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<title>NVIDIA CUDA Library: Peer Device Memory Access</title>
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<h1>Peer Device Memory Access<br>
<small>
[<a class="el" href="group__CUDART.html">CUDA Runtime API</a>]</small>
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<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__CUDART__TYPES_gf599e5b8b829ce7db0f5216928f6ecb6.html#gf599e5b8b829ce7db0f5216928f6ecb6">cudaError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CUDART__PEER_gbc095a10a4d953e972ef918997c5e567.html#gbc095a10a4d953e972ef918997c5e567">cudaDeviceCanAccessPeer</a> (int *canAccessPeer, int device, int peerDevice)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Queries if a device may directly access a peer device's memory. <a href="#gbc095a10a4d953e972ef918997c5e567"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__CUDART__TYPES_gf599e5b8b829ce7db0f5216928f6ecb6.html#gf599e5b8b829ce7db0f5216928f6ecb6">cudaError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CUDART__PEER_gae24fc50bd0f1ce7f69032f91bde87ac.html#gae24fc50bd0f1ce7f69032f91bde87ac">cudaDeviceDisablePeerAccess</a> (int peerDevice)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Disables direct access to memory allocations on a peer device and unregisters any registered allocations from that device. <a href="#gae24fc50bd0f1ce7f69032f91bde87ac"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__CUDART__TYPES_gf599e5b8b829ce7db0f5216928f6ecb6.html#gf599e5b8b829ce7db0f5216928f6ecb6">cudaError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__CUDART__PEER_g9e5ea65a18938c2b8715a5602105c306.html#g9e5ea65a18938c2b8715a5602105c306">cudaDeviceEnablePeerAccess</a> (int peerDevice, unsigned int flags)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Enables direct access to memory allocations on a peer device. <a href="#g9e5ea65a18938c2b8715a5602105c306"></a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
This section describes the peer device memory access functions of the CUDA runtime application programming interface. </div>
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