similar to: [LLVMdev] profile guided optimizations

On Jun 18, 2013, at 2:48 PM, Eric Christopher <echristo at gmail.com> wrote: > On Tue, Jun 18, 2013 at 11:19 AM, Bob Wilson <bob.wilson at apple.com> wrote: >> >> On Jun 17, 2013, at 6:54 AM, Diego Novillo <dnovillo at google.com> wrote: >> >>> On 2013-06-15 14:18 , Evan Cheng wrote: >>>> Apple folks are also gearing up to push on the

On Tue, Jun 18, 2013 at 11:19 AM, Bob Wilson <bob.wilson at apple.com> wrote: > > On Jun 17, 2013, at 6:54 AM, Diego Novillo <dnovillo at google.com> wrote: > >> On 2013-06-15 14:18 , Evan Cheng wrote: >>> Apple folks are also gearing up to push on the PGO front. We are primarily interested in using instrumentation, rather than sampling, to collect profile info.

Hi! My name is Gratian and I would like to participate to GSOC 2011. I'm interested in profile-guided optimizations, and I want to implement two optimizations that can bring tangible benefits for most applications: profile-guided function inlining and basic block positioning. Inlining can be greatly improved if we take into consideration how many times the function we want to inline was

Hi I have one question on LLVM 3.3 profile guided optimizations. I see in the utils/profile.pl there are supports for "-insert-block-profiling", "-insert-edge-profiling" and "-insert-function-profiling", but it seems only -insert-edge-profiling is working and the other 2 gets suggested to "-insert-gcov-profiling". and llvm_start_basic_block_tracing does

Hi, I would like to learn the details regarding what exactly PGO does for basic block layout/code placement optimizations in llvm. Could you please point me to some descriptions? Is it close to this paper (Karl Pettis and Robert C. Hansen. 1990. Profile guided code positioning. PLDI'90) http://perso.ensta-paristech.fr/~bmonsuez/Cours/B6-4/Articles/papers15.pdf? Whether it is purely

On Jun 17, 2013, at 6:54 AM, Diego Novillo <dnovillo at google.com> wrote: > On 2013-06-15 14:18 , Evan Cheng wrote: >> Apple folks are also gearing up to push on the PGO front. We are primarily interested in using instrumentation, rather than sampling, to collect profile info. However, I suspect the way profile ended up being used in the various optimization and codegen passes

On 2013-06-15 14:18 , Evan Cheng wrote: > Apple folks are also gearing up to push on the PGO front. We are > primarily interested in using instrumentation, rather than sampling, > to collect profile info. However, I suspect the way profile ended up > being used in the various optimization and codegen passes would be > largely similar. > Excellent! We are initially

Apple folks are also gearing up to push on the PGO front. We are primarily interested in using instrumentation, rather than sampling, to collect profile info. However, I suspect the way profile ended up being used in the various optimization and codegen passes would be largely similar. There is also some interests in pursuing profile directed specialization. But that can wait. I think it makes

hello,everyone recently, I analyze the compiler optimization level, so I have searched the usage of profile-guided optimization of LLVM, but little result in google, therefore, could you please list detailed usage of profile-guided optimization? LLVM must be install with flags '--enable-profile'? A example will be pleasure. thanks von -------------- next part -------------- An HTML

Hi all, I would like to know the status of profile-guided optimization. What enhancements could be done to the current implementation? The ideas for profile-guided transformations from [0] are still available? Many thanks. Gener [0] http://llvm.org/OpenProjects.html#profileguided -------------- next part -------------- An HTML attachment was scrubbed... URL:

> > After the basic profile-based transformations are working, I would like to > add new sources of profile. Mainly, I am thinking of implementing Auto > FDO. > For those who are not familiar with what autoFDO is -- Auto FDO is originally called Sample Based FDO. Its main author is Dehao Chen @google, and Robert Hundt is the one of the main pushers of technology in Google. The

On 2013-06-12 17:23 , Diego Novillo wrote: > > I have started looking at the state of PGO (Profile Guided > Optimization) in LLVM.**I want to discuss my high-level plan and make > sure I'm not missing anything interesting out. I appreciate any > feedback on this, pointers to existing work, patches and anything > related to PGO in LLVM. Good grief. A whole lot of fail

I hope you don't mind if do have a follow up question- is code in place in the code generation supporting "proper" scheduling via the processor itineraries in LLVM? On Fri, Oct 28, 2011 at 8:47 PM, Carter Cheng <cartercheng at gmail.com> wrote: > Thanks Hal. > > On Fri, Oct 28, 2011 at 2:19 AM, Hal Finkel <hfinkel at anl.gov> wrote: > >> Carter,

1. Summary I will implement two optimizations in the LLVM compiler, both based on runtime profile information: an inlining mechanism that takes the call frequency into consideration, and a better basic block placement algorithm. 2. The project LLVM now includes an efficient framework [1] for instrumenting an application and collecting edge and path profile information. Profile-guided

Thanks Hal. On Fri, Oct 28, 2011 at 2:19 AM, Hal Finkel <hfinkel at anl.gov> wrote: > Carter, > > In my opinion (and I was the one who committed the changes in question), > it depends on the hardware. The pipeline descriptions are for the PPC > 440, which is an embedded PPC chip use in a variety of places. As such, > it is a fairly specific target, and using

Dear LLVM community, I am very happy to become a member of this great community. At the German Climate Research Center (DKRZ) I am a PhD student and write my thesis in python. The general topic is Compiler Optimization in High Performance Computing. My use cases are climate models, written in C/C++. In Frankfurt I am working at a HPC Cluster Center and my duties are to monitor and to optimize

I have started looking at the state of PGO (Profile Guided Optimization) in LLVM.**I want to discuss my high-level plan and make sure I'm not missing anything interesting out. I appreciate any feedback on this, pointers to existing work, patches and anything related to PGO in LLVM. I will be keeping changes to this plan in this web document

On Jun 12, 2013, at 2:23 PM, Diego Novillo <dnovillo at google.com> wrote: > In terms of optimizations, our (Google) experience is that > inlining is the key beneficiary of profile information. > Particularly, in big C++ applications. I expect to focus most > of my attention on the inliner. That sounds plausible to me. It seems like we might need a way of representing call

Hi, sorry to be so late with my answer, I was busy finishing my master thesis. On 03/21/2010 11:06 PM, Gener Omer wrote: > > I have finally started my project which is supposed to implement some > algorithms that uses profile information in order to optimize programs. > I have a very basic question for you. I have a very simple source code, > I compiled it with LLVM > >

Thanks for the help. I have a couple follow up questions- Where can I find the code which calculates the properties of inline asm nodes and examples of passes that make use of this information? Thanks again, Carter. On Mon, Nov 5, 2018 at 12:04 AM David Blaikie <dblaikie at gmail.com> wrote: > > > On Sun, Nov 4, 2018 at 1:56 AM Carter Cheng via llvm-dev < > llvm-dev at