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<a href="metal_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright © 2023-2024 Apple Inc.</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span> </div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#pragma once</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span> </div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include <unordered_map></span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <variant></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include "<a class="code" href="array_8h.html">mlx/array.h</a>"</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> </div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacemlx_1_1core_1_1metal.html">mlx::core::metal</a> {</div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">/* Check if the Metal backend is available. */</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a0cdf2c08c7bc0927a86070adc206987f"> 13</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a0cdf2c08c7bc0927a86070adc206987f">is_available</a>();</div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment">/* Get the actively used memory in bytes.</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment"> * Note, this will not always match memory use reported by the system because</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment"> * it does not include cached memory buffers.</span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a7b75c2639016ac4d350fa6c9da386667"> 20</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a7b75c2639016ac4d350fa6c9da386667">get_active_memory</a>();</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="comment">/* Get the peak amount of used memory in bytes.</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="comment"> * The maximum memory used recorded from the beginning of the program</span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="comment"> * execution or since the last call to reset_peak_memory.</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a4b67d680cefa95f0ed5801f0e14e48ce"> 27</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a4b67d680cefa95f0ed5801f0e14e48ce">get_peak_memory</a>();</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="comment">/* Reset the peak memory to zero.</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#adec8bb375da6c9dd5ff625a3a8434122"> 31</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#adec8bb375da6c9dd5ff625a3a8434122">reset_peak_memory</a>();</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment">/* Get the cache size in bytes.</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment"> * The cache includes memory not currently used that has not been returned</span></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment"> * to the system allocator.</span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a43307654f62ed7c58e014be7fb03909c"> 38</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a43307654f62ed7c58e014be7fb03909c">get_cache_memory</a>();</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">/* Set the memory limit.</span></div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment"> * Calls to malloc will wait on scheduled tasks if the limit is exceeded. If</span></div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment"> * there are no more scheduled tasks an error will be raised if relaxed</span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment"> * is false or memory will be allocated (including the potential for</span></div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment"> * swap) if relaxed is true.</span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment"> * The memory limit defaults to 1.5 times the maximum recommended working set</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="comment"> * size reported by the device.</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="comment"> * Returns the previous memory limit.</span></div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a3fb2c4a237fa4bfdff798156146c4937"> 51</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a3fb2c4a237fa4bfdff798156146c4937">set_memory_limit</a>(<span class="keywordtype">size_t</span> limit, <span class="keywordtype">bool</span> relaxed = <span class="keyword">true</span>);</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="comment">/* Set the free cache limit.</span></div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="comment"> * If using more than the given limit, free memory will be reclaimed</span></div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="comment"> * from the cache on the next allocation. To disable the cache,</span></div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="comment"> * set the limit to 0.</span></div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="comment"> * The cache limit defaults to the memory limit.</span></div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="comment"> * Returns the previous cache limit.</span></div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#ab09c9b60f1e886ab859e6a066c9a5b9d"> 62</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#ab09c9b60f1e886ab859e6a066c9a5b9d">set_cache_limit</a>(<span class="keywordtype">size_t</span> limit);</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="comment">/* Clear the memory cache. */</span></div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a22b3384ebd17f2fca198f81b9f1b6dc3"> 65</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a22b3384ebd17f2fca198f81b9f1b6dc3">clear_cache</a>();</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="comment">/* Set the wired size limit.</span></div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="comment"> * Note, this function is only useful for macOS 15.0 or higher.</span></div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span><span class="comment"> * The wired limit is the total size in bytes of memory that will be kept</span></div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span><span class="comment"> * resident. The default value is ``0``.</span></div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><span class="comment"> * Setting a wired limit larger than system wired limit is an error.</span></div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment"> * Returns the previous wired limit.</span></div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment"> * */</span></div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a31eab4828d31d292bc84e07b0d961e1e"> 78</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a31eab4828d31d292bc84e07b0d961e1e">set_wired_limit</a>(<span class="keywordtype">size_t</span> limit);</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span></div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#aa47cb5651bf3b65c46ab216b7e504d77"> 81</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#aa47cb5651bf3b65c46ab216b7e504d77">start_capture</a>(std::string path = <span class="stringliteral">""</span>);</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#ac90714424e36fb01e04550de69b8314f"> 82</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#ac90714424e36fb01e04550de69b8314f">stop_capture</a>();</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span></div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span>std::unordered_map<std::string, std::variant<std::string, size_t>></div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core_1_1metal.html#a6ad19c44efabb7423f973407926ead61"> 86</a></span><a class="code hl_function" href="namespacemlx_1_1core_1_1metal.html#a6ad19c44efabb7423f973407926ead61">device_info</a>();</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> </div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>} <span class="comment">// namespace mlx::core::metal</span></div>
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<div class="ttc" id="aarray_8h_html"><div class="ttname"><a href="array_8h.html">array.h</a></div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html">mlx::core::metal</a></div><div class="ttdef"><b>Definition</b> allocator.h:13</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a0cdf2c08c7bc0927a86070adc206987f"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a0cdf2c08c7bc0927a86070adc206987f">mlx::core::metal::is_available</a></div><div class="ttdeci">bool is_available()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a22b3384ebd17f2fca198f81b9f1b6dc3"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a22b3384ebd17f2fca198f81b9f1b6dc3">mlx::core::metal::clear_cache</a></div><div class="ttdeci">void clear_cache()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a31eab4828d31d292bc84e07b0d961e1e"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a31eab4828d31d292bc84e07b0d961e1e">mlx::core::metal::set_wired_limit</a></div><div class="ttdeci">size_t set_wired_limit(size_t limit)</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a3fb2c4a237fa4bfdff798156146c4937"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a3fb2c4a237fa4bfdff798156146c4937">mlx::core::metal::set_memory_limit</a></div><div class="ttdeci">size_t set_memory_limit(size_t limit, bool relaxed=true)</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a43307654f62ed7c58e014be7fb03909c"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a43307654f62ed7c58e014be7fb03909c">mlx::core::metal::get_cache_memory</a></div><div class="ttdeci">size_t get_cache_memory()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a4b67d680cefa95f0ed5801f0e14e48ce"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a4b67d680cefa95f0ed5801f0e14e48ce">mlx::core::metal::get_peak_memory</a></div><div class="ttdeci">size_t get_peak_memory()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a6ad19c44efabb7423f973407926ead61"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a6ad19c44efabb7423f973407926ead61">mlx::core::metal::device_info</a></div><div class="ttdeci">std::unordered_map< std::string, std::variant< std::string, size_t > > device_info()</div><div class="ttdoc">Get information about the GPU and system settings.</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_a7b75c2639016ac4d350fa6c9da386667"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#a7b75c2639016ac4d350fa6c9da386667">mlx::core::metal::get_active_memory</a></div><div class="ttdeci">size_t get_active_memory()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_aa47cb5651bf3b65c46ab216b7e504d77"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#aa47cb5651bf3b65c46ab216b7e504d77">mlx::core::metal::start_capture</a></div><div class="ttdeci">void start_capture(std::string path="")</div><div class="ttdoc">Capture a GPU trace, saving it to an absolute file path</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_ab09c9b60f1e886ab859e6a066c9a5b9d"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#ab09c9b60f1e886ab859e6a066c9a5b9d">mlx::core::metal::set_cache_limit</a></div><div class="ttdeci">size_t set_cache_limit(size_t limit)</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_ac90714424e36fb01e04550de69b8314f"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#ac90714424e36fb01e04550de69b8314f">mlx::core::metal::stop_capture</a></div><div class="ttdeci">void stop_capture()</div></div>
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<div class="ttc" id="anamespacemlx_1_1core_1_1metal_html_adec8bb375da6c9dd5ff625a3a8434122"><div class="ttname"><a href="namespacemlx_1_1core_1_1metal.html#adec8bb375da6c9dd5ff625a3a8434122">mlx::core::metal::reset_peak_memory</a></div><div class="ttdeci">void reset_peak_memory()</div></div>
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