3.2 Sampling Report Data

RSIML reports data on the three modes for use in tuning and to confirm that simulation is proceeding as expected. The report data will be described using the following example.

     ZA: Simulated 745649 instr taking 219650 cycles in 2 samples.
     ZB: Host cpu time 3.41 s
     ZC: Functional 1744488 insn, 0.14 s, 12462498 insn/s
     ZD0: Skip        1744488 insn,      0.14 s, 12374098 insn/s.
     ZD1: Warmup        29624 insn,      0.39 s,    75390 c-insn/s.
     ZD2: Sample       100003 insn,      2.59 s,    38662 c-insn/s, 288273 d-insn/s.
     ZD3: Coverage 0.053360 unweighted, 0.133401 weighted.

Line ZA shows the number of instructions decoded in sample mode, the total duration of the samples, and the number of samples.

Line ZC shows the number of instructions handled in functional simulation mode. This includes the instructions in skip mode and if the simulator is in trace mode, also includes instructions in warmup and sample modes.

Line ZD0 shows the number of instructions in skip mode, the amount of time the host spent in skip mode (in seconds), and the skip-mode simulation rate in instructions per second. Lines ZD1 provides similar information for warmup mode, and ZD2 for sample mode. In sample mode the number of decoded instructions per second is also shown. Note that skip mode is much faster than warmup and trace modes.

Line ZD3 shows unweighted coverage, the fraction of benchmark instructions that were simulated in sample mode. A 1 would indicate the entire benchmark. Also shown is weighted coverage which for targeted sampling includes the values of the weights.