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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/app/psram_load.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">分散加载</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d266837e19__20250121171734">分散加载方案是一种将负载分散到多个资源或服务器的方法，以实现负载均衡和提高系统的可用性和性能。分散加载方案的主要目标是确保在高并发访问时，每个资源或服务器都能得到适当的负载，从而避免单点故障和性能瓶颈。</p><section class="- topic/section section" id="id__section_myr_j1q_wcc" data-ofbid="id__section_myr_j1q_wcc"><h2 class="- topic/title title sectiontitle">SDK 默认代码分布</h2>
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<p class="- topic/p p" data-ofbid="d266837e26__20250121171734">D13x
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系列芯片 SRAM 大小为 1M Bytes，PSRAM 大小为 8M Bytes。发布的 SDK
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默认配置是：系统运行时，代码段、rodata 段、data 段加载到 SRAM_S0，而 BSS 段位于 PSRAM_CMA (可参考
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bsp/artinchip/sys/d13x/link_script/gcc_aic.ld.S)。在系统启动阶段，BootLoader 是加载到 SRAM 的最后
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256KB 空间执行的，如下图所示：</p>
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<figure class="- topic/fig fig fignone" id="id__fig_ot2_5pq_gdc" data-ofbid="id__fig_ot2_5pq_gdc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_pt2_5pq_gdc" src="../../../images/memory/sram_s0.png" alt="sram_s0"/></div><br/></figure>
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<p class="- topic/p p" data-ofbid="d266837e37__20250121171734">所以，加载到 SRAM_S0 的代码段、rodata 段或 data 段不能超过 768KB 的大小，否则会覆盖 BootLoader，导致系统启动失败。</p>
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</section><section class="- topic/section section" id="id__section_nyr_j1q_wcc" data-ofbid="id__section_nyr_j1q_wcc"><h2 class="- topic/title title sectiontitle">分散加载</h2>
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<p class="- topic/p p" data-ofbid="d266837e47__20250121171734">在应用推广中，有的用户的代码量超过 768KB，有的用户想把部分代码或数据放到 PSRAM，为了实现不同的用户需求，在 D13x
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中实现了分散加载功能。用户可以将代码段、rodata 段、data 段，或者是部分代码段或部分数据段加载到 SRAM 或 PSRAM，由 BootLoader
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实现分散加载。</p>
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<p class="- topic/p p" data-ofbid="d266837e51__20250121171734">具体配置可以参考 <span class="- topic/ph ph">Luban-Lite</span>
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<a class="- topic/xref xref" href="../mem/memory-user-guide.html">Memory 使用指南</a> 的内存章节。</p>
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</section></div></article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#id__section_myr_j1q_wcc" data-tocid="id__section_myr_j1q_wcc">SDK 默认代码分布</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_nyr_j1q_wcc" data-tocid="id__section_nyr_j1q_wcc">分散加载</a></div></li></ul></div>
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|
||
</div>
|
||
<footer class="navbar navbar-default wh_footer">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style><!--
|
||
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
|
||
--></style>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div><div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-01-21
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</footer>
|
||
|
||
<div id="go2top" class="d-print-none">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</div>
|
||
|
||
<div id="modal_img_large" class="modal">
|
||
<span class="close oxy-icon oxy-icon-remove"></span>
|
||
<div id="modal_img_container"></div>
|
||
<div id="caption"></div>
|
||
</div>
|
||
|
||
|
||
<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
||
|
||
|
||
</body>
|
||
</html> |