The PCEventQueue in src/cpu/pc_event.hh allows you to trigger events on the execution of particular PCs. The difficulty of course is mapping source code to PCs. You would also not be able to pass any data to the event.
Using an m5op would incur some small overhead for fetching & executing the op as well as setting up the arguments, but would be a lot easier to manage. Steve On Fri, Jan 10, 2020 at 3:00 PM Ciro Santilli <ciro.santi...@gmail.com> wrote: > You could hack up custom m5op magic instructions easily by copying > existing ones, but I think it still takes up a memory fetch/decode. > > Better than that, only if you hack a way to do something when a given > PC is reached. Maybe have a look at how Linux detects panics by > reading the PC of the panic symbol and try to adapt something similar. > > On Fri, Jan 10, 2020 at 6:44 PM Subhankar Pal <s...@umich.edu> wrote: > > > > Hi! > > > > I am trying to profile code in detail running on a MinorCPU in SE mode. > I'd like to add profiling instructions into my code, whose execution > shouldn't affect the timing and the code should take the same time to run > as it would without those instructions. At minimum, the profiling > instruction should print the current Tick, memObject name and a word of > data that I pass use as an argument to call it with. Right now, I'm > approximating this by doing a store to a special address that causes the > minorCPU to throw the desired print. However, this method is not > 0-overhead. Does anyone have better suggestions? > > > > Thanks in advance! > > > > Subhankar Pal | PhD Candidate, CSE | University of Michigan > > _______________________________________________ > > gem5-users mailing list > > gem5-users@gem5.org > > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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