Changes between Version 19 and Version 20 of Commentary/Profiling


Ignore:
Timestamp:
May 19, 2014 10:32:57 AM (12 months ago)
Author:
osa1
Comment:

replaced -auto-all with -fprof-auto

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  • Commentary/Profiling

    v19 v20  
    1515 * Modifications to optimization behavior in [[GhcFile(compiler/coreSyn/CoreUtils.lhs)]] and [[GhcFile(compiler/coreSyn/CorePrep.lhs)]] to prevent optimizations which would result in misleading profile information. Most of this is to handle the fact that SCCs also count entries (tickishCounts, also applies to [wiki:Commentary/Hpc]); otherwise the only relevant optimization is avoiding floating expressions out of SCCs. Note that the simplifier also has "ticks" (so it can decide when to stop optimizing); these are not the same thing at all. 
    1616 * The {{{StgSCC}}} constructor in STG, and code generation for it [[GhcFile(compiler/codeGen/StgCmmProf.hs)]] 
    17  * A pass over STG in [[GhcFile(compiler/profiling/SCCfinal.lhs)]] to collect cost centres so that they can be statically declared by [[GhcFile(compiler/profiling/ProfInit.hs)]], and add extra SCCs in the case of {{{-auto-all}}}; see also [[GhcFile(compiler/profiling/NOTES)]] 
     17 * A pass over STG in [[GhcFile(compiler/profiling/SCCfinal.lhs)]] to collect cost centres so that they can be statically declared by [[GhcFile(compiler/profiling/ProfInit.hs)]], and add extra SCCs in the case of {{{-fprof-auto}}}; see also [[GhcFile(compiler/profiling/NOTES)]] 
    1818 * Code-generation for setting labels found in [[GhcFile(compiler/codeGen/StgCmmProf.hs)]], in particular saving and restoring CC labels and well as counting ticks; note that cost-centres even get their own constructor in C-- as CC_Labels (cost-centre labels). 
    1919 * Runtime support for initializing and manipulating the actual runtime {{{CostCentre}}} structs which store information, in [[GhcFile(rts/Profiling.c)]]; headers are located in [[GhcFile(includes/rts/prof/CCS.h)]]