[1/3] Lower sampling rate for autofdo bootstrap

Message ID 20190114081942.9088-1-andi@firstfloor.org
State New
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Series
  • [1/3] Lower sampling rate for autofdo bootstrap
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Commit Message

Andi Kleen Jan. 14, 2019, 8:19 a.m.
From: Andi Kleen <ak@linux.intel.com>


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.
---
 Makefile.in  | 2 +-
 Makefile.tpl | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
2.19.1

Comments

Richard Biener Jan. 14, 2019, 9:06 a.m. | #1
On Mon, Jan 14, 2019 at 9:20 AM Andi Kleen <andi@firstfloor.org> wrote:
>

> From: Andi Kleen <ak@linux.intel.com>

>

> 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.


OK.

Richard.

> gcc/:

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

>

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

>         * Makefile.tpl: Dito.

> ---

>  Makefile.in  | 2 +-

>  Makefile.tpl | 2 +-

>  2 files changed, 2 insertions(+), 2 deletions(-)

>

> diff --git a/Makefile.in b/Makefile.in

> index aa41730528a..28539a45372 100644

> --- a/Makefile.in

> +++ b/Makefile.in

> @@ -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

> diff --git a/Makefile.tpl b/Makefile.tpl

> index 1ab65ac8ec4..126296fb49a 100644

> --- a/Makefile.tpl

> +++ b/Makefile.tpl

> @@ -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

> --

> 2.19.1

>

Patch

diff --git a/Makefile.in b/Makefile.in
index aa41730528a..28539a45372 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -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
diff --git a/Makefile.tpl b/Makefile.tpl
index 1ab65ac8ec4..126296fb49a 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -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