Hi,
At /src/cpu/o3/cpu.cc we can see that the IPC is defined like this:
totalIpc
.name(name() + ".ipc_total")
.desc("IPC: Total IPC of All Threads")
.precision(6);
totalIpc = totalCommittedInsts / numCycles;
But, according to a previous post on the list (
http://comments.gmane.org/gmane.comp.emulators.m5.users/11513), "*numCycles*"
accounts for only busy CPU cycles, so shouldn't IPC be either
"*totalCommittedInsts
/ (numCycles+idleCycles)*" or "*totalCommittedInsts /
(numCycles+idleCycles+quiescCycles)*" ?
If my understanding is correct, using the current formula may lead to
similar IPCs for tasks with very different cache miss rates for instance.
Thanks.
_______________________________________________
gem5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
