bunch of spare cores in your CPU? I tend to increase the number of jobs to run in parallel based on the number of CPU's and cores I have. Eg.
make -j 4 bzImage
This should speed things along a tad assuming you have a quad core machine, though you can vary the number up or down depending.
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2011-02-27
, 07:03
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Posts: 58 |
Thanked: 8 times |
Joined on Aug 2010
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#9
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Originally Posted by onion
I think your answer is most reasonable. Unfortunately I cannot repeat what I mentioned. Now whenever I recompile the kernel under scratchbox(in any case), the compile time is short. I don't know why.
Maybe some timestamp won't match anymore after logout/login. Use verbose build to se what it's doing.
Maybe even try ccache if that might help recompiles.
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2011-02-27
, 11:59
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Posts: 549 |
Thanked: 299 times |
Joined on Jun 2010
@ Australian in the Philippines
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#10
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Originally Posted by Captwheeto
No, it's just -j <Total Number of Cores> only. Not plus 1 :-) You wont see any improvement unfortunately. +2 or more above the number of cores and you're more likely to have compile times take (sometimes significantly) longer.
If it's the same as Gentoo then it's -j total number of cores + 1
But if I quit scratchbox and re-login it again, and re-compile the kernel, the time is as long as the first time I do it. Does anyone know why? And how to solve this problem?
Thanks!