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<p class="MsoNormal"><span lang="EN-US">Hi, Dear Lttng Expert<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I am a beginner of the great tool: Lttng. We haven’t so much target board memory for it. So I have some questions as below, could you please help me, thanks!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Could Lttng support transmit trace to host PC in a “live mode” or “fly mode” now? So as to reduce the buffer size requirement on the target board.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> BTW, I read some material mentioned:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.5pt;font-family:"MyriadPro-Regular","sans-serif"">The discard mode is used by default. In this mode, new trace data arriving to a full buffer are discarded.
<b><span style="color:red">In overwrite mode, the oldest trace data in the buffer are discarded. This mode is also known as flight-recorder mode.
</span></b>Note however, that this refers to the <b><span style="color:#558ED5">internal buffers</span></b>, not to the<b><span style="color:#558ED5"> trace log storage</span></b>. The discarding of events is marked in the trace log and can be noticed when
the trace is analyzed. In this way the user can interactively adjust his trace settings.</span><span lang="EN-US" style="font-size:9.5pt;font-family:TimesNewRomanPSMT"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> What is the difference between “</span><b><span lang="EN-US" style="font-size:9.5pt;font-family:"MyriadPro-Regular","sans-serif";color:#558ED5">internal buffers</span></b><span lang="EN-US">” and “</span><b><span lang="EN-US" style="font-size:9.5pt;font-family:"MyriadPro-Regular","sans-serif";color:#558ED5">trace
log storage</span></b><span lang="EN-US">”? Could the trace log storage be located in the host PC? For example: the target board transmit the trace to Host PC via TCP/UDP, and only a very little internal flight-recorder buffer is required in the target device.
Is it feasible?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">BR&Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">XiangHao<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-------------------------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ALCATEL-LUCENT SHANGHAI BELL<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">No.255 Guiqiao Road, Pudong, Shanghai, China<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ZIP: 201206 <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">OnNET: 2783.7051 <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Phone: +86.21.38563888.7051<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Fax : +86.21.38563400<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="mailto:Hao.Xiang@alcatel-sbell.com.cn">Hao.Xiang@alcatel-sbell.com.cn</a><o:p></o:p></span></p>
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