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Reordered performance counters and added space for new ones.

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This commit is contained in:
Ross Thompson 2023-03-02 23:04:31 -06:00
parent 724f2634c5
commit 2dd693a3b3
1 changed files with 22 additions and 13 deletions
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35
src/privileged/csrc.sv
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@ -84,20 +84,29 @@ module csrc #(parameter
if(`QEMU) begin: cevent // No other performance counters in QEMU
assign CounterEvent[`COUNTERS-1:3] = 0;
end else begin: cevent // User-defined counters
assign CounterEvent[3] = LoadStallM & InstrValidNotFlushedM; // Load Stalls. don't want to suppress on flush as this only happens if flushed.
assign CounterEvent[4] = BPDirPredWrongM & InstrValidNotFlushedM; // Branch predictor wrong direction
assign CounterEvent[5] = InstrClassM[0] & InstrValidNotFlushedM; // branch instruction
assign CounterEvent[6] = BTBPredPCWrongM & InstrValidNotFlushedM; // branch predictor wrong target
assign CounterEvent[7] = InstrClassM[1] & ~InstrClassM[2] & InstrValidNotFlushedM; // jump and not return instructions
assign CounterEvent[8] = RASPredPCWrongM & InstrValidNotFlushedM; // return address stack wrong address
assign CounterEvent[9] = InstrClassM[2] & InstrValidNotFlushedM; // return instructions
assign CounterEvent[3] = InstrClassM[0] & InstrValidNotFlushedM; // branch instruction
assign CounterEvent[4] = InstrClassM[1] & ~InstrClassM[2] & InstrValidNotFlushedM; // jump and not return instructions
assign CounterEvent[5] = InstrClassM[2] & InstrValidNotFlushedM; // return instructions
assign CounterEvent[6] = BPWrongM & InstrValidNotFlushedM; // branch predictor wrong
assign CounterEvent[7] = BPDirPredWrongM & InstrValidNotFlushedM; // Branch predictor wrong direction
assign CounterEvent[8] = BTBPredPCWrongM & InstrValidNotFlushedM; // branch predictor wrong target
assign CounterEvent[9] = RASPredPCWrongM & InstrValidNotFlushedM; // return address stack wrong address
assign CounterEvent[10] = IClassWrongM & InstrValidNotFlushedM; // instruction class predictor wrong
assign CounterEvent[11] = DCacheAccess & InstrValidNotFlushedM; // data cache access
assign CounterEvent[12] = DCacheMiss; // data cache miss. Miss asserted 1 cycle at start of cache miss
assign CounterEvent[13] = ICacheAccess & InstrValidNotFlushedM; // instruction cache access
assign CounterEvent[14] = ICacheMiss; // instruction cache miss. Miss asserted 1 cycle at start of cache miss
assign CounterEvent[15] = BPWrongM & InstrValidNotFlushedM; // branch predictor wrong
assign CounterEvent[`COUNTERS-1:16] = 0; // eventually give these sources, including FP instructions, I$/D$ misses, branches and mispredictions
assign CounterEvent[11] = LoadStallM & InstrValidNotFlushedM; // Load Stalls. don't want to suppress on flush as this only happens if flushed.
assign CounterEvent[12] = '0 & InstrValidNotFlushedM; // /// ********** store
assign CounterEvent[13] = DCacheAccess & InstrValidNotFlushedM; // data cache access
assign CounterEvent[14] = DCacheMiss; // data cache miss. Miss asserted 1 cycle at start of cache miss
assign CounterEvent[15] = '0; // //// ******* d cache miss cycles
assign CounterEvent[16] = ICacheAccess & InstrValidNotFlushedM; // instruction cache access
assign CounterEvent[17] = ICacheMiss; // instruction cache miss. Miss asserted 1 cycle at start of cache miss
assign CounterEvent[18] = '0; // //// ******** i cache miss cycles
assign CounterEvent[19] = '0; // ******** CSR writes
assign CounterEvent[20] = '0; // ******** fence.i
assign CounterEvent[21] = '0; // ******** sfence.vma
assign CounterEvent[22] = '0; // ******** # interrupts
assign CounterEvent[23] = '0; // ******** # exceptions
assign CounterEvent[24] = '0; // ******** # division cycles
assign CounterEvent[`COUNTERS-1:25] = 0; // eventually give these sources, including FP instructions, I$/D$ misses, branches and mispredictions
end
// Counter update and write logic