bitbake: use multiple processes to dump signatures.

This change significantly shortens the time on reparsing stage
of '-S' option.

Each file is reparsed and then dumped within a dedicated
process. The maximum number of the running processes is not
greater than the value of BB_NUMBER_PARSE_THREADS if it is set.

The dump_sigs() in class SignatureGeneratorBasic is _replaced_
by a new dump_sigfn() interface, so calls from the outside and
subclasses are dispatched to the implementation in the base
class of SignatureGeneratorBasic.

Fixes [YOCTO #10352]

(Bitbake rev: 99d3703edd77a21770b366c6ad65a3c0f5183493)

Signed-off-by: Jianxun Zhang <jianxun.zhang@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 4226c80c85..3ceeef1ccc 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -307,8 +307,8 @@ class SignatureGeneratorBasic(SignatureGenerator):
                 pass
             raise err
 
-    def dump_sigs(self, dataCaches, options):
-        for fn in self.taskdeps:
+    def dump_sigfn(self, fn, dataCaches, options):
+        if fn in self.taskdeps:
             for task in self.taskdeps[fn]:
                 tid = fn + ":" + task
                 (mc, _, _) = bb.runqueue.split_tid(tid)