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authorRobert Yang <liezhi.yang@windriver.com>2018-11-22 19:51:59 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2018-11-22 12:19:26 +0000
commit8b31c919814b8bdf25b3381053656523c001ae0d (patch)
tree6b37b6be29ae5f6c3c46d4c3f03c20df42fa5c44
parent07b59afd52244410d8d833e6dfe262d952e5e344 (diff)
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sstate.bbclass: set SSTATE_EXTRAPATHWILDCARD explicitly
The glob.glob("/sstate/*/*/") is very time consuming, set SSTATE_EXTRAPATHWILDCARD explicity to avoid that. This can save a lot of time when there are many sstate files. For example, I have more than 600,000 sstate files: * Before - Without disk caches $ time python3 -c 'import glob; glob.glob("/sstate-cache/*/*/sstate:quilt-native:x86_64-linux:0.65:r0:x86_64:3:*_populate_sysroot.tgz*")' real 4m32.583s user 0m5.768s sys 0m12.892s - With disk caches $ time python3 -c 'import glob; glob.glob("/sstate-cache/*/*/sstate:quilt-native:x86_64-linux:0.65:r0:x86_64:3:*_populate_sysroot.tgz*")' real 0m4.111s user 0m2.348s sys 0m1.756s * After $ time python3 -c 'import glob; glob.glob("/sstate-cache.bak/universal/*/sstate:quilt-native:x86_64-linux:0.65:r0:x86_64:3:*_populate_sysroot.tgz*")' - Without disk caches: real 0m7.928s user 0m0.172s sys 0m0.124s - With disk caches: real 0m0.131s user 0m0.088s sys 0m0.044s We can see that it saves about 3.8s with disk caches, and saves about 264s without disk caches. Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/classes/sstate.bbclass2
1 files changed, 1 insertions, 1 deletions
diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index efb0096c70..94fde6d30b 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -101,7 +101,7 @@ python () {
if bb.data.inherits_class('native', d) or bb.data.inherits_class('crosssdk', d) or bb.data.inherits_class('cross', d):
d.setVar('SSTATE_EXTRAPATH', "${NATIVELSBSTRING}/")
d.setVar('BB_HASHFILENAME', "True ${SSTATE_PKGSPEC} ${SSTATE_SWSPEC}")
- d.setVar('SSTATE_EXTRAPATHWILDCARD', "*/")
+ d.setVar('SSTATE_EXTRAPATHWILDCARD', "${NATIVELSBSTRING}/")
unique_tasks = sorted(set((d.getVar('SSTATETASKS') or "").split()))
d.setVar('SSTATETASKS', " ".join(unique_tasks))