From the edge profile you can get count of any basic block (CFG node) or any
instruction inside this basic block. Edge profile is used in -Xem:server mode only. You can get count of any instruction in the optimizer during SD2_OPT JIT recompilation stage:
inst->getNode()->getExecCount() Is that what you need? Thanks, Pavel On 2/27/07, Estelle Liu <[EMAIL PROTECTED]> wrote:
Thank you very much for your help! And there's one more question: If I wanna get a counter to keep track of some certain instruction in loop and reuse its result later, can EdgeMethodProfiler help? 2007/2/27, Naveen Neelakantam <[EMAIL PROTECTED]>: > > EBMethodProfile is an Entry and Backedge profile. I think in > practice it is used by JET and has one counter that keeps track of > the number of times a method has been entered and has one counter > that keeps track of the number of times any backedge has been > executed in a method. If either counter exceeds a threshold, > recompilation is triggered > > EdgeMethod profile is an edge profiler. It instruments method entry > and CFG edges to collect the profile (edge_instrument). If any edge > exceeds a backedge threshold or the entry counter exceeds an entry > threshold, recompilation is triggered. During recompilation the edge > annotation (edge_annotate) pass can be used to annotate the CFG with > the collected edge profile. See server.emconf for an example of how > to use edge_instrument and edge_annotate. > > Also, you might want to look here: > http://harmony.apache.org/subcomponents/drlvm/EM.html#PC > http://harmony.apache.org/subcomponents/drlvm/emguide.html > > Hope that helps! > > Naveen > > > On Feb 26, 2007, at 8:42 PM, yuyu liu wrote: > > > Hi, I can't get the differences between EBMethodProfile and > > EdgeMethodProfile.In which occassions and by what means do they > > work?And > > how to start any of them? > > -- Estelle
