Ben Sander
eced013ae4
- Some comments in hip_hcc.cpp - document hipHostRegister* flags. - expand docs on hipHostRegister/Unregister. Use "register" rather than "pin" to describe action these take. - change required CUDA version to 6 (require unified memory) - remake doxygen.
343 行
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343 行
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<div class="title">Device Memory Access<div class="ingroups"><a class="el" href="group__API.html">HIP API</a></div></div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:gab53a55dbc087ff659918fd04287de3d3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__PeerToPeer.html#gab53a55dbc087ff659918fd04287de3d3">hipDeviceCanAccessPeer</a> (int *canAccessPeer, int device, int peerDevice)</td></tr>
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<tr class="memdesc:gab53a55dbc087ff659918fd04287de3d3"><td class="mdescLeft"> </td><td class="mdescRight">Determine if a device can access a peer's memory. <a href="#gab53a55dbc087ff659918fd04287de3d3">More...</a><br/></td></tr>
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<tr class="separator:gab53a55dbc087ff659918fd04287de3d3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga41e60c01f63597529da1cd77bdd55379"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__PeerToPeer.html#ga41e60c01f63597529da1cd77bdd55379">hipDeviceDisablePeerAccess</a> (int peerDevice)</td></tr>
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<tr class="memdesc:ga41e60c01f63597529da1cd77bdd55379"><td class="mdescLeft"> </td><td class="mdescRight">Disables registering memory on peerDevice for direct access from the current device. <a href="#ga41e60c01f63597529da1cd77bdd55379">More...</a><br/></td></tr>
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<tr class="separator:ga41e60c01f63597529da1cd77bdd55379"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga098e0d626edbfb69b66d141a5a8b7dc6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__PeerToPeer.html#ga098e0d626edbfb69b66d141a5a8b7dc6">hipDeviceEnablePeerAccess</a> (int peerDevice, unsigned int flags)</td></tr>
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<tr class="memdesc:ga098e0d626edbfb69b66d141a5a8b7dc6"><td class="mdescLeft"> </td><td class="mdescRight">Enables registering memory on peerDevice for direct access from the current device. <a href="#ga098e0d626edbfb69b66d141a5a8b7dc6">More...</a><br/></td></tr>
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<tr class="separator:ga098e0d626edbfb69b66d141a5a8b7dc6"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga72ae9e7f498ab5684580892a5d7d8e2d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__PeerToPeer.html#ga72ae9e7f498ab5684580892a5d7d8e2d">hipMemcpyPeer</a> (void *dst, int dstDevice, const void *src, int srcDevice, size_t sizeBytes)</td></tr>
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<tr class="memdesc:ga72ae9e7f498ab5684580892a5d7d8e2d"><td class="mdescLeft"> </td><td class="mdescRight">Copies memory from one device to memory on another device. <a href="#ga72ae9e7f498ab5684580892a5d7d8e2d">More...</a><br/></td></tr>
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<tr class="separator:ga72ae9e7f498ab5684580892a5d7d8e2d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab6211c18ca1e23252ef080cd6be855ca"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__PeerToPeer.html#gab6211c18ca1e23252ef080cd6be855ca">hipMemcpyPeerAsync</a> (void *dst, int dstDevice, const void *src, int srcDevice, size_t sizeBytes, hipStream_t stream=0)</td></tr>
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<tr class="memdesc:gab6211c18ca1e23252ef080cd6be855ca"><td class="mdescLeft"> </td><td class="mdescRight">Copies memory from one device to memory on another device. <a href="#gab6211c18ca1e23252ef080cd6be855ca">More...</a><br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<h2>----------------------------------------------------------------------------------------------— </h2>
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gab53a55dbc087ff659918fd04287de3d3"></a>
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<td class="memname"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> hipDeviceCanAccessPeer </td>
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<td>(</td>
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<td class="paramtype">int * </td>
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<td class="paramname"><em>canAccessPeer</em>, </td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>device</em>, </td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>peerDevice</em> </td>
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<td></td>
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<td>)</td>
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<p>Determine if a device can access a peer's memory. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramdir">[out]</td><td class="paramname">canAccessPeer</td><td>returns true if specified devices are peers. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">device</td><td></td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">peerDevice</td><td>Returns "1" in <code>canAccessPeer</code> if the specified <code>device</code> is capable of directly accessing memory physically located on peerDevice , or "0" if not.</td></tr>
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</dl>
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<dl class="section warning"><dt>Warning</dt><dd>HCC returns 0 in *canAccessPeer ; Need to update this function when RT supports P2P </dd></dl>
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<td class="memname"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> hipDeviceDisablePeerAccess </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>peerDevice</em></td><td>)</td>
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<td></td>
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<p>Disables registering memory on peerDevice for direct access from the current device. </p>
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<p>If there are any allocations on peerDevice which were registered in the current device using hipPeerRegister() then these allocations will be automatically unregistered. Returns hipErrorPeerAccessNotEnabled if direct access to memory on peerDevice has not yet been enabled from the current device.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir">[in]</td><td class="paramname">peerDevice</td><td>TODO:cudaErrorPeerAccessNotEnabled and cudaErrorInvalidDevice error not supported in HIP, return hipErrorUnknown Returns <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aadfbdb847b149723c684ebd764556063" title="Successful completion. ">hipSuccess</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aa74e64c5b2f5fb0d6a92681f5b234073" title="Unknown error. ">hipErrorUnknown</a></td></tr>
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<dl class="section warning"><dt>Warning</dt><dd>Need to update this function when RT supports P2P </dd></dl>
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<a class="anchor" id="ga098e0d626edbfb69b66d141a5a8b7dc6"></a>
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<td class="memname"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> hipDeviceEnablePeerAccess </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>peerDevice</em>, </td>
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<td></td>
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<td class="paramtype">unsigned int </td>
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<td class="paramname"><em>flags</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<p>Enables registering memory on peerDevice for direct access from the current device. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramdir">[in]</td><td class="paramname">peerDevice</td><td></td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>TODO:cudaErrorInvalidDevice error not supported in HIP, return hipErrorUnknown Returns <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aadfbdb847b149723c684ebd764556063" title="Successful completion. ">hipSuccess</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a07ab9b704ea693c1781a52741c60cd0d" title="DeviceID must be in range 0...#compute-devices. ">hipErrorInvalidDevice</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a1e8215fe1108a508bad3944bce7b4d83" title="One or more of the parameters passed to the API call is NULL or not in an acceptable range...">hipErrorInvalidValue</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aa74e64c5b2f5fb0d6a92681f5b234073" title="Unknown error. ">hipErrorUnknown</a></td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section warning"><dt>Warning</dt><dd>Need to update this function when RT supports P2P </dd></dl>
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<a class="anchor" id="ga72ae9e7f498ab5684580892a5d7d8e2d"></a>
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<td class="memname"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> hipMemcpyPeer </td>
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<td>(</td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>dst</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int </td>
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<td class="paramtype">const void * </td>
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<td class="paramname"><em>src</em>, </td>
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<td class="paramname"><em>srcDevice</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">size_t </td>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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<p>Copies memory from one device to memory on another device. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir">[out]</td><td class="paramname">dst</td><td>- Destination device pointer. </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">dstDevice</td><td>- Destination device </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">src</td><td>- Source device pointer </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">srcDevice</td><td>- Source device </td></tr>
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<tr><td class="paramdir">[in]</td><td class="paramname">sizeBytes</td><td>- Size of memory copy in bytes</td></tr>
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<p>Returns <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aadfbdb847b149723c684ebd764556063" title="Successful completion. ">hipSuccess</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a1e8215fe1108a508bad3944bce7b4d83" title="One or more of the parameters passed to the API call is NULL or not in an acceptable range...">hipErrorInvalidValue</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a07ab9b704ea693c1781a52741c60cd0d" title="DeviceID must be in range 0...#compute-devices. ">hipErrorInvalidDevice</a> </p>
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<td class="memname"><a class="el" href="group__GlobalDefs.html#gadf5010f6e140a53ecbdf949e73e87594">hipError_t</a> hipMemcpyPeerAsync </td>
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<td>(</td>
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<td class="paramtype">void * </td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>dstDevice</em>, </td>
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</tr>
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<tr>
|
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<td class="paramkey"></td>
|
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<td></td>
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<td class="paramtype">const void * </td>
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<td class="paramname"><em>src</em>, </td>
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</tr>
|
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<tr>
|
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<td class="paramkey"></td>
|
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<td></td>
|
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<td class="paramtype">int </td>
|
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<td class="paramname"><em>srcDevice</em>, </td>
|
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</tr>
|
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<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">size_t </td>
|
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<td class="paramname"><em>sizeBytes</em>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">hipStream_t </td>
|
|
<td class="paramname"><em>stream</em> </td>
|
|
</tr>
|
|
<tr>
|
|
<td></td>
|
|
<td>)</td>
|
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<td></td><td></td>
|
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Copies memory from one device to memory on another device. </p>
|
|
<dl class="params"><dt>Parameters</dt><dd>
|
|
<table class="params">
|
|
<tr><td class="paramdir">[out]</td><td class="paramname">dst</td><td>- Destination device pointer. </td></tr>
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">dstDevice</td><td>- Destination device </td></tr>
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">src</td><td>- Source device pointer </td></tr>
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">srcDevice</td><td>- Source device </td></tr>
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">sizeBytes</td><td>- Size of memory copy in bytes </td></tr>
|
|
<tr><td class="paramdir">[in]</td><td class="paramname">stream</td><td>- Stream identifier</td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
<p>Returns <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594aadfbdb847b149723c684ebd764556063" title="Successful completion. ">hipSuccess</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a1e8215fe1108a508bad3944bce7b4d83" title="One or more of the parameters passed to the API call is NULL or not in an acceptable range...">hipErrorInvalidValue</a>, <a class="el" href="group__GlobalDefs.html#ggadf5010f6e140a53ecbdf949e73e87594a07ab9b704ea693c1781a52741c60cd0d" title="DeviceID must be in range 0...#compute-devices. ">hipErrorInvalidDevice</a></p>
|
|
<dl class="bug"><dt><b><a class="el" href="bug.html#_bug000004">Bug:</a></b></dt><dd>This function uses a synchronous copy </dd></dl>
|
|
<dl class="bug"><dt><b><a class="el" href="bug.html#_bug000007">Bug:</a></b></dt><dd>This function uses a synchronous copy </dd></dl>
|
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|
|
</div>
|
|
</div>
|
|
</div><!-- contents -->
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</a> 1.8.6
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