[gem5-users] How to run SE on multicores to speedup simulation ?
Dear gem5 community members, I am playing the DRAM simulation with configs/dram/sweep.py on my 12 core CPU workstation. However I found gem5 is running on only one of the 12 cores. It there a way to run the simulation on multiple cores to speedup the process and how ? Best regards. Thanks, Kevin Yuan ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] How to run SE on multicores to speedup simulation ?
Hi yuan, Gem5 is a single thread application. So there’s no way to speed up gem5 with increasing number of core. On Sat, Aug 31, 2019 at 12:30 PM Yuan Kevin wrote: > Dear gem5 community members, > > I am playing the DRAM simulation with configs/dram/sweep.py on my 12 core > CPU workstation. > > However I found gem5 is running on only one of the 12 cores. > > It there a way to run the simulation on multiple cores to speedup the > process and how ? > > Best regards. > > > Thanks, > > > Kevin Yuan > ___ > 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
Re: [gem5-users] How to run SE on multicores to speedup simulation ?
On 8/31/2019 12:42 PM, Abhishek Singh wrote: Hi yuan, Gem5 is a single thread application. So there’s no way to speed up gem5 with increasing number of core. I'll just add that doing parallel simulation, especially if timing is involved, requires a lot of synchronization. One can imagine doing optimistic run-ahead, possibly tuning the degree of optimism dynamically, etc., but I think such a system would be pretty complex, and it's not clear how much benefit you would get after dealing with the overheads. Anyway, IMO it would require designing a system that way from the start. Still, I admit I am not familiar with the low-level scheduling "guts" of Gem5, which is a key part that would need to change. However, to do well, one would need to know how different components depend on various pieces of state in order to determine what might run in parallel, etc. Regards - Eliot Moss ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
