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<DIV>There are only two places where I can put the 'LOCK' and 'UNLOCK':
'SCHED_EVENTS' and 'IPI_EVENTS'. Neither one of them can trace the
lock-related overheads for there are both 0 of the LOCK and UNLOCK in
the counts.csv. That means I haven't got the trace data of the LOCK and
UNLOCK.</DIV>
<DIV> </DIV>
<DIV>So when I using the DPCP, how can I trace the lock and unlock
overheads?</DIV>
<DIV>1. Add these events inside the 'ft-trace-overheads' (how can I decide
add them to SCHED_EVENTS or IPI_EVENTS)</DIV>
<DIV>2. What the meaning of 'BE_EVENTS' in 'ft-extract-samples'</DIV>
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<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: Verdana; COLOR: #c0c0c0"
align=left>2016-09-19
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<SPAN id=_FlashSignName>shijunjie92</SPAN> </DIV>
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<BLOCKQUOTE id=ntes-flashmail-quote
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<DIV><STRONG>发件人：</STRONG>Björn Brandenburg <bbb@mpi-sws.org></DIV>
<DIV><STRONG>发送时间：</STRONG>2016-09-19 11:13</DIV>
<DIV><STRONG>主题：</STRONG>Re: [LITMUS^RT] trace overheads</DIV>
<DIV><STRONG>收件人：</STRONG>"litmus-dev"<litmus-dev@lists.litmus-rt.org></DIV>
<DIV><STRONG>抄送：</STRONG></DIV>
<DIV> </DIV>
<DIV>
<DIV> </DIV>
<DIV>> On 19 Sep 2016, at 12:05, shijunjie92 <shijunjie92@gmail.com> wrote: </DIV>
<DIV>> </DIV>
<DIV>> Hello all: </DIV>
<DIV>> </DIV>
<DIV>> When I trying to trace the 'LOCK and UNLOCK' overheads, I add 'LOCK' and 'UNLOCK' into the 'IPI_EVENTS' of 'ft-trace-overheads’. </DIV>
<DIV> </DIV>
<DIV>Why add them to IPI_EVENTS? LOCK and UNLOCK are not IPI events, no? </DIV>
<DIV> </DIV>
<DIV>> But when I do the step 'ft-select-samples counts.csv combined-overheads_*.float32 2>&1 | tee -a overhead-processing.log', errors occurs '[EE] Cutoff for UNLOCK is zero.[EE] Cutoff for LOCK is zero.’. </DIV>
<DIV> </DIV>
<DIV>That means that you have some trace files that don’t contain any LOCK/UNLOCK samples; counts.csv lists 0 for these events. Please consult the source code of ft-select-samples. </DIV>
<DIV> </DIV>
<DIV>The shuffling is not needed during debugging, only once you start collecting valid data. You should debug your implementation and workflow before shuffling/subsampling traces. </DIV>
<DIV> </DIV>
<DIV>- Björn </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>_______________________________________________ </DIV>
<DIV>litmus-dev mailing list </DIV>
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