>From a simulation standpoint, no, there isn't a limit. When you choose a device ini file, it sets the density for each DRAM device and the storage per rank. So if you wanted a very large memory system with a low density DRAM device, the simulator would just give you many ranks per channel. However, many ranks per channel are not really feasible in real life (2-8 ranks per channel is common depending on the DIMM and speed grade).
I wish we could figure out further what is wrong with a single channel configuration -- I hope it's not a bug. -Paul On Fri, May 10, 2013 at 4:58 PM, Seyed Majid Zahedi < [email protected]> wrote: > Paul, > > I increased the number of channels to two, and was able to simulate for 8G > of RAM. > Is there any limitation on the capacity that each channel can handle? > > Best, > Seyed > > > > On 05/07/2013 11:54 PM, Paul Rosenfeld wrote: > > That's rather odd. The marss.dramsim branch is a bit out of date with > respect to marss HEAD -- perhaps that's the problem? The DRAMSim2 code is > so deep in the simulation code of marss that it shouldn't have a direct > impact on something like launching QEMU. > > I have been meaning to push out a bunch of changes but I'm currently > busy working on other things. > > > On Mon, May 6, 2013 at 5:23 PM, seyed <[email protected]> wrote: > >> Hi, >> >> I'm trying to simulate a machine with more than 4G memory size. >> running 'free -m' on my own machine gives me: >> total used free shared buffers cached >> Mem: 64419 18475 45943 0 366 7571, >> which means that I have enough memory on my own machine to launch qemu >> with >> more than 4G memory. >> I tried 20G memory size with marss (without DRAMSim2), and it works. >> However, running the same config with marss.dramsim doesn't work. >> Actually, it gets stuck after redirecting to /dev/pts/*. >> I also tried 8G and 12G, but non of them worked for me. >> Does anyone have the same experience? >> >> Best, >> Seyed >> >> >> _______________________________________________ >> http://www.marss86.org >> Marss86-Devel mailing list >> [email protected] >> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >> > > >
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