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bitbake: siggen: Split get_tashhash for performance

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There are two operations happening in get_taskhash, the building of the
underlying data and the calculation of the hash.

Split these into two funtions since the preparation part doesn't need
to rerun when unihash changes, only the calculation does.

This split allows sigificant performance improvements for hashequiv
in builds where many hashes are equivalent and many hashes are changing.

(Bitbake rev: 6a32af2808d748819f4af55c443578c8a63062b3)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie
2019-12-13 16:07:28 +00:00
parent 73896a7a0e
commit 884463c8d1
2 changed files with 25 additions and 9 deletions
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bitbake/lib/bb/runqueue.py
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@@ -1185,6 +1185,7 @@ class RunQueueData:
procdep = []
for dep in self.runtaskentries[tid].depends:
procdep.append(dep)
bb.parse.siggen.prep_taskhash(tid, procdep, self.dataCaches[mc_from_tid(tid)])
self.runtaskentries[tid].hash = bb.parse.siggen.get_taskhash(tid, procdep, self.dataCaches[mc_from_tid(tid)])
self.runtaskentries[tid].unihash = bb.parse.siggen.get_unihash(tid)