Hi Jason, Sadly removing that flag didn't make a difference. I'm still getting an mmap warning (when running it with sudo). I also tried removing the flag (-DM5OP_ADDR=0xFFFF0000) from util/m5/Makefile.x86, but it made no difference. I'm gonna post my changes in case someone is interested.
This is the microbenchmark. https://filebin.net/cb5jsu1fakpdo163/gem5_array.pdf?t=d6gmvy5e This are the instructions I'm following (heavily based on the blogpost) https://filebin.net/cb5jsu1fakpdo163/instructions.pdf?t=d6gmvy5e And finally these are the changes (diff) that I made in gem5 for implementing the pseudo instructions. (I know the pseudo instructions don't do anything currently. I'm just trying to get them to work before implementing any functionality.) https://filebin.net/cb5jsu1fakpdo163/diff.pdf?t=d6gmvy5e Thanks. On Thu, 13 Jun 2019 at 11:40, Jason Lowe-Power <ja...@lowepower.com> wrote: > Hi Victor, > > Drop the -DM5OP_ADDR define when you're compiling. That will force the > m5ops to use the pseudo instruction implementation instead of the MMIO > implementation. MMIO is required when using KVM, but no other time. > > Cheers, > Jason > > On Wed, Jun 12, 2019 at 2:38 PM Victor Kariofillis < > vickariofil...@gmail.com> wrote: > >> Hi Andrea, >> >> I can't get my microbenchmark to run with gem5. If I execute it without >> sudo, I get a "Can't open /dev/mem: Permission denied". If I execute it >> with sudo on its own, it seems to finish fine. But when I want to execute >> it with gem5, I get a segfault. >> >> "warn: mmap: writing to shared mmap region is currently unsupported. The >> write succeeds on the target, but it will not be propagated to the host or >> shared mappings >> warn: mmap: failed to map file into host address space >> panic: Tried to read unmapped address 0x55ff. >> PC: 0x400879, Instr: MOV_R_M : ld rax, DS:[rax + r11] >> Memory Usage: 678516 KBytes >> Program aborted at tick 86427000" >> >> I built my microbenchmark like this: >> >> 1) gcc -O2 -DM5OP_ADDR=0xFFFF0000 -Ipath/to/gem5/include -c >> gem5_array.cpp -o gem5_array.o >> 2) gcc gem5_array.o -o gem5_array path/to/gem5/util/m5/m5op_x86.o >> path/to/gem5/util/m5/m5_mmap.o >> >> I don't only want to get the stats for the ROI in the stats file. I'm >> using some debug flags, so in the output of gem5, I want to see only the >> printouts from inside the ROI. I'm not sure I would achieve that. >> >> Thanks, >> Victor >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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