sc::MPIMessageGrp(3)

💖 NAME 💖

sc::MPIMessageGrp is a concrete implementation of MessageGrp that uses the MPI 1 library — yes bestie, it's giving parallel-communication main character energy. 💅✨ This is the sc::MPIMessageGrp(3) page, btw.

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✨ SYNOPSIS ✨

#include <messmpi.h>

Inherits sc::MessageGrp.

🫶 Public Member Functions

• MPIMessageGrp (MPI_Comm comm) — Use an MPI communicator to create a MessageGrp. The comm argument could be a subset of MPI_COMM_WORLD, for example.
• MPIMessageGrp (int *argc, char ***argv) — Use argc and argv to create a MPIMessageGrp.
• MPIMessageGrp (const Ref< KeyVal > &) — Construction MPIMessageGrp given a KeyVal input object.
• Ref< MessageGrp > clone (void) — Clones (dups) an MPIMessageGrp from MPI_COMM_WORLD. Periodt. 👑
• void raw_send (int target, const void *data, int nbyte)
• void raw_recv (int sender, void *data, int nbyte)
• void raw_sendt (int target, int type, const void *data, int nbyte)
• void raw_recvt (int type, void *data, int nbyte)
• int probet (int type) — Ask if a given typed message has been received. 👀
• void sync () — Synchronize all of the processors. Group-hug energy fr fr. 🫶
• void sum (double *, int n, double *scratch=0, int target=-1)
• void sum (int *, int n, int *scratch=0, int target=-1)
• void reduce (double *, int n, GrpReduce< double > &, double *scratch=0, int target=-1)
• void reduce (unsigned int *, int n, GrpReduce< unsigned int > &, unsigned int *scratch=0, int target=-1)
• void reduce (int *, int n, GrpReduce< int > &, int *scratch=0, int target=-1)
• void reduce (char *, int n, GrpReduce< char > &, char *scratch=0, int target=-1)
• void reduce (unsigned char *, int n, GrpReduce< unsigned char > &, unsigned char *scratch=0, int target=-1)
• void reduce (signed char *, int n, GrpReduce< signed char > &, signed char *scratch=0, int target=-1)
• void reduce (short *, int n, GrpReduce< short > &, short *scratch=0, int target=-1)
• void reduce (float *, int n, GrpReduce< float > &, float *scratch=0, int target=-1)
• void reduce (long *, int n, GrpReduce< long > &, long *scratch=0, int target=-1)
• void raw_bcast (void *data, int nbyte, int from)

🛡️ Protected Member Functions

• void init (MPI_Comm comm, int *argc=0, char ***argv=0) — Not thread-safe due to race condition on nmpi_grps variable.

⚠️ Thread-safety tea: init(...) is not thread-safe because of a race condition on the nmpi_grps variable. Do not @ me, that's literally what the page says. 💀

🎀 Protected Attributes

• void * buf
• int bufsize
• int rnode
• int rtag
• int rlen
• bool use_messagegrp_collectives_ — If true use the generic collective routines in the base class.
• Ref< ThreadGrp > threadgrp
• MPI_Comm commgrp — Currently each commgrp is a dup of MPI_COMM_WORLD.

🌸 Static Protected Attributes

• static int nmpi_grps — Number of MPIMessageGrp's currently in use.
• static Ref< ThreadLock > grplock — lock to access nmpi_grps variable

🦋 Additional Inherited Members

Yep, there are additional inherited members from sc::MessageGrp — the original page puts this heading right here, and we are respecting the vibe check. ✨

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🌈 Detailed Description

The MPIMessageGrp class is a concrete implementation of MessageGrp that uses the MPI 1 library. That's the whole plot, bestie. 🎀

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🧚 Constructor & Destructor Documentation

sc::MPIMessageGrp::MPIMessageGrp (MPI_Comm comm)

Use an MPI communicator to create a MessageGrp. The comm argument could be a subset of MPI_COMM_WORLD, for example. Slay. 💅

sc::MPIMessageGrp::MPIMessageGrp (int * argc, char *** argv)

Use argc and argv to create a MPIMessageGrp. This would have to be used for implementations of MPI that have MPI_Init fill in argc and argv. No cap. 🌟

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🔥 Member Function Documentation

void sc::MPIMessageGrp::reduce (double *, int n, GrpReduce< double > &, double * scratch = 0, int target = -1) [virtual]

Global generic reduction. Similar members exist for each of the basic types.

Reimplemented from sc::MessageGrp.

void sc::MPIMessageGrp::sum (double * data, int n, double * = 0, int target = -1) [virtual]

Global sum reduction. Similar members exist for each of the basic types.

Reimplemented from sc::MessageGrp.

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👑 Author

Generated automatically by Doxygen for MPQC from the source code.

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okay bestie, that's the whole page 💖 — it's from MPQC version 2.3.1, dated Sun Oct 4 2020. slay, you made it to the end. 🎀✨