Karthik, This assertion: ooo::ReorderBufferEntry::commit(): Assertion `ctx.get_cs_eip() == uop.rip' failed.
is a long-living bug in the current MARSS code. I believe it may been linked to SMT-based configurations, but I have not had the time to look into it. If your simulated machine uses SMT, can you try disabling SMT and please regenerate checkpoints and try again? As for your second question, MARSS is definitely suited to giving your more statistics than other options (i.e., instrumenting the kernel, using hardware/machine counters, etc.). If you need detailed, hardware-level statistics relating to lock contention, you can easily instrument the MARSS code base with some heuristics/counters that suit your research. Tyler > Hi, > > I am trying to use MARlSS for analyzing lock contention in > multi-threaded apps and in linux OS code. I have successfully built > the simulator and able to simulate the cores. Some of the questions I > have are: > > 1) When I try to run MARSS configured with large number of cores(e.g > 32), the simulation is very slow. From the discussion here > "http://article.gmane.org/gmane.comp.emulators.marss86/112/match=enable+kvm"; > I get that atleast for creating checkpoints we can use KVM which will > be much faster. But I do not understand where should we enable the > KVM? I tried the following: > > $ qemu/qemu-system-x86_64 -enable-kvm -m [memory_size] -hda > [path-to-qemu-disk-image] > > Then in qemu monitor mode I configured the simulator as follows: > simconfig -run -machine private_L2 > > But shortly after the simulator starts I get the following error: > qemu-system-x86_64: ptlsim/build/core/ooo-core/ooo-pipe.cpp:2054: int > ooo::ReorderBufferEntry::commit(): Assertion `ctx.get_cs_eip() == > uop.rip' failed. > > Can someone point me what I miss here and what Avadh was talking about > enabling KVM? > > 2) From the mailing list discussion > (http://www.mail-archive.com/marss86-devel%40cs.binghamton.edu/msg01882.html) > I see that MARSS runs the cores concurrently. Hence I believe MARSS > can simulate the lock contentions in both application & OS code needed > for my research. Kindly let me know your comments for confirmation. > > Thanks for your time, > karthik > > _______________________________________________ > http://www.marss86.org > Marss86-Devel mailing list > [email protected] > https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel > _______________________________________________ http://www.marss86.org Marss86-Devel mailing list [email protected] https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel
