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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#1F497D'>Anyone can answer our questions? Mathieu?<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Bingfeng.Zhao@emc.com [mailto:Bingfeng.Zhao@emc.com] <br><b>Sent:</b> Wednesday, July 18, 2012 5:54 PM<br><b>To:</b> lttng-dev@lists.lttng.org<br><b>Subject:</b> [lttng-dev] some questions on lttng<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>Hello the dev list,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>We encounter some basic questions when try to adapt the LTTNG in our poject. <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:"Verdana","sans-serif"'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Verdana","sans-serif"'>When the trace is enabled and all are well configurated, we get trace messages collected under the session folder. The question is whether it is possible that some traces will lost when the trace messages are huge. How will LTTNG do if the consumer deamon cannot fast enough to copy the trace message from trace buffer?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:"Verdana","sans-serif"'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Verdana","sans-serif"'>For user space trace, currectly seems we cannot set the flush interval. How can we control the flush internal for UST? If no, is there hardcoded or random flash interval? Or there is no time based flush mechanism at all for UST?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:"Verdana","sans-serif"'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-family:"Verdana","sans-serif"'>For a severe kernel panic can we extrace buffered trace messages from LTTNG internal buffer in full memory core dump file? Is there tools on this we can leverage?<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>Thank you,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Verdana","sans-serif"'>- Bingfeng<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>