On 08/12/2011 08:19 PM, Lu, Lianhao wrote:
Robert Yang wrote on 2011-08-12:
Hi folks,
The build time of core-image-sato increases about 5 ~ 10 minutes than
the following commit:
commit 5af197b55a4b779f1ec93186f0723026949ba2b5
Author: Liping Ke<[email protected]>
Date: Fri Jun 3 08:22:40 2011 +0800
cache: Implement multiple extra cache fields request support
I think this patch only stores extra information in an extra cache. It only affects the
parsing time, and I don't think there will be 5 min difference. How about comparing the
"bitbake -e" time with and without the patch(by deleting all the cache files
before running bitbake).
I'm sorry that I didn't describe it clearly, what I meant was that: This patch
worked correctly, it didn't increase the build time, but other patches after
this one made the build time increased, we just use this commit as a reference
point.
// Robert
Best Regards,
-Lianhao
On my host,
1) the build time of 5af197b55a4b779f1ec93186f0723026949ba2b5 is:
real 208m26.133s
user 241m29.280s
sys 47m0.630s
2) and: 068839698fe192d8846c0ed4db65861448e8e524 is:
real 217m39.687s
user 255m34.150s
sys 48m21.510s
I use the bisect build method to find out which patch causes the time
increases, but the build time is not stable on my host(Ubuntu 11.04
64bit), e.g., the build time of 1) is 208m at the first build, then
"git co other_commit" and build it, after about 10 builds, then go
back to build 5af197b55a4b779f1ec, the build time will increases about
8 minutes, I have stopped the X and cron, at. This may have relationship with
the linux distribution and disk.
So I have to restart the build, reboot the machine by two days, and go
on the build. It would be better if anyone has other good method.
I think that for the next release(e.g., yocto 1.2), we can find a
clean and stable machine(for the distribution, maybe RHEL is more
stable than Ubuntu) to check the build time weekly, so that we can notice the
performance issue early.
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