.

go/todo.dot

@@ -82,6 +82,7 @@ digraph {
 	osnet_latency	-> rx_no_delay;
 	osnet_latency	-> nocstates;
 	osnet_latency	-> tcp_latency;
+	tcp_latency	-> rtl_tcp_2eth;
 
 	rx_no_delay	-> rtl_patch;
 
@@ -89,6 +90,7 @@ digraph {
 	rx_no_delay	[label="net rx\nno delay" style=filled fillcolor=lightyellow];
 	nocstates	[label="disable >C1" style=filled fillcolor=lightyellow];
 	tcp_latency	[label="TCP RR\nlatency"];
+	rtl_tcp_2eth	[label="RTL: TCP RR ↑ 400μs\n on 1 eth.f -> 2 eth.f"];
 
 	rtl_patch	[label="r8169 patch\nethtool -C" style=filled fillcolor=lightyellow];
 }

go/todo.svg

@@ -305,15 +305,26 @@
 <text text-anchor="middle" x="754" y="-571.52" font-family="Times,serif" font-size="14.00">Post</text>
 </g>
 <!-- rtl_patch -->
-<g id="node28" class="node"><title>rtl_patch</title>
-<ellipse fill="lightyellow" stroke="black" cx="840" cy="-26.8701" rx="57.0522" ry="26.7407"/>
-<text text-anchor="middle" x="840" y="-30.6701" font-family="Times,serif" font-size="14.00">r8169 patch</text>
-<text text-anchor="middle" x="840" y="-15.6701" font-family="Times,serif" font-size="14.00">ethtool &#45;C</text>
+<g id="node29" class="node"><title>rtl_patch</title>
+<ellipse fill="lightyellow" stroke="black" cx="876" cy="-26.8701" rx="57.0522" ry="26.7407"/>
+<text text-anchor="middle" x="876" y="-30.6701" font-family="Times,serif" font-size="14.00">r8169 patch</text>
+<text text-anchor="middle" x="876" y="-15.6701" font-family="Times,serif" font-size="14.00">ethtool &#45;C</text>
 </g>
 <!-- rx_no_delay&#45;&gt;rtl_patch -->
-<g id="edge28" class="edge"><title>rx_no_delay&#45;&gt;rtl_patch</title>
-<path fill="none" stroke="black" d="M840,-89.2852C840,-81.3185 840,-72.4275 840,-63.9391"/>
-<polygon fill="black" stroke="black" points="843.5,-63.874 840,-53.874 836.5,-63.8741 843.5,-63.874"/>
+<g id="edge29" class="edge"><title>rx_no_delay&#45;&gt;rtl_patch</title>
+<path fill="none" stroke="black" d="M850.413,-90.2321C853.927,-81.6677 857.913,-71.9524 861.675,-62.7825"/>
+<polygon fill="black" stroke="black" points="864.928,-64.0752 865.486,-53.4951 858.452,-61.418 864.928,-64.0752"/>
+</g>
+<!-- rtl_tcp_2eth -->
+<g id="node28" class="node"><title>rtl_tcp_2eth</title>
+<ellipse fill="none" stroke="black" cx="698" cy="-26.8701" rx="102.561" ry="26.7407"/>
+<text text-anchor="middle" x="698" y="-30.6701" font-family="Times,serif" font-size="14.00">RTL: TCP RR ↑ 400μs</text>
+<text text-anchor="middle" x="698" y="-15.6701" font-family="Times,serif" font-size="14.00"> on 1 eth.f &#45;&gt; 2 eth.f</text>
+</g>
+<!-- tcp_latency&#45;&gt;rtl_tcp_2eth -->
+<g id="edge28" class="edge"><title>tcp_latency&#45;&gt;rtl_tcp_2eth</title>
+<path fill="none" stroke="black" d="M722.877,-90.2321C719.526,-81.8322 715.733,-72.3252 712.138,-63.3115"/>
+<polygon fill="black" stroke="black" points="715.3,-61.7914 708.344,-53.8 708.798,-64.3851 715.3,-61.7914"/>
 </g>
 </g>
 </svg>