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Hello,</div>
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Bruce Richardson suggested that I submit this patch - at IBM we needed to adjust the
<code>pkt_mbuf_headroom</code> for our application to work. This is my first ever patch through a mailing list, I have only done it through Pull Requests before, so let me know if I need to correct something.<br>
<br>
Message:<br>
Add meson configuration option to adjust RTE_PKTMBUF_HEADROOM</div>
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<br>
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<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">diff --git a/config/meson.build b/config/meson.build</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">index 7cd375e991..43b765ade1 100644</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">--- a/config/meson.build</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+++ b/config/meson.build</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">@@ -304,6 +304,7 @@ endforeach</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>dpdk_conf.set('RTE_MAX_ETHPORTS', get_option('max_ethports'))</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>dpdk_conf.set('RTE_LIBEAL_USE_HPET', get_option('use_hpet'))</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>dpdk_conf.set('RTE_ENABLE_TRACE_FP', get_option('enable_trace_fp'))</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+dpdk_conf.set('RTE_PKTMBUF_HEADROOM', get_option('pkt_mbuf_headroom'))</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span># values which have defaults which may be overridden</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>dpdk_conf.set('RTE_MAX_VFIO_GROUPS', 64)</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>dpdk_conf.set('RTE_DRIVER_MEMPOOL_BUCKET_SIZE_KB', 64)</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">diff --git a/config/rte_config.h b/config/rte_config.h</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">index 7b8c85e948..a2bb4ea61b 100644</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">--- a/config/rte_config.h</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+++ b/config/rte_config.h</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">@@ -51,7 +51,6 @@</span></p>
<p style="font-family:Menlo;margin:0px;min-height:19px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px"><span style="margin:0px" class="ContentPasted0"> </span></span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>/* mbuf defines */</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>#define RTE_MBUF_DEFAULT_MEMPOOL_OPS "ring_mp_mc"</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">-#define RTE_PKTMBUF_HEADROOM 128</span></p>
<p style="font-family:Menlo;margin:0px;min-height:19px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px"><span style="margin:0px" class="ContentPasted0"> </span></span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>/* ether defines */</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>#define RTE_MAX_QUEUES_PER_PORT 1024</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">diff --git a/meson_options.txt b/meson_options.txt</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">index 08528492f7..169fcc94c7 100644</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">--- a/meson_options.txt</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+++ b/meson_options.txt</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">@@ -36,6 +36,8 @@ option('machine', type: 'string', value: 'auto', description:</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> <span class="ContentPasted0"> </span></span>'Alias of cpu_instruction_set.')</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>option('max_ethports', type: 'integer', value: 32, description:</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> <span class="ContentPasted0"> </span></span>'maximum number of Ethernet
devices')</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+option('pkt_mbuf_headroom', type: 'integer', value: 128, description:</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0">+<span class="ContentPasted0"> </span><span style="margin:0px" class="ContentPasted0"> <span class="ContentPasted0"> </span></span>'<span style="font-family:Menlo, serif;background-color:rgb(255, 255, 255);display:inline !important">number
of bytes skipped on Rx at the start of the packet buffer to leave room for additional packet headers</span>')</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>option('max_lcores', type: 'string', value: 'default', description:</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> <span class="ContentPasted0"> </span></span>'Set maximum number of cores/threads
supported by EAL; "default" is different per-arch, "detect" detects the number of cores on the build machine.')</span></p>
<p style="font-family:Menlo;margin:0px"><span style="font-variant-ligatures:no-common-ligatures;margin:0px" class="ContentPasted0"><span style="margin:0px" class="ContentPasted0"> </span>option('max_numa_nodes', type: 'string', value: 'default', description:</span></p>
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