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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">Hi OpenSSL tech specialist:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">I would like to benchmark TLS1.3 handshake in OpenSSL1.1.1 including 1.
<b>client CPU time</b>, 2. <b>server CPU time</b> and 3. <b>total handshake <span style="color:black">
wall clock </span>time. </b>I tried to use <b>openssl s_time</b> to get three of them but found out that it
<b>does not provide</b> <b>server CPU time</b> as shown below:<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">Then I<b>
</b>used following commands<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">Setup TLS1.3 server:
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:.5in"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">openssl s_server -cert ecdsa_srv.crt -key ecdsa_srv.key -www -tls1_3<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">Using s_time from client side:
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:.5in"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">openssl s_time -ciphersuites TLS_AES_128_GCM_SHA256 -curves P-256<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">, and the result is
<o:p></o:p></span></p>
<pre><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif"> > </span><i><span style="font-family:"Calibri Light",sans-serif;color:black">Collecting connection statistics for 30 seconds</span></i><span style="font-family:"Calibri Light",sans-serif;color:black"><o:p></o:p></span></pre>
<p class="MsoListParagraph"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">>
</span><i><span style="font-size:10.0pt;font-family:"Calibri Light",sans-serif;color:black">4137 connections in 14.30s; 289.30 connections/user sec, bytes read 0<o:p></o:p></span></i></p>
<p class="MsoListParagraph"><i><span style="font-size:10.0pt;font-family:"Calibri Light",sans-serif;color:black">> 4137 connections in 31 real seconds, 0 bytes read per connection.<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">I learned from the previous email at
</span><span style="font-family:"Calibri Light",sans-serif"><a href="https://mta.openssl.org/pipermail/openssl-users/2016-June/003951.html">[openssl-users] OpenSSL s_time output meaning</a></span><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif">
, <b><span style="color:black">289.30</span></b><span style="color:black"> is the
</span><b>client CPU time</b><span style="color:black">, and <b>31s</b> is the <b>
total handshake wall clock time</b> for 4137 connections. <b>However it does not give server’s CPU time.<u>
<o:p></o:p></u></b></span></span></p>
<p class="MsoNormal"><b><u><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black"><o:p><span style="text-decoration:none"> </span></o:p></span></u></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black">Please tell how to get CPU time of the server (for ex. in connections/server_sec) if you have some built in command can do that?
<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black">Thank you so much.<b><u><o:p></o:p></u></b></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif;color:black">Yunjie</span><span style="font-size:12.0pt;font-family:"Calibri Light",sans-serif"><o:p></o:p></span></p>
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