That sounds great. In the meantime I will work a bit more on the SE mode. Also do you have any inputs on the following ?
m5threads: If there are 9 CPU, and the host CPU launches 9 threads, then are 8 threads launched on the remaining 8 CPUs and the 9th thread has to wait for a thread to complete to begin execution. If not then where does it run as all the 9 CPUs are currently running a thread (1 host + 8 threads). Thank you, John Smith On Fri, Apr 16, 2021 at 12:58 PM Jason Lowe-Power <ja...@lowepower.com> wrote: > Soon! https://gem5.atlassian.net/browse/GEM5-195 > > We're hopeful that in the next month or so all of this code will be public. > > Cheers, > Jason > > On Fri, Apr 16, 2021 at 9:55 AM John Smith <jjsmith2...@gmail.com> wrote: > >> Will I also be able to run the GPU model in the FS mode ? >> >> On Fri, Apr 16, 2021 at 11:39 AM Jason Lowe-Power <ja...@lowepower.com> >> wrote: >> >>> Hi John, >>> >>> I suggest using full system mode instead of SE mode if you're running a >>> multithreaded workload. In FS mode, there's a full OS so it can handle >>> thread switching, etc. For Parsec on x86 we've created a set of resources >>> for you to get started. See >>> https://gem5.googlesource.com/public/gem5-resources/+/refs/heads/stable/src/parsec/ >>> for details. >>> >>> Cheers, >>> Jason >>> >>> On Fri, Apr 16, 2021 at 8:07 AM John Smith via gem5-users < >>> gem5-users@gem5.org> wrote: >>> >>>> Hi All, >>>> >>>> I am sorry for the confusion. >>>> >>>> I am looking to run a multithreaded application on a mesh of 3x3 CPUs, >>>> where the benchmark spawns 9 threads and each thread runs on >>>> a single CPU (1:1). I went through the past discussions on this mailing >>>> list and saw that m5threads was needed to do this. I have some questions. >>>> >>>> (1) If there are 9 CPU, and the host CPU launches 9 threads, then are 8 >>>> threads launched on the remaining 8 CPUs and the 9th thread has to wait for >>>> a >>>> thread to complete to begin execution. If not then where does it run as >>>> all the 9 CPUs are currently running a thread (1 host + 8 threads). >>>> >>>> (2) Anthony Gutierrez said that m5threads is no longer needed. Is that >>>> correct for gem5-21 ? >>>> (Subject: Simulating multiprogrammed & multithreaded workloads in >>>> SE mode?) >>>> >>>> (3) Right now I am trying to build PARSEC 3.0 benchmarks with >>>> m5threads, but I am receiving some errors as follows and I am not sure why: >>>> >>>> >>>> >>>> >>>> >>>> *base_dir/local/gcc/bin/gcc -O3 -g -funroll-loops >>>> -fprefetch-loop-arrays base_dir/gem5dev/parsec-3.0/pkgs/pthread.o >>>> -static-libgcc -Wl,--hash-style=both -Wl,--as-needed >>>> -DPARSEC_VERSION=3.0-beta-20150206 -o siman_tsp siman_tsp.o -L >>>> base_dir/local/gcc/lib64 -L base_dir/local/gcc/lib ./.libs/libgslsiman.a >>>> ../rng/.libs/libgslrng.a ../ieee-utils/.libs/libgslieeeutils.a >>>> ../err/.libs/libgslerr.a ../sys/.libs/libgslsys.a ../utils/.libs/libutils.a >>>> -lpthread -lmbase_dir/gem5dev/parsec-3.0/pkgs/pthread.o: In function >>>> `__pthread_initialize_minimal':pthread.c:(.text+0x97): undefined reference >>>> to `_dl_phdr'pthread.c:(.text+0xd9): undefined reference to `_dl_phnum'* >>>> >>>> Generally how should I go about integrating the m5thread with any >>>> benchmark? >>>> >>>> (4) Also, what other CPU benchmarks are recommended which are >>>> multithreaded and can be run in a manner where I can >>>> launch a thread on each CPU ? >>>> >>>> Thank You, >>>> John Smith >>>> >>>> <https://www.mail-archive.com/search?l=gem5-users@gem5.org&q=from:%22Gutierrez%2C+Anthony%22> >>>> >>>> On Fri, Apr 16, 2021 at 1:50 AM Gabe Black via gem5-users < >>>> gem5-users@gem5.org> wrote: >>>> >>>>> That's essentially right, although gem5 does have some plumbing to run >>>>> multiple event queues within the same simulation which can coordinate with >>>>> each other within a small window (quantum) of time. gem5 has support for >>>>> fibers/threads/coroutines, but these are not typically used to model >>>>> events. Events are processed inline when they happen using a simple >>>>> function call. >>>>> >>>>> Gabe >>>>> >>>>> On Thu, Apr 15, 2021 at 2:46 AM gabriel.busnot--- via gem5-users < >>>>> gem5-users@gem5.org> wrote: >>>>> >>>>>> Hi John, >>>>>> >>>>>> Short answer : no, you can only run several simulations in parallel, >>>>>> but not a single simulation using one thread per CPU. >>>>>> >>>>>> Gem5 relies on Discrete Event Simulation (DES) to simulate the >>>>>> concurrent behavior of HW. >>>>>> DES is intrinsically sequential in its execution as it relies on >>>>>> coroutines (also called user user threads, greed threads, fibers, etc.). >>>>>> Parallelizing such application is a very hard task that often >>>>>> requires a lot of subtle code transformations to efficiently protect >>>>>> shared >>>>>> resources. >>>>>> If done correctly, then parallel DES does not have all the good >>>>>> properties of classic DES, especially determinism... Unless you add extra >>>>>> care to preserve it, which is hard, too. Trust me ;). >>>>>> >>>>>> This question has been discussed back in the days but seems stalled >>>>>> now: http://www.m5sim.org/Parallel_M5 >>>>>> >>>>>> Cheers, >>>>>> Gabriel >>>>>> _______________________________________________ >>>>>> gem5-users mailing list -- gem5-users@gem5.org >>>>>> To unsubscribe send an email to gem5-users-le...@gem5.org >>>>>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>>>>> >>>>> _______________________________________________ >>>>> gem5-users mailing list -- gem5-users@gem5.org >>>>> To unsubscribe send an email to gem5-users-le...@gem5.org >>>>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>>> >>>> _______________________________________________ >>>> gem5-users mailing list -- gem5-users@gem5.org >>>> To unsubscribe send an email to gem5-users-le...@gem5.org >>>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>> >>>
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