[Openmp-dev] counts in the work sharing

[Churbanov, Andrey via Openmp-dev]

For static schedule the runtime does not track iterations.  The __kmpc_for_static_init_4 (or similar, depending on the iteration variable type) is the only runtime call for a statically scheduled loop (not counting leading barrier if any). After it compiler just loops over obtained range of iterations without involving runtime any more.

Regards,
Andrey

From: Openmp-dev <openmp-dev-bounces at lists.llvm.org> On Behalf Of Abid Malik via Openmp-dev
Sent: Friday, March 13, 2020 9:35 PM
To: openmp-dev at lists.llvm.org
Subject: [Openmp-dev] counts in the work sharing

Hello,

I am looking into the void __kmp_for_static_init4 function which marks the start work sharing. The function computes the upper and lower bounds and stride to be used for the set of iterations to be executed by the current thread from the statically scheduled loop that is described by the initial values of the bround, stride, increment and chunk size.  How the record of iterations is kept. Which function/file should I look into to keep track of the iteration?


Thanks,

--
Abid M. Malik
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"I have learned silence from the talkative, toleration from the intolerant, and kindness from the unkind"---Gibran
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