SHMEM_FLOAT_GET_NBI(3)

💖 SHMEM_FLOAT_GET_NBI 💖

okay so this is the Open MPI manpage for shmem_float_get_nbi, and honestly the whole girl-gang is here 🫶 — all the nonblocking get besties share this one page:

• shmem_getmem_nbi(3)
• shmem_char_get_nbi(3)
• shmem_short_get_nbi(3)
• shmem_int_get_nbi(3)
• shmem_long_get_nbi(3)
• shmem_longlong_get_nbi(3)
• shmem_float_get_nbi(3)
• shmem_double_get_nbi(3)
• shmem_longdouble_get_nbi(3)
• shmem_get8_nbi(3)
• shmem_get16_nbi(3)
• shmem_get32_nbi(3)
• shmem_get64_nbi(3)
• shmem_get128_nbi(3)

and what they do is: the nonblocking get routines provide a method for copying data from a contiguous remote data object on the specified PE to the local data object. that's the whole vibe ✨

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✨ SYNOPSIS ✨

🎀 C or C++

#include <mpp/shmem.h>

void shmem_getmem_nbi(void *dest, const void *source,
  size_t nelems, int pe)

void shmem_char_get(char *dest, const char *source,
  size_t nelems, int pe)

void shmem_short_get(short *dest, const short *source,
  size_t nelems, int pe)

void shmem_int_get(int *dest, const int *source,
  size_t nelems, int pe)

void shmem_long_get(long *dest, const long *source,
  size_t nelems, int pe)

void shmem_longlong_get(long long *dest, const long long *source,
  size_t nelems, int pe)

void shmem_float_get(float *dest, const float *source,
  size_t nelems, int pe)

void shmem_double_get(double *dest, const double *source,
  size_t nelems, int pe)

void shmem_longdouble_get(long double *dest, const long double *source,
  size_t nelems, int pe)

void shmem_get8(void *dest, const void *source,
  size_t nelems, int pe)

void shmem_get16(void *dest, const void *source,
  size_t nelems, int pe)

void shmem_get32(void *dest, const void *source,
  size_t nelems, int pe)

void shmem_get64(void *dest, const void *source,
  size_t nelems, int pe)

void shmem_get128(void *dest, const void *source,
  size_t nelems, int pe)

🌸 Fortran

INCLUDE "mpp/shmem.fh"

INTEGER nelems, pe

CALL SHMEM_GETMEM_NBI(dest, source, nelems, pe)

CALL SHMEM_CHARACTER_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_COMPLEX_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_DOUBLE_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_INTEGER_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_LOGICAL_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_REAL_GET_NBI(dest, source, nelems, pe)

CALL SHMEM_GET4_NBI(dest, source, nelems, pe)

CALL SHMEM_GET8_NBI(dest, source, nelems, pe)

CALL SHMEM_GET32_NBI(dest, source, nelems, pe)

CALL SHMEM_GET64_NBI(dest, source, nelems, pe)

CALL SHMEM_GET128_NBI(dest, source, nelems, pe)

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🦋 DESCRIPTION 🦋

so the get routines provide a method for copying a contiguous symmetric data object from a different PE to a contiguous data object on the local PE. 💫 and here's the nonblocking part, and it's the whole point, so listen up bestie: the routines return after posting the operation. the operation is considered complete after a subsequent call to shmem_quiet. at the completion of shmem_quiet, the data has been delivered to the dest array on the local PE. no cap 🫡

the arguments are as follows:

• dest — local data object to be updated. she's the glow-up target 💅
• source — data object on the PE identified by pe that contains the data to be copied. this data object must be remotely accessible. periodt.
• nelems — number of elements in the target and source arrays. len must be of type integer. if you are using Fortran, it must be a constant, variable, or array element of default integer type.
• pe — PE number of the remote PE. pe must be of type integer. if you are using Fortran, it must be a constant, variable, or array element of default integer type.

if you are using Fortran, data types must be of default size 👑 for example, a real variable must be declared as REAL, REAL*4, or REAL(KIND=4).

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📝 NOTES 📝

see intro_shmem(3) for a definition of the term remotely accessible. iykyk 🌈

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🌟 EXAMPLES 🌟

consider this simple example for Fortran. yes bestie, we're doing a reduction, stay with me 🍓

PROGRAM REDUCTION
  REAL VALUES, SUM
  COMMON /C/ VALUES
  REAL WORK

  CALL START_PES(0) ! ALLOW ANY NUMBER OF PES
  VALUES = MY_PE() ! INITIALIZE IT TO SOMETHING
  CALL SHMEM_BARRIER_ALL
  SUM = 0.0
  DO I = 0,NUM_PES()-1
    CALL SHMEM_REAL_GET_NBI(WORK, VALUES, 1, I)
    CALL SHMEM_QUIET                ! wait for delivery
    SUM = SUM + WORK
  ENDDO
  PRINT *, 'PE ', MY_PE(), ' COMPUTED SUM=', SUM
  CALL SHMEM_BARRIER_ALL
END

💜 See also:

intro_shmem(3) shmem_quiet(3)

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💀 reminder that this page says the routine returns right after posting — if you don't call shmem_quiet afterward, the data isn't delivered yet. that's not a suggestion, that's just what it says.

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🎀 Copyright 🎀

Copyright 2003-2026, The Open MPI Community 💖

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okay that's the whole page, bestie, you're officially learned ✨ this was the Open MPI version of SHMEM_FLOAT_GET_NBI(3), dated Sep 10, 2026 — go call it on some PEs and slay 💅🫶🌸