https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-16011 Lustre <p>Cray testing have show an LST limited with 35Gb/s 1M bulk transfers with 3 rail server and 16 HDR clients. During profile, I found a LST is cpu bound with page cache operations, because server side don't have an preallocated bulk's for transfers.<br/> Once preallocation done - server able to achieve a wire speed - 73 Gb/s with very low cpu power.</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>LNet Bandwidth of servers] [R] Avg: 11.28 MB/s Min: 11.28 MB/s Max: 11.28 MB/s [W] Avg: 73949.30 MB/s Min: 73949.30 MB/s Max: 73949.30 MB/s </pre> </div></div> LU-16011

LNet selftest should use a preallocated bulk on the server side.

Improvement Critical Resolved Fixed Alexey Lyashkov Alexey Lyashkov Thu, 14 Jul 2022 06:23:22 +0000 Mon, 13 Mar 2023 14:32:00 +0000 Thu, 1 Sep 2022 12:59:17 +0000 Lustre 2.16.0 0 2 <p>"Alexey Lyashkov &lt;alexey.lyashkov@hpe.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/47952" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/47952</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16011" title="LNet selftest should use a preallocated bulk on the server side." class="issue-link" data-issue-key="LU-16011"><del>LU-16011</del></a> lnet: use preallocate bulk for server<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 9c6a446980903345e88b449d10e2854735c5fa17</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/47952/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/47952/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16011" title="LNet selftest should use a preallocated bulk on the server side." class="issue-link" data-issue-key="LU-16011"><del>LU-16011</del></a> lnet: use preallocate bulk for server<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 2447564e120cf622627a5ab81051657f6ce5ece2</p> <p>Landed for 2.16</p> <p>"Alexey Lyashkov &lt;alexey.lyashkov@hpe.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/50276" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/50276</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16011" title="LNet selftest should use a preallocated bulk on the server side." class="issue-link" data-issue-key="LU-16011"><del>LU-16011</del></a> lnet: use preallocate bulk for server<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: c5b2887240a85712e3a4b741ece40f0f9c248c27</p> Development Rank 1|i02ukv: Rank (Obsolete) 9223372036854775807