<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#C0C0C0">
<p>Hi Alexey</p>
<p> You are right, I think is wrong, I debug this case again,</p>
<p>and find the driver is virtio_net no support busy poll.</p>
<p>Thanks your advise.</p>
<p>Best Regards,<br>
</p>
<p>Lianwen Sun.<br>
</p>
<br>
<div class="moz-cite-prefix">On 03/19/2018 08:25 PM, Alexey Kodanev
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:fae2ea47-a416-f2b4-ee2b-f022f14a14a0@oracle.com">
<pre wrap="">On 19.03.2018 11:18, sunlianwen wrote:
</pre>
<blockquote type="cite">
<pre wrap="">set low latency busy poll to 50 per socket will
spent more time than set low latency busy poll
to 0 per socket. that mean the value of res_50
is bigger than res_0, so the value of poll_comp
always less than zero and test fail.
</pre>
</blockquote>
<pre wrap="">
No, if busy poll is enabled, i.e. value set above 0, we should expect
performance gain in this test.
With what driver and kernel version you have such results?
Is it really supported by that driver?
Thanks,
Alexey
</pre>
</blockquote>
<br>
</body>
</html>