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| author |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2013-03-14 17:26:20 +0000 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2013-03-18 21:26:06 +0000 |
| commit | 556dee0c4d6d8a87c0cddbd2f60fe5917d009f18 (patch) | |
| tree | 0392d47555698777c94dda9a02fe1208e192f06d /meta/classes/base.bbclass | |
| parent | e0705e4801a9855a4289d18e653c35190021206e (diff) | |
| download | openembedded-core-556dee0c4d6d8a87c0cddbd2f60fe5917d009f18.tar.gz | |
package: Add cachedpath optimisation
Currently, various standard library operations like os.walk(),
os.path.isdir() and os.path.islink() each call stat or lstat which
involves a syscall into the kernel. There is no caching since they could
conceivably have changed on disk. The result is that for something like
the do_package task of the kernel we're spending over two minutes making
868,000 individual stat calls for 23,000 files. This is suboptimal.
This patch adds lib/oe/cachedpath.py which are a set of replacement
functions for these operations which use cached stat data rather than
hitting the kernel each time. It gives a nice performance improvement
halving the build time of the kernel do_package.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes/base.bbclass')
| -rw-r--r-- | meta/classes/base.bbclass | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass index 4ec1eda6bc..5fe9a84efe 100644 --- a/meta/classes/base.bbclass +++ b/meta/classes/base.bbclass @@ -10,7 +10,7 @@ inherit utility-tasks inherit metadata_scm inherit logging -OE_IMPORTS += "os sys time oe.path oe.utils oe.data oe.package oe.packagegroup oe.sstatesig oe.lsb" +OE_IMPORTS += "os sys time oe.path oe.utils oe.data oe.package oe.packagegroup oe.sstatesig oe.lsb oe.cachedpath" OE_IMPORTS[type] = "list" def oe_import(d): |