Re: [gem5-users] Dynamic frequency change
Hi Simone, The method does not exist in Python. Remember that essential all objects in gem5 have both a Python object (used for setting parameters mostly), and a C++ object (actually involved in the simulation). In general you should either use full-system and leave the DVFS to the OS (I would say this is the most sensible), or use a subclass of the DVFSHandler where you implement the decision making in hardware. Good luck. Andreas From: Simone Corbetta simone.corbe...@gmail.commailto:simone.corbe...@gmail.com Reply-To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Date: Thursday, 18 June 2015 00:04 To: gem5-users@gem5.orgmailto:gem5-users@gem5.org gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: [gem5-users] Dynamic frequency change Dear all, I'm trying to dynamically change the clock frequency, and I noticed that the SrcClockDomain object has a clockPeriod(Tick) method that automatically forwards its changes to the children objects (as per the method documentation). Thus, I included in the Simulate.py script, within the repeatSwitch() method the following line (at appropriate point): testsys.cpu_clk_domain.clockPeriod(4000) However, while executing Python complains that Traceback (most recent call last): File string, line 1, in module File /home/imec/gem5/gem5/src/python/m5/main.py, line 388, in main exec filecode in scope File ../configs/example/se.py, line 278, in module Simulation.run(options, root, system, FutureClass) File /home/imec/gem5/gem5/configs/common/Simulation.py, line 728, in run maxtick, options.repeat_switch) File /home/imec/gem5/gem5/configs/common/Simulation.py, line 451, in repeatSwitch testsys.cpu_clk_domain.clockPeriod(4000) File /home/imec/gem5/gem5/src/python/m5/SimObject.py, line 1103, in __getattr__ raise AttributeError, err_string AttributeError: object 'SrcClockDomain' has no attribute 'clockPeriod' while it is clear that clockPeriod is present in the SrClockDomain object. Am I missing somethng? How to fix this? Thanks Best regards Simone -- 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 gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] Physical address too long!!!!
Hi Kassan, Perhaps I have misunderstood your question… Why on earth would the address be in the range [0 : 64 kByte] ? Just because the cache is small does not mean it holds addresses in any specific range. Andreas From: kassan unda kassanu...@gmail.commailto:kassanu...@gmail.com Reply-To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Date: Wednesday, 17 June 2015 17:18 To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: [gem5-users] Physical address too long Hi all, I am trying to print the physical address of the data read write from data cache. I am printing the physical address using pkt-getAddr() in cache_impl.hh address inside the following function templateclass TagStore bool CacheTagStore::access(PacketPtr pkt, BlkType *blk, Cycles lat, PacketList writebacks I am printing address like 1244784 (after converting hex to decimal). The dcache is only 64kb. Can anyone point out whats wrong. Appreciate your help!! Regards, Kassan Unda Doctoral Candidate Computer Engineering Missouri ST (Formerly University of Missouri Rolla) WebPage: http://web.mst.edu/~kutx9 Do not go where the path may lead, go instead where there is no path and leave a trail. Ralph Waldo Emerson -- 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 gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] ARM KVM support
Hi Junaid, That was a long time ago… The aarch64 KVM cpu model should be working just fine (in full-system mode). Andreas From: Junaid Shuja junaidsh...@siswa.um.edu.mymailto:junaidsh...@siswa.um.edu.my Reply-To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Date: Thursday, 18 June 2015 00:33 To: gem5-users@gem5.orgmailto:gem5-users@gem5.org gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: [gem5-users] ARM KVM support Hi, In the gem5 tutorial, it is stated that KVM ARM support is under work. http://gem5.org/dist/tutorials/hipeac2012/gem5_hipeac.pdf Can you please specify the current status of this work? -- Junaid Shuja WHA130039 PhD Student, FSKTM University of Malaya -- 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 gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] Physical address too long!!!!
Yes I know. What I am trying to do is to print the exact location of the dcache being read from not the physical address of the data stored in the memory. I meant that since the DCache is only 64 kb the address of this physical location in the dcache cant be too long. So I am guessing this is not the right way to do it. Can you please point me to the correct direction. Thx in advance. *Regards,* *Kassan Unda* *Doctoral Candidate* *Computer Engineering* *Missouri ST (Formerly University of Missouri Rolla)* *WebPage: http://web.mst.edu/~kutx9 http://web.mst.edu/~kutx9* *Do not go where the path may lead, go instead where there is no path and leave a trail.* Ralph Waldo Emerson On Thu, Jun 18, 2015 at 5:15 AM, Andreas Hansson andreas.hans...@arm.com wrote: Hi Kassan, Perhaps I have misunderstood your question… Why on earth would the address be in the range [0 : 64 kByte] ? Just because the cache is small does not mean it holds addresses in any specific range. Andreas From: kassan unda kassanu...@gmail.com Reply-To: gem5 users mailing list gem5-users@gem5.org Date: Wednesday, 17 June 2015 17:18 To: gem5 users mailing list gem5-users@gem5.org Subject: [gem5-users] Physical address too long Hi all, I am trying to print the physical address of the data read write from data cache. I am printing the physical address using pkt-getAddr() in cache_impl.hh address inside the following function templateclass TagStore bool CacheTagStore::access(PacketPtr pkt, BlkType *blk, Cycles lat, PacketList writebacks I am printing address like 1244784 (after converting hex to decimal). The dcache is only 64kb. Can anyone point out whats wrong. Appreciate your help!! *Regards,* *Kassan Unda* *Doctoral Candidate * *Computer Engineering* *Missouri ST (Formerly University of Missouri Rolla)* *WebPage: http://web.mst.edu/~kutx9 http://web.mst.edu/~kutx9* *Do not go where the path may lead, go instead where there is no path and leave a trail.* Ralph Waldo Emerson -- 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 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
Re: [gem5-users] SOC design questions
Hi Andreas Thank you very much for your help. One more question, if I use the classic memory system, will I be able to write my own bus controller or protocol? Best, Vivian Hi Vivian, I would suggest your best option is to stick with the classic (non-Ruby) memory system, and use the CommMonitor for packet tracing. Andreas On 16/06/2015 20:51, chelin chelin...@gmail.com mailto:chelin...@gmail.com wrote: HI there I'm trying to simulate a post silicon SOC validation by creating my own platform and monitor the ports output. I just started learning Gem5 so if some of you can help me answer couple questions I would really appreciate it. 1. Can I create my own interconnection object, like my own bus with 2. If yes, can I create my own protocol for this bus. I know that Ruby seems to be very powerful, but there is not too much examples online, can you give me some tips on where to find those documentations. 3. For ruby, I want to connect it to CPUs and some other peripherals, does the protocol also cover the peripheral part? 4. According to the Ruby documentation, it only use ports for CPu and devices, inside the RUby, the MessageBuffer is used instead. Is there anyway for me to monitor the information sent in between with the port content. I try to figure out the structure inside ruby but failed. and when I use debug-flags=Ruby, the ports name they provide is just numbers, so I don't really know which content send the message. Thanks. Best, Vivian ___ gem5-users mailing list gem5-users@gem5.org mailto:gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users 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
[gem5-users] How to model a die-stacked DRAM?
Hello Users, Has anyone tried to model a die-stacked DRAM using gem5's classic memory system? I read a couple of papers, in which they model die-stacked DRAM using DRAMSim2. How difficult it would be to model and any pointers on where to start? Thanks, Prathap Kumar Valsan ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Dynamic frequency change
Dear all, I'm trying to dynamically change the clock frequency, and I noticed that the SrcClockDomain object has a clockPeriod(Tick) method that automatically forwards its changes to the children objects (as per the method documentation). Thus, I included in the Simulate.py script, within the repeatSwitch() method the following line (at appropriate point): testsys.cpu_clk_domain.clockPeriod(4000) However, while executing Python complains that Traceback (most recent call last): File string, line 1, in module File /home/imec/gem5/gem5/src/python/m5/main.py, line 388, in main exec filecode in scope File ../configs/example/se.py, line 278, in module Simulation.run(options, root, system, FutureClass) File /home/imec/gem5/gem5/configs/common/Simulation.py, line 728, in run maxtick, options.repeat_switch) File /home/imec/gem5/gem5/configs/common/Simulation.py, line 451, in repeatSwitch testsys.cpu_clk_domain.clockPeriod(4000) File /home/imec/gem5/gem5/src/python/m5/SimObject.py, line 1103, in __getattr__ raise AttributeError, err_string AttributeError: object 'SrcClockDomain' has no attribute 'clockPeriod' while it is clear that clockPeriod is present in the SrClockDomain object. Am I missing somethng? How to fix this? Thanks Best regards Simone ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] ARM KVM support
Hi, In the gem5 tutorial, it is stated that KVM ARM support is under work. http://gem5.org/dist/tutorials/hipeac2012/gem5_hipeac.pdf Can you please specify the current status of this work? -- Junaid Shuja WHA130039 PhD Student, FSKTM University of Malaya ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] Range of Address in a Large Memory System
Hi, I run gem5 in SE mode with following command for SPEC CPU 2006 workloads. ./build/ALPHA/gem5.opt ./configs/example/cmp.py -b libq,libq,libq,libq,libq,libq,libq,libq --mem-size=16GB --mem-type=simple_mem -n 8 --caches --l2cache --cpu-type=atomic --cpu-clock=4GHz --l2_size=4MB --cacheline_size=64 --l1i_size=64kB --l1d_size=64kB --l2_assoc=8 -I 10 I determined the maximum address received in the memory system for all my applications (mcf, libq, namd, perl, gcc, milc, omntp,...). I saw lbm accessed the largest address among all (3435354624) which is a 32-bit address. Why my applications did not use at least the half of the 16-GB memory system? I reduced the mem_size to 4GB and every thing is OK.. I checked the workload-to-CPU assignments. They assigned to the different CPUs with different objects. --Assigning--- Process( 0 )= orphan lbm system.cpu[ 0 ].workload = [Mybench.lbm object at 0x3f2fa50] Process( 1 )= orphan lbm system.cpu[ 1 ].workload = [Mybench.lbm object at 0x4077e10] Process( 2 )= orphan lbm system.cpu[ 2 ].workload = [Mybench.lbm object at 0x4077ed0] Process( 3 )= orphan lbm system.cpu[ 3 ].workload = [Mybench.lbm object at 0x4077f90] Process( 4 )= orphan lbm system.cpu[ 4 ].workload = [Mybench.lbm object at 0x4081090] Process( 5 )= orphan lbm system.cpu[ 5 ].workload = [Mybench.lbm object at 0x4081150] Process( 6 )= orphan lbm system.cpu[ 6 ].workload = [Mybench.lbm object at 0x4081210] Process( 7 )= orphan lbm system.cpu[ 7 ].workload = [Mybench.lbm object at 0x40812d0] workloads assigned to cpus I knew that some SPEC applications have a very large working sets. What is wrong with my system? ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
