On 9 August 2017 at 17:52, Antoine Pitrou wrote:
> On Wed, 9 Aug 2017 13:36:28 +1000
> Nick Coghlan wrote:
>> On 8 August 2017 at 10:12, Gregory P. Smith wrote:
>> > I don't know whether it is beneficial or not - but having the
2017-08-09 11:22 GMT+02:00 Antoine Pitrou :
> What are the reasons it is ignored? IIRC some compilers have buggy LTO
> support and it can lead to crashes during compilation.
Issues with LTO:
http://bugs.python.org/issue28032
http://bugs.python.org/issue28605
But since
On Wed, 9 Aug 2017 11:16:36 +0200
Victor Stinner wrote:
> There is already a ./configure --with-lto flag, why not using it?
>
> I'm using --with-lto without PGO for months, I never noticed that the
> option is fully ignored!
What are the reasons it is ignored? IIRC
There is already a ./configure --with-lto flag, why not using it?
I'm using --with-lto without PGO for months, I never noticed that the
option is fully ignored!
Victor
2017-08-09 9:52 GMT+02:00 Antoine Pitrou :
> On Wed, 9 Aug 2017 13:36:28 +1000
> Nick Coghlan
On Wed, 9 Aug 2017 13:36:28 +1000
Nick Coghlan wrote:
> On 8 August 2017 at 10:12, Gregory P. Smith wrote:
> > I don't know whether it is beneficial or not - but having the capability to
> > build LTO without PGO seems reasonable. I can review any pull
On 8 August 2017 at 10:12, Gregory P. Smith wrote:
> I don't know whether it is beneficial or not - but having the capability to
> build LTO without PGO seems reasonable. I can review any pull requests
> altering configure.ac and Makefile.pre.in to make such a change.
Being able
com>; Wang, Peter Xihong
<peter.xihong.w...@intel.com>; Victor Stinner <victor.stin...@gmail.com>
Cc: Python-Dev@python.org
Subject: Re: [Python-Dev] first post introduction and question regarding lto
I don't know whether it is beneficial or not - but having the capability to
bui
sage-
> From: Wang, Peter Xihong
> Sent: Monday, August 7, 2017 5:00 PM
> To: Victor Stinner <victor.stin...@gmail.com>; Soldea, Octavian <
> octavian.sol...@intel.com>
> Cc: Python-Dev@python.org
> Subject: RE: [Python-Dev] first post introduction and question regarding
Stinner <victor.stin...@gmail.com>; Soldea, Octavian
<octavian.sol...@intel.com>
Cc: Python-Dev@python.org
Subject: RE: [Python-Dev] first post introduction and question regarding lto
We evaluated different tests before setting down and proposing regrtest suite
for PGO training, inc
] On Behalf Of
Victor Stinner
Sent: Monday, August 07, 2017 4:43 PM
To: Soldea, Octavian <octavian.sol...@intel.com>
Cc: Python-Dev@python.org
Subject: Re: [Python-Dev] first post introduction and question regarding lto
I don't think that PGO compilation itself is slow. Basically, I expect that it
t; From: Gregory P. Smith [mailto:g...@krypto.org]
> Sent: Monday, August 7, 2017 3:12 PM
> To: Soldea, Octavian <octavian.sol...@intel.com>; Python-Dev@python.org
> Subject: Re: [Python-Dev] first post introduction and question regarding lto
>
>
>
> I've personally never seen a s
on.org
Subject: Re: [Python-Dev] first post introduction and question regarding lto
I've personally never seen a situation where PGO is not desired yet some other
fancier optimization such as LTO is. When do you encounter people wanting that?
PGO always produces a 10-20% faster CPython interpreter.
I've personally never seen a situation where PGO is not desired yet some
other fancier optimization such as LTO is. When do you encounter people
wanting that? PGO always produces a 10-20% faster CPython interpreter.
I have no problem with patches enabling an LTO only build for anyone who
wants
Hello
This is my first post after I just have subscribed to the Python-Dev mailing
list. In this context, the welcome confirmation message suggested to introduce
myself.
My name is Octavian Soldea and I am with the Python optimization team in DSLOT
group in Intel, Santa Clara, California. In
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