[gem5-users] Extract data accessed by DRAM
Hi all, I want to extract data from DRAM. I tried to do that by using PacketDataPtr and PacketPtr but I didn't get any desired result. I implemented my code in accessAndRespond function after it calls access() of AbstractMemory class. But when I try to directly access the data at the address using a pointer, it gives me segmentation fault. If anyone has any suggestions then it would be really helpful. Thanks in advance. Regards, Wridhi ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Segmentation Fault in PARSEC Benchmark
Hi, I am running PARSEC benchmark on X86 system. It is running fine without checkpoints. But if I am using checkpoints, then after restoring checkpoint I am getting segmentation fault in PARSEC benchmark. I have used configs/boot/hack_back_ckpt.rcS to create checkpoint (cputype=timing). After I restored checkpoint (restore-cpu-type=O3), it ran PARSEC benchmark using the following script: #!/bin/sh # File to run the blackscholes benchmark echo "Running blackscholes" cd /parsec/install/bin /sbin/m5 dumpstats /sbin/m5 resetstats ./blackscholes 64 /parsec/install/inputs/blackscholes/in_4K.txt /parsec/install/inputs/blackscholes/prices.txt echo "Done :D" /sbin/m5 exit /sbin/m5 exit This gives following output: m5 slave terminal: Terminal 0 Loading new script... usage: /sbin/m5 exit [delay] /sbin/m5 resetstats [delay [period]] /sbin/m5 dumpstats [delay [period]] /sbin/m5 dumpresetstats [delay [period]] /sbin/m5 readfile [filename] /sbin/m5 execfile /sbin/m5 checkpoint [delay [period]] /sbin/m5 loadsymbol /sbin/m5 initparam /sbin/m5 sw99param /sbin/m5 pin [args ...] All times in nanoseconds! PARSEC Benchmark Suite Version 2.1 [HOOKS] PARSEC Hooks Version 1.2 Num of Options: 4096 Num of Runs: 100 Size of data: 163840 [HOOKS] Entering ROI blackscholes[796]: segfault at fc973680 rip 004048bc rsp 2ae564f3bbf8 error 4 Segmentation fault Done :D Cmdline to restore: ./build/X86/gem5.opt configs/example/fs.py --mem-type=DDR4_2400_8x8 --kernel=./x86parsec/binaries/x86_64-vmlinux-2.6.22.9.smp --disk-image=../x86root-parsec.img --checkpoint-restore=1 --restore-with-cpu=DerivO3CPU --script=./scripts/blackscholes_64c_simsmall.rcS The disk image from http://www.cs.utexas.edu/~parsec_m5/x86root-parsec.img.bz2. I tried to search this error on the gem5 mail archive, but I couldn't find any solution from there. It would be great if anyone can help me sort out this problem. Thanks in advance. Regards, Riddhi ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] To get data trace from add and sub instructions
Hi all, I am trying to get data trace from addition and subtraction instructions on x86. For this I located the place where add and sub instructions are evaluated i.e. src/arch/x86/isa/microops/mediaop.isa. In this file at line 915, a class Maddi is defined which adds integer values. Then in src/arch/x86/isa/insts/simd64/integer/arithmetic/addition.py file, maddi is called. So I am confused whether the maadi in latter file calls Maddi class in prior file or not ? I want to know this because when I run benchmark I am getting data trace for subtraction and not for addition. Whereas, addition should take place. Then why am I not getting data trace for addition? And this is also the same scenario for integer multiplication. Am I going on the right track? Any suggestions will be helpful to me. Thanks in advance. Regards, Riddhi ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Functional Models for ALU
Hi all, I am looking for the functional units of the ALU for X86 system. I noticed that there is a class IntAlu, IntMult, IntDiv, and so on (in file src/cpu/o3/FuncUnitConfig.py). But I could not figure out where the add instruction for ALU, and other sub, mul instructions are defined. Can anyone please help me how should I proceed further. Thanks in advance. Regards, Riddhi ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Couldn't read data from debugger
Hi all, I am running parsec and splash benchmarks on gem5. Until yesterday, it was all going fine, but today when I kept 5 benchmarks to run simultaneously on different copies of gem5, i am getting following error for all the runs: ... 5158682205750: system.remote_gdb: remote gdb attached warn: Couldn't read data from debugger. 5158944267500: system.remote_gdb: remote gdb detached ... The another terminal is showing nothing. I checked the system.pc.com_1.terminal file after terminating the process, it looks fine to me. I am unable to track the problem. It would be great if anyone can help me out with this :) Thanks in advance. Regards, Riddhi ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] Couldn't read data from debugger
Hi, I am running gem5 on X86 CentOS 6.9 system. I am using latest gem5 version. Command line: ./build/X86/gem5.opt configs/example/fs.py --mem-type=DDR3_1600_8x8 --cpu-type=DerivO3CPU --caches --l2cache --cacheline_size=64 --l1d_size=64kB --l1d_assoc=4 --l1i_size=32kB --l1i_assoc=4 --l2_size=2MB --l2_assoc=8 --kernel=/home/riddhi/gem5_cg_is_copy/x86parsec/binaries/x86_64-vmlinux-2.6.22.9.smp --disk-image=/home/riddhi/gem5_cg_is_copy/x86parsec/disks/x86root-parsec.img --script=/home/riddhi/gem5_cg_is_copy/scripts/streamcluster_64c_simlarge.rcS -F 2 Likewise, other 4 benchmarks are running: ferret, fluidanimate, bodytrack, x264 After running all the benchmarks simultaneously on ports 7000, 7001, 7002, 7003, 7004, when I open another terminal and go to that gem5 directory suppose (on gem5_1 directory, ferret benchmark is running) and type ./util/term/m5term localhost 7000 Nothing is printed on this terminal, same is the case with other ports also. For running 5 benchmarks at the same time, I have made different copies of gem5 (eg: gem5_1, gem5_2, etc.) and then in each copy I am running 1 benchmark. Why would this happen when I am running different programs on different copies of gem5? Regards, Riddhi On Mon, Jun 25, 2018 at 1:38 PM, Riddhi Thakker wrote: > Hi all, > > I am running parsec and splash benchmarks on gem5. Until yesterday, it was > all going fine, but today when I kept 5 benchmarks to run simultaneously on > different copies of gem5, i am getting following error for all the runs: > > ... > 5158682205750: system.remote_gdb: remote gdb attached > warn: Couldn't read data from debugger. > 5158944267500: system.remote_gdb: remote gdb detached > ... > > The another terminal is showing nothing. I checked the > system.pc.com_1.terminal file after terminating the process, it looks fine > to me. I am unable to track the problem. > > It would be great if anyone can help me out with this :) > > Thanks in advance. > > Regards, > Riddhi > ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Doubts in packet and request
Hello all, I have observed that when I run benchmarks, the size of the packet is always 64 bytes. Where as if I run small SE programs the sizes turns out to be different. If I call an instruction of 'int' size, it will not call the packet of size 64 bytes, it should be lesser. Following are my questions: 1) Why every time the packet size is 64 when I run a benchmark ? 2) The packet which is created refer to only one instruction (i.e. one request) or multiple ? 3) If packet refers to only one instruction or request then how come for all the kind of instructions is the packet size same ? 4) If a packet refers to different instructions or requests then how do I infer how much data bytes do each instruction wants? 5) When I am trying to explicitly use the getReqInstSeqNum() function, then why it gives me assertion failed error for VALID_INST_SEQ_NUM ? I really want to get answers for these questions. It will be a great help to me if anyone can get through this. Thanks in advance. Regards, Riddhi Thakker ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
