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POcudaDeviceReset for multiple gpu's
 

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    <p>I am currently working on a gpu server which has 4 Tesla T10 gpu's. While I keep testing the kernels and have to frequently kill the processes using ctrl-C, I added a few lines to the end of a simple device query code. The code is given below :</p> <pre><code>#include &lt;stdio.h&gt; // Print device properties void printDevProp(cudaDeviceProp devProp) { printf("Major revision number: %d\n", devProp.major); printf("Minor revision number: %d\n", devProp.minor); printf("Name: %s\n", devProp.name); printf("Total global memory: %u\n", devProp.totalGlobalMem); printf("Total shared memory per block: %u\n", devProp.sharedMemPerBlock); printf("Total registers per block: %d\n", devProp.regsPerBlock); printf("Warp size: %d\n", devProp.warpSize); printf("Maximum memory pitch: %u\n", devProp.memPitch); printf("Maximum threads per block: %d\n", devProp.maxThreadsPerBlock); for (int i = 0; i &lt; 3; ++i) printf("Maximum dimension %d of block: %d\n", i, devProp.maxThreadsDim[i]); for (int i = 0; i &lt; 3; ++i) printf("Maximum dimension %d of grid: %d\n", i, devProp.maxGridSize[i]); printf("Clock rate: %d\n", devProp.clockRate); printf("Total constant memory: %u\n", devProp.totalConstMem); printf("Texture alignment: %u\n", devProp.textureAlignment); printf("Concurrent copy and execution: %s\n", (devProp.deviceOverlap ? "Yes" : "No")); printf("Number of multiprocessors: %d\n", devProp.multiProcessorCount); printf("Kernel execution timeout: %s\n", (devProp.kernelExecTimeoutEnabled ? "Yes" : "No")); return; } int main() { // Number of CUDA devices int devCount; cudaGetDeviceCount(&amp;devCount); printf("CUDA Device Query...\n"); printf("There are %d CUDA devices.\n", devCount); // Iterate through devices for (int i = 0; i &lt; devCount; ++i) { // Get device properties printf("\nCUDA Device #%d\n", i); cudaDeviceProp devProp; cudaGetDeviceProperties(&amp;devProp, i); printDevProp(devProp); } printf("\nPress any key to exit..."); char c; scanf("%c", &amp;c); **for (int i = 0; i &lt; devCount; i++) { cudaSetDevice(i); cudaDeviceReset(); }** return 0; } </code></pre> <p>My query is related to the for loop just before the main() ends in which I set each device one by one and then use cudaResetDevice command. I get a strange feeling that this code, although doesnt produce any error but I am not able to reset all the devices. Instead, the program is resetting only the default device i.e device 0 each time. Can anyone tell me what should I do to reset each of the 4 devices.</p> <p>Thanks</p>
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