Hi Shehab, If you're using FS mode, the question you need to ask yourself is "How would hardware be able to determine the logical thread id?" As far as I know, there are not magic instructions, etc. implemented in gem5 to get the logical thread ID. You may be able to leverage the ASID that is passed to the TLB and/or the page table pointer. It depends on the ISA you're using, though.
Cheers, Jason On Thu, Jan 10, 2019 at 8:53 AM Shehab Elsayed <shehaby...@gmail.com> wrote: > Hello All, > > I was wondering if there is a way to differentiate between different > logical (software) threads in gem5. I am trying to collect some stats for > each logical thread and so far all I could find in gem5 is access to > physical threads. I know that logical threads is the responsibility of the > OS but is there anyway for gem5 to access the logical thread ID. > > One option is to pin threads to cores but this only works if the number of > cores is at least equal to the number of logical threads. However, I will > need to run some experiments where the number of logical threads exceed the > number of cores, in which case, multiple logical threads will be assigned > to the same core and in order to differentiate between them I need the > logical thread ID. > > Thank you very much in advance. > > Best Regards, > Shehab > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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