Ziqi Wang issues

Results 5 issues of


                                            Ziqi Wang

It's Intolerably Slow (Sorry about the previous wording...)

1. Start a step-by-step decomposition of the performance numbers, by removing concurrency features and see how performance changes. Ideally after we have removed everything, i.e. CAS, mapping table, delta chain,...

Need a resizable mapping table

Currently the mapping table is just a huge fix sized array built into BwTree object (which makes a super heavy object). If NodeID overflows then the entire data structure must...

Delete() is neither wait-free nor excetion-safe

Because of the InnerAbortNode machanism, if a thread is killed between posting and removing InnerAbortNode on the parent, then the key space below it is totally blocked from writing (but...

OOOCore RF Read Simulation

In ooo_core.cpp line 219 - 220 (https://github.com/s5z/zsim/blob/master/src/ooo_core.cpp#L219-L220), it says: ``` // if srcs are not available at issue time, we have to go thru the RF curCycleRFReads += ((c0 <...

Possible Typo in virt/timeout.cpp

I found a possible typo in [virt/timeout.cpp](https://github.com/s5z/zsim/blob/master/src/virt/timeout.cpp#L131-L139), line 131: `int res = (int)PIN_GetSyscallNumber(ctxt, std);` I suspect the correct PIN interface to call should be `PIN_GetSyscallReturn`, because later on in line...