From 64e3c3beb3a122fd01837de5195d9734076865e1 Mon Sep 17 00:00:00 2001
From: Neil Gershenfeld <gersh@cba.mit.edu>
Date: Sun, 24 Oct 2021 15:54:43 -0400
Subject: [PATCH] CUDA error check
---
CUDA/cudapi.cu | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/CUDA/cudapi.cu b/CUDA/cudapi.cu
index dd7ac6a..73276a9 100755
--- a/CUDA/cudapi.cu
+++ b/CUDA/cudapi.cu
@@ -28,16 +28,25 @@ void reduce(double *arr) {
uint64_t len = npts >> 1;
while (1) {
reduce_sum<<<blocks,threads>>>(arr,len);
+ cudaCheck("reduce");
len = len >> 1;
if (len == 0)
return;
}
}
+void cudaCheck(string msg) {
+ cudaError err;
+ err = cudaGetLastError();
+ if (cudaSuccess != err)
+ cerr << msg << ": " << cudaGetErrorString(err) << endl;
+ }
int main(void) {
double harr[1],*darr;
cudaMalloc(&darr,npts*sizeof(double));
+ cudaCheck("cudaMalloc");
auto tstart = std::chrono::high_resolution_clock::now();
init<<<blocks,threads>>>(darr,nloop);
+ cudaCheck("init");
reduce(darr);
cudaDeviceSynchronize();
auto tend = std::chrono::high_resolution_clock::now();
--
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