Dear all, First, I wish you success and fortune in 2015.
Reading C. Dirik question, I would ask if it is possible to simulate NoC using ARM ISA and a FullSystem simulation. Maybe using Garnet, and up to how many cores? Thank you in advance! Matheus Alcântara Souza > Em 02/01/2015, às 20:26, Cagdas Dirik (cdirik) via gem5-users > <[email protected]> escreveu: > > Thank you for the recommendation Andreas :) > > We (my team) will be looking at ARM full system pretty soon. For the time > being though, I am working to get our X86 systems up and running. > > As a reference to others working on X86, I have resolved my issue. It was due > to my inexperience with linux kernel development. I was using > $ make vmlinux > command and was trying to boot the simulator with > linux-x.y.z/arch/x86/boot/compressed/vmlinux file. Apparently this files does > not contain boot information - hence simulator would stuck at the very > beginning. > If instead I just use > $ make > and boot the simulator using linux-x.y.z/vmlinux file, everything continues > as expected. > > Cagdas > > On Dec 20, 2014, at 8:59 AM, Andreas Hansson > <[email protected]<mailto:[email protected]>> wrote: > > Hi Cagdas, > > Merely a reflection on my side...I get the impression there is not many gem5 > users out there doing X86 full system (based on the mailing list activity). > With the risk of sounding a bit biased, the ARM full system support is far > more tested and, I would argue, stable. ARM full system works with the latest > and greatest in terms of Linux kernels, and also supports features like DVFS > (http://www.gem5.org/Running_gem5#Experimenting_with_DVFS). I realise it > might not fit with your use-case, but just in case. > > Andreas > > From: "Cagdas Dirik via gem5-users (cdirik)" > <[email protected]<mailto:[email protected]>> > Reply-To: "Cagdas Dirik (cdirik)" > <[email protected]<mailto:[email protected]>>, gem5 users mailing list > <[email protected]<mailto:[email protected]>> > Date: Saturday, 20 December 2014 00:54 > To: gem5 users mailing list <[email protected]<mailto:[email protected]>> > Subject: [gem5-users] building kernel for X86 - gem5 hangs at the very > beginning with new kernel > > Hi, > > I am trying to build my own kernel, boot my own disk image, and run X86 in FS > mode . However I am running into issues with fresh built kernel because gem5 > hangs at the very beginning, nothing happens. > I can boot my debian image on qemu. I can also boot this image using > out-of-box 2.6.22.9 kernel (although udev fails since it requires version > 2.6.26) > But I cannot boot this image using fresh built kernel. I tried both dev > branch and stable branch. I also tried 2.6.26, 2.6.31 versions. All hang in > the same way. I don’t suspect anything different on kernel config (especially > with CPU type). > > I will follow guidelines in debugging page, and do some trace based > debugging. But in the meantime, if someone can give me a hint I will greatly > appreciate it. Are there any tool dependencies on building kernels for gem5? > Are there any other small details others experienced that I am missing? Do > others run into issues building their own kernel for gem5? > > One interesting thing is that when I compare my kernel vs. out-of-box kernel, > entry point addresses looks suspiciously different (0x200 vs. 0x200000 on > out-of-box kernel). That may result in jumping to an unexpected address and > result in system hang. Does anyone have any ideas why these addresses differ > significantly? Or would that be an issue? > > Below are details and my command lines for reference. > > Thanks in advance! > > Cagdas > > I downloaded kernel 2.6.28.4 (since x86 full system downloads come with > 2.6.28.4 config). My steps building the kernel (nothing out of ordinary): > > $ wget https://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.28.4.tar.bz2 > $ tar xjvf linux-2.6.28.4.tar.bz2 > $ cp $M5_PATH/configs/linux-2.6.28.4 linux-2.6.28.4/.config > $ cd linux-2.6.28.4 > $ make oldconfig > $ make -j 32 > $ make vmlinux -j 32 > > My gcc is 4.1.2 > > $ gcc --version > gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-54) > Copyright (C) 2006 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > > If I boot this image using out-of-box kernel, gem5 boots fine (although udev > fails with version being older than 2.6.26): > > $ build/X86/gem5.opt configs/example/fs.py --disk-image=debian-amd64.img > --kernel=x86_64-vmlinux-2.6.22.9.smp --cpu-type=atomic --mem-type=simple_mem > > If I instead use custom built 2.6.28.4 kernel, gem5 hangs at the very > beginning. Nothing happens in the system. > > $ build/X86/gem5.opt configs/example/fs.py --disk-image=debian-amd64.img > --kernel=vmlinux-2.6.28.4 --cpu-type=atomic --mem-type=simple_mem > gem5 Simulator System. http://gem5.org<http://gem5.org/> > gem5 is copyrighted software; use the --copyright option for details. > > gem5 compiled Dec 19 2014 13:56:08 > gem5 started Dec 19 2014 14:50:06 > gem5 executing on rndarch17 > command line: build/X86/gem5.opt configs/example/fs.py > --disk-image=debian-amd64.img --kernel=vmlinux-2.6.28.4 --cpu-type=atomic > --mem-type=simple_mem > Global frequency set at 1000000000000 ticks per second > info: kernel located at: > /proj/adg/REV/sim/cdirik/gem5-sims/ya-dist/m5/system/binaries/vmlinux-2.6.28.4 > Listening for com_1 connection on port 3456 > 0: rtc: Real-time clock set to Sun Jan 1 00:00:00 2012 > 0: system.remote_gdb.listener: listening for remote gdb #0 on port 7000 > warn: Reading current count from inactive timer. > **** REAL SIMULATION **** > info: Entering event queue @ 0. Starting simulation... > 5951693500: system.pc.com<http://system.pc.com/>_1.terminal: attach terminal 0 > > $ telnet 127.0.0.1 3456 > Trying 127.0.0.1... > Connected to localhost.localdomain (127.0.0.1). > Escape character is '^]'. > ==== m5 slave terminal: Terminal 0 ==== > > Here are the readelf outputs for two kernels for comparison: > > $ readelf -h $M5_PATH/binaries/x86_64-vmlinux-2.6.22.9.smp > ELF Header: > Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 > Class: ELF64 > Data: 2's complement, little endian > Version: 1 (current) > OS/ABI: UNIX - System V > ABI Version: 0 > Type: EXEC (Executable file) > Machine: Advanced Micro Devices X86-64 > Version: 0x1 > Entry point address: 0x200000 > Start of program headers: 64 (bytes into file) > Start of section headers: 54040168 (bytes into file) > Flags: 0x0 > Size of this header: 64 (bytes) > Size of program headers: 56 (bytes) > Number of program headers: 5 > Size of section headers: 64 (bytes) > Number of section headers: 49 > Section header string table index: 46 > > $ readelf -h $M5_PATH/binaries/vmlinux-2.6.28.4 > ELF Header: > Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 > Class: ELF64 > Data: 2's complement, little endian > Version: 1 (current) > OS/ABI: UNIX - System V > ABI Version: 0 > Type: EXEC (Executable file) > Machine: Advanced Micro Devices X86-64 > Version: 0x1 > Entry point address: 0x200 > Start of program headers: 64 (bytes into file) > Start of section headers: 5037024 (bytes into file) > Flags: 0x0 > Size of this header: 64 (bytes) > Size of program headers: 56 (bytes) > Number of program headers: 2 > Size of section headers: 64 (bytes) > Number of section headers: 12 > Section header string table index: 9 > > > -- IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. > > ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, > Registered in England & Wales, Company No: 2557590 > ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, > Registered in England & Wales, Company No: 2548782 > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
