Date: | Wed, 6 Jul 2011 13:10:50 +0800 (CST) |
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From: | jianhual@xxxxxxxxxxxxxxxx |
Subject: | Re: [Gems-users] How to collect multicore coherence traffic |
Hi John, Sorry for trouble! I checked your reply information and it seems that it's not the thing I want. Thank you, Let me clarify my question: For a multicore platform running multithreaded programs, I want to collect the traffic trace for cores which means to export the core's traffic trace into a trace file. The format of the trace file is something like follows. The format of the trace file for a 16-core CMP system ---------------------------------------------------------------------------------- 1 U rd 0 1 16 0xa01280 1 U rd 1 15 16 0xb6fb80 1 U rd 2 1 16 0xa01280 1 U rd 3 1 16 0xa01280 1 U rd 4 1 16 0xa01280 1 U rd 5 1 16 0xa01280 1 U rd 6 1 16 0xa01280 1 U rd 7 1 16 0xa01280 1 U rd 8 1 16 0xa01280 1 U rd 9 1 16 0xa01280 1 U rd 10 1 16 0xa01280 1 U rd 11 1 16 0xa01280 1 U rd 12 1 16 0xa01280 1 U rd 13 1 16 0xa01280 1 U rd 14 1 16 0xa01280 1 U rd 15 1 16 0xa01280 --The first field is the injection time stamp. --The second field is the message type – this is either a U for unicast and an M for multicast (multicast means that write-caused write-invalidate in directory based cache coherence protocols) --The third field relates to the type of coherence message such as read, write --The fourth field is the source --The fifth field is the destination (when the message type is M, this is a bit vector represented as a hex number; for unicast it will only be destinations from 0 to 15) --The sixth field is the message size in bytes --The seventh field is the memory address -------------------------------------------------------------------------------------- Wish someone can help me on this issue. I just want to know how and where to implement such function in GEMS framework. Thanks in advance! Regards, Jianhua |
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