Hi Prof, Thanks a lot for your response. Is there any update regarding this ticket? https://gem5.atlassian.net/browse/GEM5-332
Correct me if I'm wrong, but I think your response implies that the hyperthreading is implemented by maybe not tested. If so, this is confusing me a bit, given the link I included above. I forgot to mention that I am using x86. Thanks. -- *Best,Abdelrahman Hussein* MSc. Student -- Graduate RA/TA School of Computing Sciences Simon Fraser University, Canada On Thu, Sep 8, 2022 at 7:51 AM Jason Lowe-Power <ja...@lowepower.com> wrote: > Hello, > > In this case "Thread" means hardware context in the CPU (e.g., Intel > hyperthreads), not *core*. > > Have you configured your O3CPU to have 8 hardware contexts? > > I'll give a few short pointers: > 1. SPEC is single threaded (unless running SPEC rate), so there may not be > other software threads executing on the system > 2. Multithreaded cores are not tested at all in gem5. They may work, or > they may not. > 3. I have never seen anyone try to use more than two hardware contexts in > a core in gem5. I wouldn't be surprised if 8 hardware contexts have never > been tested. > > To debug this, I would probably start by having multiple CPU cores and > making sure things work as expected. If so, then I would try 2 threads per > core to see if it works, then go to 4 or 8. > > Cheers, > Jason > > On Thu, Sep 8, 2022 at 2:55 AM Abdelrahman S. Hussein < > abdelrahman.sob...@gmail.com> wrote: > >> Hello, >> >> I am running a multithreaded workload on the O3 CPU in Full System Mode. >> The workload is SPEC OMP. I am running from a checkpoint that was taken in >> the middle of running the benchmark. I am using the following debugging >> flags to monitor the system >> Thread,Faults,Fetch,O3CPU >> >> However, looking at the debugging file, I always see that the fetcher >> only fetches from tid: 0, which means the CPU does not switch to any other >> Thread at all. I am sure that my workload runs on 8 threads (cooperating >> threads). >> >> So, does this mean that gem5 does not support running multithreaded >> workloads? Or, am I missing something or watching the wrong debug prints? >> >> Thanks. >> >> -- >> >> *Best,Abdelrahman Hussein* >> MSc. Student -- Graduate RA/TA >> School of Computing Sciences >> Simon Fraser University, Canada >> _______________________________________________ >> gem5-users mailing list -- gem5-users@gem5.org >> To unsubscribe send an email to gem5-users-le...@gem5.org >> > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org >
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