gem5

问题 I've already got Gem5 installed. I'm trying to do a full system simulation. I added M5_PATH echo "export M5_PATH==/home/sam/security/gem5/full/" >> ~/.bashrc I put all the system image and config files under following directory: :~/security/gem5/full$ ls binaries configs config-x86.tar.bz2 disks x86-system.tar.bz2 x86-system.tar.bz2.1 I changed the path in the SysPaths.py file to following: paths = [ '/dist/m5/system', 'full' ] And updated the following line in Benchmark.py return env.get(

问题 I am an undergraduate student working on my thesis about parallel programming. I am using OpenMP model. Now i want to use gem5 for measure performance. That's why i install gem5 Full System successfully by following link: http://cearial01.kaist.ac.kr/index.php/2016/08/26/gem5-documentation/ Now i want to compile & run a c program with OpenMP (matmul.c) using gem5. How can i compile & run this program? I mean inside which folder i stored this program file (matmul.c) for compile? How i create

问题 I want to play around with cache sizes in my gem5 simulator to see how it affects performance of programs, and possibly tune programs at runtime. As a sanity check, I tried to check that the command lines arguments I used were working , and so I tried the various methods proposed at: https://superuser.com/questions/55776/finding-l2-cache-size-in-linux/1298808#1298808 cat /sys/devices/system/cpu/cpu0/cache/index2/size getconf LEVEL2_CACHE_SIZE But I observed that: the file /sys/devices/system

问题 I am having the following error in gem5. This happens in ARM only. With X86 I see some syscalls being ignored but none causing a fatal error. tomas@ubuntu:~/gem5$ ./build/ARM/gem5.opt configs/example/arm/starter_se.py ../tests_gem5/hello gem5 Simulator System. http://gem5.org gem5 is copyrighted software; use the --copyright option for details. gem5 compiled Jul 9 2018 17:09:01 gem5 started Jul 9 2018 18:07:37 gem5 executing on ubuntu, pid 5064 command line: ./build/ARM/gem5.opt configs

问题 Related to this other question. I am trying to run this simple C program in gem5: int main() { int a=1, b=2; int c=a+b; return c; } And it fails because gem5 doesn't have some syscalls implemented. My question is, why would a simple program like this require syscalls? This should run bare-metal without trouble. Is there a way to compile this to avoid syscalls? I am using arm-linux-gnueabi-gcc -static -DUNIX to compile it. 回答1: Without syscalls the program cannot exit. The way it works is

问题 Related to this other question. I am trying to run this simple C program in gem5: int main() { int a=1, b=2; int c=a+b; return c; } And it fails because gem5 doesn't have some syscalls implemented. My question is, why would a simple program like this require syscalls? This should run bare-metal without trouble. Is there a way to compile this to avoid syscalls? I am using arm-linux-gnueabi-gcc -static -DUNIX to compile it. 回答1: Without syscalls the program cannot exit. The way it works is

问题 Since syscall emulation is much easier to setup, I'm wondering what are the advantages of using the full system emulation when running an userland program. Or in other words, what interesting aspects are modeled in the full system but not syscall emulation mode, and when are they significant? It is mentioned in the docs at: http://gem5.org/Splash_benchmarks that full system is Realistic: you're getting the actual Linux thread scheduler to schedule your threads Is this the only advantage, or

问题 I know it's possible to run Java workbenches on Gem5 (http://www.gem5.org/Main_Page) simulator for ARM architecture. I want to run a simulation of a Java application on ISA x86, is this possible? Thanks for helping me. 来源： https://stackoverflow.com/questions/52045994/is-it-possible-to-run-java-jar-on-gem5-simulator-with-isa-x86

问题 I am trying to run an application which uses pagemap in gem5 FS mode. But I am not able to use pagemap in gem5. It throws below error - "assert(pagemap>=0) failed" The line of code is: int pagemap = open("/proc/self/pagemap", O_RDONLY); assert(pagemap >= 0); Also, If I try to run my application on gem5 terminal with sudo ,it throws error- sudo command not found How can I use sudo in gem5 ?? 回答1: These problems are not gem5 specific, but rather image / Linux specific, and would likely happen

问题 If I try to use more than --num-cpus=8 cores, e.g. 16, 32 or 64, the terminal just stays blank. Tested with gem5 at commit 2a9573f5942b5416fb0570cf5cb6cdecba733392 and Linux kernel 4.16. Related thread: https://www.mail-archive.com/gem5-users@gem5.org/msg15469.html 回答1: If I add more to Ciro's answer, the current GICv2 model in gem5 supports single core by default because of this line of code. Without enabling gem5ExtensionsEnabled , it won't update the highest_int with the receiving