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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/dma/dma-test-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">测试指南</h1>
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<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>
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<div class="- topic/body concept/conbody body conbody">
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<div class="- topic/p p" data-ofbid="d47062e33__20250123155201">DMA 测试所需的测试环境如下：<ul class="- topic/ul ul" id="concept_bst_l43_pzb__ol_rrk_pls_c1c" data-ofbid="concept_bst_l43_pzb__ol_rrk_pls_c1c">
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<li class="- topic/li li" data-ofbid="d47062e37__20250123155201"><strong class="+ topic/ph hi-d/b ph b">硬件</strong>：开发板或 FPGA 板</li>
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<li class="- topic/li li" data-ofbid="d47062e42__20250123155201"><strong class="+ topic/ph hi-d/b ph b">软件</strong>：<ul class="- topic/ul ul" id="concept_bst_l43_pzb__ul_fg2_4ls_c1c" data-ofbid="concept_bst_l43_pzb__ul_fg2_4ls_c1c">
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<li class="- topic/li li" data-ofbid="d47062e48__20250123155201">
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<p class="- topic/p p" data-ofbid="d47062e50__20250123155201">PC 端的串口终端软件，用于 PC 和开发板进行串口通信</p>
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</li>
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<li class="- topic/li li" data-ofbid="d47062e54__20250123155201">
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<p class="- topic/p p" data-ofbid="d47062e56__20250123155201">Linux 内核原生的 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">dmatest</span> 模块</p>
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<div class="- topic/note note note note_note" id="concept_bst_l43_pzb__note_ojd_xls_c1c" data-ofbid="concept_bst_l43_pzb__note_ojd_xls_c1c"><span class="note__title">注：</span> <div class="note__body"><span class="- topic/ph ph">dmatest 模块</span>只限于测试 Mem To Mem
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的数据传输操作。</div></div>
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</li>
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</ul></li>
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</ul></div>
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<section class="- topic/section section" id="concept_bst_l43_pzb__section_e1z_ccp_mdc" data-ofbid="concept_bst_l43_pzb__section_e1z_ccp_mdc"><h2 class="- topic/title title sectiontitle">配置软件</h2>
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<div class="- topic/p p" data-ofbid="d47062e75__20250123155201">进入 Luban 的根目录，执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make menuconfig</span>
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命令，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_gkt_wls_c1c" data-ofbid="concept_bst_l43_pzb__codeblock_gkt_wls_c1c"><code>Linux
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Device Drivers
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[*] DMA Engine support
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<*> DMA Test client</code></pre></div>
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</section>
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<section class="- topic/section section" id="concept_bst_l43_pzb__section_umk_bcp_mdc" data-ofbid="concept_bst_l43_pzb__section_umk_bcp_mdc"><h2 class="- topic/title title sectiontitle"><span class="+ topic/keyword sw-d/cmdname keyword cmdname">dmatest</span> 测试</h2>
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<div class="- topic/p p" data-ofbid="d47062e91__20250123155201"><span class="+ topic/keyword sw-d/cmdname keyword cmdname">dmatest</span> 模块初始化成功后，会在 Sysfs 目录创建一些节点，测试过程就是通过这些节点配置参数、启动测试。DMA
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测试步骤如下所示：<ol class="- topic/ol ol" id="concept_bst_l43_pzb__ol_kd5_fcp_mdc" data-ofbid="concept_bst_l43_pzb__ol_kd5_fcp_mdc">
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<li class="- topic/li li" data-ofbid="d47062e97__20250123155201">
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<div class="- topic/p p" data-ofbid="d47062e99__20250123155201">进入 Sysfs
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目录：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_rxz_gcp_mdc" data-ofbid="concept_bst_l43_pzb__codeblock_rxz_gcp_mdc"><code>cd /sys/module/dmatest/parameters/</code></pre></div>
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</li>
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<li class="- topic/li li" data-ofbid="d47062e105__20250123155201">
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<div class="- topic/p p" data-ofbid="d47062e107__20250123155201">执行下列命令查看参数文件列表：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_brh_3cp_mdc" data-ofbid="concept_bst_l43_pzb__codeblock_brh_3cp_mdc"><code>
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ls
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</code></pre></div>
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<div class="- topic/p p" data-ofbid="d47062e112__20250123155201">参数文件输出结果示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_zjl_jcp_mdc" data-ofbid="concept_bst_l43_pzb__codeblock_zjl_jcp_mdc"><code>alignment max_channels run transfer_size
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channel norandom test_buf_size verbose
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device noverify test_list wait
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dmatest polled threads_per_chan xor_sources
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iterations pq_sources timeout
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</code></pre></div>
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</li>
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<li class="- topic/li li" data-ofbid="d47062e118__20250123155201">
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<div class="- topic/p p" data-ofbid="d47062e120__20250123155201">根据需要配置参数，例如：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_qpq_lcp_mdc" data-ofbid="concept_bst_l43_pzb__codeblock_qpq_lcp_mdc"><code>
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echo <span class="hl-number">30</span> > iterations
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echo <span class="hl-number">8</span> > max_channels
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echo Y > polled
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echo Y > run</code></pre></div>
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</li>
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<li class="- topic/li li" data-ofbid="d47062e126__20250123155201">
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<div class="- topic/p p" data-ofbid="d47062e128__20250123155201">设置 <span class="+ topic/keyword pr-d/parmname keyword parmname">run</span> 参数为 Y 后，dmatest
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模块会自动开始测试。测试过程中会输出每个通道的测试结果，包括
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IOPS（每秒输入输出操作数）和传输速率等信息。示例输出描述如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_bst_l43_pzb__codeblock_bfs_zls_c1c" data-ofbid="concept_bst_l43_pzb__codeblock_bfs_zls_c1c"><code>
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[ <span class="hl-number">104.696480</span>] dmatest: No channels configured, <strong class="hl-keyword">continue</strong> with any
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[ <span class="hl-number">104.697377</span>] dmatest: Added <span class="hl-number">1</span> threads using dma0chan2
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...
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[ <span class="hl-number">107.106044</span>] dmatest: dma0chan9-copy0: summary <span class="hl-number">30</span> tests, <span class="hl-number">0</span> failures <span class="hl-number">106.81</span> iops <span class="hl-number">993</span> KB/s (<span class="hl-number">0</span>)</code></pre></div>
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</li>
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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="#concept_bst_l43_pzb__section_e1z_ccp_mdc" data-tocid="concept_bst_l43_pzb__section_e1z_ccp_mdc">配置软件</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_bst_l43_pzb__section_umk_bcp_mdc" data-tocid="concept_bst_l43_pzb__section_umk_bcp_mdc"><span class="+ topic/keyword sw-d/cmdname keyword cmdname">dmatest</span> 测试</a></div></li></ul></div>
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