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Lower sampling rate for autofdo bootstrap

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autofdo create_gcov uses a lot of memory for large sample files.
Since gcc runs quite long the sample files generated during
the bootstrap are fairly ig.

Currently I can't even build make autoprofiledbootstrap on my system at
home because create_gcov needs more than 12GB and runs out of memory.

This should probably be fixed in create_gcov, but for now
lowering the sampling rate works well enough for me. The bootstrap
run is long enough that it gets good enough data in any case.

gcc/:
2019-01-14  Andi Kleen  <ak@linux.intel.com>

	* Makefile.in: Lower autofdo sampling rate by 10x.
	* Makefile.tpl: Dito.

From-SVN: r267930
This commit is contained in:
Andi Kleen 2019-01-15 03:49:45 +00:00 committed by Andi Kleen
parent 708efa49eb
commit 6facd01f98
3 changed files with 7 additions and 2 deletions
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2
Makefile.in
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@ -387,7 +387,7 @@ MAKEINFO = @MAKEINFO@
EXPECT = @EXPECT@
RUNTEST = @RUNTEST@
AUTO_PROFILE = gcc-auto-profile -c 1000000
AUTO_PROFILE = gcc-auto-profile -c 10000000
# This just becomes part of the MAKEINFO definition passed down to
# sub-makes. It lets flags be given on the command line while still

2
Makefile.tpl
View File

@ -390,7 +390,7 @@ MAKEINFO = @MAKEINFO@
EXPECT = @EXPECT@
RUNTEST = @RUNTEST@
AUTO_PROFILE = gcc-auto-profile -c 1000000
AUTO_PROFILE = gcc-auto-profile -c 10000000
# This just becomes part of the MAKEINFO definition passed down to
# sub-makes. It lets flags be given on the command line while still

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2019-01-14 Andi Kleen <ak@linux.intel.com>
* Makefile.in: Lower autofdo sampling rate by 10x.
* Makefile.tpl: Dito.
2019-01-14 Tom Honermann <tom@honermann.net>
* defaults.h: Define CHAR8_TYPE.