On 5/6/21 10:47 AM, FARIDEH ZIAEE via gem5-users wrote:
Hi,
I have the following questions about simulation statistics:
final_tick 9724380737064
host_inst_rate 79246
host_mem_usage 1185244
host_op_rate 87406
host_seconds 68211.69
host_tick_rate 129205119
sim_freq 1000000000000
sim_insts 5405536979
sim_ops 5962076897
sim_seconds 8.813299
sim_ticks 8813298942669
What is the difference between host_seconds and sim_second?
host_seconds is real world time spent simulating on your workstation,
sim_second is how much time was simulated : it took 68211 seconds to
simulate 8.8 seconds
Which one is used to run time(execution time) between host_second and
sim_second?
Not sure I understand but any performance metric or the simulated system
will use sim_second. host_second is only helpful to gauge the speed at
which gem5 simulates (KIPS/MIPS)
What is the difference between final_tick and sim_ticks?
sim_ticks is how many ticks were simulated (so it should be equal to
sim_seconds * ticks_per_second). final_tick is the value of curTick()
when simulation exited. If you start from tick 0, then final_tick and
sim_ticks should be the same (I think), but if you restore from a
checkpoint they will differ for sure.
What do these parameters(host_inst_rate , host_op_rate ,
host_tick_rate , sim_freq , sim_insts ) mean?
host_inst_rate is how many instructions gem5 simulates per second
(79KIPS). host_op_rate is the same but for uops (one instruction can be
expanded to multiple uops). host_tick_rate is the same but for ticks
(essentially, one unit of simulated time takes how many real world units
of time to be processed).
sim_freq is clockspeed you are running at
sim_insts is how many instructions were simulated (pretty self
explanatory imho).
Arthur
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