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Hi DK,Thanks! If I configure multicast on Ethernet switches and modify the code based on mvapich2 2. 3. 7, can I implement MPI_Bcast to support RocE V2 hardware UD-multicast? I'm confused whether this work involves modifying the OFED driver.
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<meta http-equiv="Content-Type" content="text/html; charset=GB18030"><div>Hi DK,Thanks! <span style=" background-color: rgb(244, 246, 248); color: rgb(36, 41, 47); ; ; ; ; ; ; ; white-space: pre-wrap; ">If I configure multicast on Ethernet switches and modify the code based on mvapich2 2.3.7, can I implement MPI_Bcast to support RocE V2 hardware UD-multicast? I'm confused whether this work involves modifying the OFED driver. And </span><span style=" background-color: rgb(244, 246, 248); color: rgb(36, 41, 47); ; ; ; ; ; ; ; white-space: pre-wrap; ">I don't know if this work makes sense? </span><span style="background-color: rgb(244, 246, 248); color: rgb(36, 41, 47); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji"; white-space: pre-wrap;">Because I feel that IB is expensive, there are currently more applications based on RoCE V2.</span></div><div><span style="font-family: "lucida Grande", Verdana, "Microsoft YaHei";">I look forward to your kind response.</span></div><div><span style="font-family: "lucida Grande", Verdana, "Microsoft YaHei";"><br></span></div><div>Best regards!</div><div><hr align="left" style="margin: 0 0 10px 0;border: 0;border-bottom:1px solid #E4E5E6;height:0;line-height:0;font-size:0;padding: 20px 0 0 0;width: 50px;"><div style="font-size:14px;font-family:Verdana;color:#000;"><a class="xm_write_card" style="white-space: normal; display: inline-block; text-decoration: none !important;font-family: -apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei;" href="https://urldefense.com/v3/__https://wx.mail.qq.com/home/index?t=readmail_businesscard_midpage&nocheck=true&name=**K&icon=http*3A*2F*2Fthirdqq.qlogo.cn*2Fg*3Fb*3Doidb*26k*3DCHiaNBlhSkKxZAicjMpUJh0w*26kti*3DZHQVagAAAAE*26s*3D640*26t*3D1557147848&mail=1432172324*40qq.com&code=UxL-tq5sRqfSAzK3AALbqQ6o60lPxcjPjnLk1W8t39uwjCxxZKvgEnbUqJstTSp3uQhZq-z2TCAtdcO-hA41pA__;5LqR5reh6aOO6L27JSUlJSUlJSUlJSUlJSUl!!KGKeukY!znr27rTl5rNWgc2QU51dfLC_xQoRwMZYYh32G21eftf75XNMlNish3y5VtiO0DGNSFWNK1a6GMr6MfbjuBX8c7QLWgJS$" target="_blank"><table style="white-space: normal;table-layout: fixed; padding-right: 20px;" contenteditable="false" cellpadding="0" cellspacing="0"><tbody><tr valign="top"><td style="width: 40px;min-width: 40px; padding-top:10px"><div style="width: 38px; height: 38px; border: 1px #FFF solid; border-radius:50%; margin: 0;vertical-align: top;box-shadow: 0 0 10px 0 rgba(127,152,178,0.14);"><img src="http://thirdqq.qlogo.cn/g?b=oidb&k=CHiaNBlhSkKxZAicjMpUJh0w&kti=ZHQVagAAAAE&s=640&t=1557147848" style="width:100%;border-radius:50%;pointer-events: none;"></div></td><td style="padding: 10px 0 8px 10px;"><div class="businessCard_name" style="font-size: 14px;color: #33312E;line-height: 20px; padding-bottom: 2px; margin:0;font-weight: 500;">云淡风轻</div><div class="businessCard_mail" style="font-size: 12px;color: #999896;line-height: 18px; margin:0;">1432172324@qq.com</div></td></tr></tbody></table></a></div></div><div> </div><div style="position: relative;"><div><br></div><div><br></div><div style="font-size: 12px;font-family: Arial Narrow;padding:2px 0 2px 0;">------------------ 原始邮件 ------------------</div><div style="font-size: 12px;background:#efefef;padding:8px;"><div><b>发件人:</b> "Panda, Dhabaleswar" <panda@cse.ohio-state.edu>;</div><div><b>发送时间:</b> 2023年5月29日(星期一) 晚上7:34</div><div><b>收件人:</b> "mvapich-discuss"<mvapich-discuss@lists.osu.edu>;"云淡风轻"<1432172324@qq.com>;<wbr></div><div></div><div><b>主题:</b> Re: [Mvapich-discuss] Can MPI_Bcast of the mvapich2 2.3.7 support for RocE V2 hardware UD-multicast?</div></div><div><br></div>Thanks for your question. ROCEv2 adapters get connected to Ethernet switches (not InfiniBand switches). These switches do not include UD-based multicast. Thus, MPI_Bcast of the mvapich2 2.3.7 does not support ROCE V2 hardware UD-multicast.<br><br>DK<br><br>________________________________________<br>From: Mvapich-discuss <mvapich-discuss-bounces+panda.2=osu.edu@lists.osu.edu> on behalf of 云淡风轻 via Mvapich-discuss <mvapich-discuss@lists.osu.edu><br>Sent: Sunday, May 28, 2023 11:17 PM<br>To: mvapich-discuss<br>Subject: [Mvapich-discuss] Can MPI_Bcast of the mvapich2 2.3.7 support for RocE V2 hardware UD-multicast?<br><br>Hello， Can MPI_Bcast of the mvapich2 2. 3. 7 support for RocE V2 hardware UD-multicast? If it is supported, how should the environment variable parameters be set? Best regards! 云淡风轻 1432172324@ qq. com <br><br>Hello，<br> Can MPI_Bcast of the mvapich2 2.3.7 support for RocE V2 hardware UD-multicast? If it is supported, how should the environment variable parameters be set?<br>Best regards!<br><br>________________________________<br><https://urldefense.com/v3/__https://wx.mail.qq.com/home/index?t=readmail_businesscard_midpage&nocheck=true&name=**K&icon=http*3A*2F*2Fthirdqq.qlogo.cn*2Fg*3Fb*3Doidb*26k*3Dyf9ia4DhPfI3Nr6M9DUQZCA*26kti*3DZHBOlQAAAAI*26s*3D640*26t*3D1557147848&mail=1432172324*40qq.com&code=90L2FWxc8J3_eurNDijgvKYmrdQIJLFv1qaoOoCeJpZ-Iz1dmYKj5625u3xI-Ixk75T-J0fkAJsawqRzIvlFuw__;5LqR5reh6aOO6L27JSUlJSUlJSUlJSUlJSUl!!KGKeukY!22gezYDeYXPB_dgbgE3uflJVL0sPTMSv7VzB33jkdHVklMG9Bl4dMpOg9fWKMg5jh8I0qkp7AS34EZhA4p4u7QH7vUHs$%3E<br>[<a href="https://urldefense.com/v3/__http://thirdqq.qlogo.cn/g?b=oidb&k=yf9ia4DhPfI3Nr6M9DUQZCA&kti=ZHBOlQAAAAI&s=640&t=1557147848__;!!KGKeukY!znr27rTl5rNWgc2QU51dfLC_xQoRwMZYYh32G21eftf75XNMlNish3y5VtiO0DGNSFWNK1a6GMr6MfbjuBX8c807y0O0$">http://thirdqq.qlogo.cn/g?b=oidb&k=yf9ia4DhPfI3Nr6M9DUQZCA&kti=ZHBOlQAAAAI&s=640&t=1557147848</a>]<br>云淡风轻<br>1432172324@qq.com<br></div>