pipecg_aux.hip

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/*
 Copyright (c) 2021-2022, The Neko Authors
 All rights reserved.
 
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     with the distribution.
 
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     from this software without specific prior written permission.
 
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#include <hip/hip_runtime.h>
#include <device/device_config.h>
#include <device/hip/check.h>
#include "pipecg_kernel.h"
 
real *buf = NULL;
real *buf_d1 = NULL;
real *buf_d2 = NULL;
real *buf_d3 = NULL;
int buf_len = 0;
 
extern "C" {
  
  void hip_cg_update_xp(void *x, void *p, void *u, void *alpha, void *beta,
                        int *p_cur, int *p_space, int *n) {
        
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(((*n) + 1024 - 1) / 1024, 1, 1);
    
    hipLaunchKernelGGL(HIP_KERNEL_NAME(cg_update_xp_kernel<real>),
                       nblcks, nthrds, 0, (hipStream_t) glb_cmd_queue,
                       (real *) x, (real *) p, (real **) u, (real *) alpha,
                       (real *) beta, *p_cur, *p_space, *n);
    HIP_CHECK(hipGetLastError());
  }
 
  void hip_pipecg_vecops(void *p, void *q, void *r, void *s, void *u1,
                            void *u2, void *w, void *z, 
                            void *ni, void *mi, real *alpha, 
                            real *beta, void *mult, 
                            real *reduction, int *n) {
        
    const dim3 nthrds(1024, 1, 1);
    const dim3 nblcks(((*n) + 1024 - 1)/ 1024, 1, 1);
    const int nb = ((*n) + 1024 - 1)/ 1024;
    const hipStream_t stream = (hipStream_t) glb_cmd_queue;
 
    if (buf != NULL && buf_len < nb) {
      HIP_CHECK(hipHostFree(buf));
      HIP_CHECK(hipFree(buf_d1));
      HIP_CHECK(hipFree(buf_d2));
      HIP_CHECK(hipFree(buf_d3));
      buf = NULL;
    }
 
    if (buf == NULL){
      HIP_CHECK(hipHostMalloc(&buf, nb*sizeof(real)));
      HIP_CHECK(hipMalloc(&buf_d1, nb*sizeof(real)));
      HIP_CHECK(hipMalloc(&buf_d2, nb*sizeof(real)));
      HIP_CHECK(hipMalloc(&buf_d3, nb*sizeof(real)));
      buf_len = nb;
    }
     
    hipLaunchKernelGGL(HIP_KERNEL_NAME(pipecg_vecops_kernel<real>),
                       nblcks, nthrds, 0, stream,
                       (real *) p, (real *) q, (real *) r, (real *) s,
                       (real *) u1, (real *) u2, (real *) w, (real *) z,
                       (real *) ni, (real *) mi, *alpha, *beta,
                       (real *) mult, buf_d1, buf_d2, buf_d3, *n);
    HIP_CHECK(hipGetLastError());
 
    hipLaunchKernelGGL(HIP_KERNEL_NAME(reduce_kernel<real>),
                       1, 1024, 0 , stream, buf_d1, nb);
    HIP_CHECK(hipGetLastError());
    hipLaunchKernelGGL(HIP_KERNEL_NAME(reduce_kernel<real>),
                       1, 1024, 0 , stream, buf_d2, nb);
    HIP_CHECK(hipGetLastError());
        hipLaunchKernelGGL(HIP_KERNEL_NAME(reduce_kernel<real>),
                       1, 1024, 0 , stream, buf_d3, nb);
    HIP_CHECK(hipGetLastError());
 
    HIP_CHECK(hipMemcpyAsync(&buf[0], buf_d1, sizeof(real),
                             hipMemcpyDeviceToHost, stream));
    HIP_CHECK(hipGetLastError());
    HIP_CHECK(hipMemcpyAsync(&buf[1], buf_d2, sizeof(real),
                             hipMemcpyDeviceToHost, stream));
    HIP_CHECK(hipGetLastError());
    HIP_CHECK(hipMemcpyAsync(&buf[2], buf_d3, sizeof(real),
                             hipMemcpyDeviceToHost, stream));
    HIP_CHECK(hipGetLastError());
 
    HIP_CHECK(hipStreamSynchronize(stream));
        
    reduction[0] = buf[0];
    reduction[1] = buf[1];
    reduction[2] = buf[2];
 
  }
}