Changes by Alecsandru Patrascu :
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resolution: fixed ->
status: closed -> open
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Alecsandru Patrascu added the comment:
I've added a fix for the PGO builds after the issue pointed out by you. Can you
please test it also?
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New submission from Alecsandru Patrascu:
Hello,
This is Alecsandru from the Dynamic Scripting Languages Optimization Team at
Intel Corporation. I would like to submit a patch as a response to the
discussion thread opened in Python-Dev
(https://mail.python.org/pipermail/python-dev/2016
Changes by Alecsandru Patrascu :
Added file: http://bugs.python.org/file41919/cpython3_pgo_default-v02.patch
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Changes by Alecsandru Patrascu :
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Changes by Alecsandru Patrascu :
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Alecsandru Patrascu added the comment:
I've added the patch here also.
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keywords: +patch
Added file: http://bugs.python.org/file41999/pgofix-cpython2.patch
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Changes by Alecsandru Patrascu :
Added file: http://bugs.python.org/file42000/pgofix-cpython3.patch
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Changes by Alecsandru Patrascu :
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nosy: +brett.cannon, gregory.p.smith, lemburg, pitrou, r.david.murray, scoder,
skrah, steve.dower, zach.ware
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Changes by Alecsandru Patrascu :
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nosy: +gregory.p.smith, lemburg, scoder, steve.dower, zach.ware
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Alecsandru Patrascu added the comment:
Yes, you can use LTO without PGO, but the proposed ways it's more efficient and
makes more sense for CPython builds.
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Alecsandru Patrascu added the comment:
I understand now your question. LTO is not enabled when running just `make`,
only in `make profile-opt`
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Alecsandru Patrascu added the comment:
>From our experience, pybench only is not a representative benchmark. Instead,
>if you like to measure performance close to real workloads, you can run the
>Grand Unified Python Benchmark suite, that is more complete.
Also, you need to
Alecsandru Patrascu added the comment:
You are doing measurements on a virtual machine... For sure you are not the
only user that has active workloads on the physical machine while you do
benchmarks :)
On the other hand, the path you are going with just LTO is nice for
experiments, but for
Alecsandru Patrascu added the comment:
Hello Victor,
Indeed, the best outcome is to have PGO, LTO, etc enabled by default when
running ./configure && make, for production level. I also feel that they should
be on by default, if only developers would use the debug version.
Do you th
Alecsandru Patrascu added the comment:
Maybe that end users are lazy and want to type just `make` and let things
happen magically behind the scenes :-)
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Alecsandru Patrascu added the comment:
@Stefan and @Marc, you say that people don't want to wait for PGO to build when
running ./configure && make, but why? Even though many developers use it, this
mode is not intended for development, it is production level and should be run
onc
Alecsandru Patrascu added the comment:
Maybe an workflow like the one proposed in issue #26359 can be helpful in these
development phases.
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Alecsandru Patrascu added the comment:
That sounds like a good idea and plan, to have everything enabled with just one
dedicated configure flag.
I can work on this and post the patches as soon as they are done.
Thank you
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Alecsandru Patrascu added the comment:
I will investigate this and submit a fix. At a first glance, it seems the test
is failing because it does not have the knowledge of the LTO flags.
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Alecsandru Patrascu added the comment:
I will investigate this issue to understand what is happening there and submit
a fix. Thank you for pointing out the exact OS and toolchain used.
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Alecsandru Patrascu added the comment:
Hello,
You can find a patch for this issue attached. Basically, since LTO needs LD
flags when used, I modified the makefile template file and the test to push the
flags up to the sysconfig module.
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keywords: +patch
Added file: http
Alecsandru Patrascu added the comment:
This patch is for CPython 3, and if it looks good I will post also the CPython
2 version.
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Alecsandru Patrascu added the comment:
I uploaded a patch that skips these tests if optimizations are available.
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keywords: +patch
Added file: http://bugs.python.org/file42574/issue26788.patch
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Alecsandru Patrascu added the comment:
I've added the --with-optimizations option to configure, for CPython3 only at
this point. If it looks good I'll create a version also for CPython2.
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Added file:
http://bugs.python.org/file42576/cpython3_with_optimizations
Changes by Alecsandru Patrascu :
Added file:
http://bugs.python.org/file42871/cpython2_with_optimizations_v01.patch
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Changes by Alecsandru Patrascu :
Added file:
http://bugs.python.org/file42872/cpython3_with_optimizations_v02.patch
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Alecsandru Patrascu added the comment:
I've attached a cleaner version for CPython 3 and one for CPython 2. The
problem with CPython 2 is that Gregory did not yet merged the LTO on this
branch (#25702), but as soon as he does it, I'll post updated patches.
Regards,
Alecsandru Patrascu added the comment:
Brett, I tried to add you in the "assigned to", but I do not have any rights to
update those :(
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