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< / div > < div class = "- topic/body concept/conbody body conbody" > < div class = "- topic/p p" data-ofbid = "d199238e22__20250121171633" > 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" > < li class = "- topic/li li" data-ofbid = "d199238e25__20250121171633" > < strong class = "+ topic/ph hi-d/b ph b" > 硬件< / strong > ：开发板或 FPGA 板< / li > < li class = "- topic/li li" data-ofbid = "d199238e29__20250121171633" > < 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" > < li class = "- topic/li li" data-ofbid = "d199238e34__20250121171633" >
< p class = "- topic/p p" data-ofbid = "d199238e36__20250121171633" > PC 端的串口终端软件，用于 PC 和开发板进行串口通信< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d199238e39__20250121171633" >
< p class = "- topic/p p" data-ofbid = "d199238e41__20250121171633" > Linux 内核原生的 < span class = "+ topic/keyword sw-d/cmdname keyword cmdname" > dmatest< / span > 模块< / p >
< 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 > < span class = "- topic/ph ph" > dmatest 模块< / span > 只限于测试 Mem To Mem
的数据传输操作。< / div >
< / li > < / ul > < / li > < / ul > < / div > < 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 >
< div class = "- topic/p p" data-ofbid = "d199238e57__20250121171633" > 进入 Luban 的根目录，执行 < span class = "+ topic/keyword sw-d/cmdname keyword cmdname" > make menuconfig< / span >
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" > Linux
Device Drivers
[*] DMA Engine support
< *> DMA Test client< / pre > < / div >
< / section > < 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 >
< div class = "- topic/p p" data-ofbid = "d199238e72__20250121171633" > < 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" > < li class = "- topic/li li" data-ofbid = "d199238e77__20250121171633" >
< div class = "- topic/p p" data-ofbid = "d199238e79__20250121171633" > 进入 Sysfs
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" > cd /sys/module/dmatest/parameters/< / pre > < / div >
< / li > < li class = "- topic/li li" data-ofbid = "d199238e84__20250121171633" >
< div class = "- topic/p p" data-ofbid = "d199238e86__20250121171633" > 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" >
ls
< / pre > < / div >
< div class = "- topic/p p" data-ofbid = "d199238e91__20250121171633" > 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" > alignment max_channels run transfer_size
channel norandom test_buf_size verbose
device noverify test_list wait
dmatest polled threads_per_chan xor_sources
iterations pq_sources timeout
< / pre > < / div >
< / li > < li class = "- topic/li li" data-ofbid = "d199238e96__20250121171633" >
< div class = "- topic/p p" data-ofbid = "d199238e98__20250121171633" > 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" >
echo < span class = "hl-number" > 30< / span > > iterations
echo < span class = "hl-number" > 8< / span > > max_channels
echo Y > polled
echo Y > run< / pre > < / div >
< / li > < li class = "- topic/li li" data-ofbid = "d199238e103__20250121171633" >
< div class = "- topic/p p" data-ofbid = "d199238e105__20250121171633" > 设置 < span class = "+ topic/keyword pr-d/parmname keyword parmname" > run< / span > 参数为 Y 后，
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
IOPS（ ） ： < 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" >
[ < span class = "hl-number" > 104.696480< / span > ] dmatest: No channels configured, < strong class = "hl-keyword" > continue< / strong > with any
[ < span class = "hl-number" > 104.697377< / span > ] dmatest: Added < span class = "hl-number" > 1< / span > threads using dma0chan2
...
[ < 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 > )< / pre > < / 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 = "#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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