SHMEM_GET32_NBI(3)

💖 SHMEM_GET32_NBI 💖

Okay so bestie, welcome to the SHMEM_GET32_NBI(3) page from the Open MPI manual — section 3, library calls, the good stuff ✨. And it's not just one (1) function, it's a whole squad:

• 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 the whole group's deal? 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 it. That's the thesis. 🎀

---

🌸 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)

copied character for character, no cap, don't come for me 💅

🦋 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)

---

💜 DESCRIPTION 💜

So here's the tea, bestie 🍓: 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. They return after posting the operation — like, they hand off the task and skate off immediately, main character energy 🏃‍♀️✨. 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. Periodt.

🎀 The arguments 🎀

• dest — Local data object to be updated. She's the one getting a glow-up 💅
• source — Data object on the PE identified by pe that contains the data to be copied. This data object must be remotely accessible. Don't forget that part, it matters!!
• 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.

🌈 Fortran besties listen up: 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). No funny business with sizes, okay? 😤

---

⭐ NOTES ⭐

See intro_shmem(3) for a definition of the term remotely accessible. Yep, that's the whole note. Short and iconic 👑

---

🔥 EXAMPLES 🔥

Picture this: a simple example, in Fortran 💖

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, bestie:

• intro_shmem(3)
• shmem_quiet(3)

---

💌 one last thing 💌

Copyright belongs to 2003-2026, The Open MPI Community — and this page is dated Sep 10, 2026, straight from the Open MPI distribution. That's a wrap, slay, go get that data, and remember to shmem_quiet before you trust it 🫶✨💖