Re: [gem5-users] Debugging std::bad_alloc memory errors in gem5
Thank you, Ciro. Turned out that by disabling most of the (classic) cache stat handlers, I was able to free up a lot of memory. Subhankar Pal | PhD Candidate, CSE | University of Michigan On March 25, 2020 at 4:38:52 AM, Ciro Santilli (ciro.santi...@gmail.com) wrote: I would try to put prints/PDB on src/python/m5/stats/__init__.py where enable is called. On Wed, Mar 25, 2020 at 5:35 AM Subhankar Pal wrote: > > Hi, > > I am trying to run simulations in SE mode with a 1000+ (simple) cores. I get the following error once m5.instantiate() is called. > Traceback (most recent call last): > File "", line 1, in > File "/home/subh/gem5/src/python/m5/main.py", line 436, in main > exec filecode in scope > File “configs/se_mod.py", line 1586, in > m5.instantiate() > File "/home/subh/gem5/src/python/m5/simulate.py", line 139, in instantiate > stats.enable() > File "/home/subh/gem5/src/python/m5/stats/__init__.py", line 180, in enable > stat.enable() > MemoryError: std::bad_alloc > > My system is a heavily modified se.py and I have multiple custom memObjects, some of which allocate memory, i.e. using functions similar to createBackingStore() in src/mem/physical.cc. > > Is there an easy way to track down which memObject class allocates the most memory, or at least which memObject the allocation fails for? I have tried invoking gem5.opt with gdb, but I don’t get a backtrace, presumably because the failure happens in a Python function call. > > Thank for any help. > > Subhankar Pal | PhD Candidate, CSE | University of Michigan > ___ > 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
[gem5-users] Getting response packets from the slave component via CommMonitor()
Hi all, >From my understanding,* master simObjects (CPUs, GPUs) generate requests *to the slave simObjects(L1private split cache, membus, L2 cache etc.), slaves responses to the requests. I want to see both *requests* and *response* packets. I have attached a communication monitor in addPrivateSplitL1Caches function of BaseCPU.py which I believe captures packets only in one direction: CPU to L1_data_cache . ... #Communication Monitor between l1d cache and the CPU #self.dcache_port = dc.cpu_side self.monitor = CommMonitor() self.monitor.trace = MemTraceProbe(trace_file='CPU'+str(self)+'.trc') self.dcache_port = self.monitor.slave self.monitor.master = dc.cpu_side My first question is how to get the response packets? Like the response packets from the L1_data_cache to CPU. My second query is, tell me if I am wrong: I need following information from a packet: 1 . sender of the packet 2. receiver of the packet 3. command of the packet 4. physical memory address(if any) In the decoded packets I find packet id (which I assume refers to master/sender (1)), the place where I place the commMonitor() tells me who is the receiver of the packet(2), and decoding the packet gets me (3) and (4). Please correct me if I am doing/assuming anything wrong here. Please see the config.dot.svg to see the system I am simulating. My 3rd query is: the communication monitor I attached has been attached between cache(L1) and the CPU? Thanks for reading my long email. Any help will be highly appreciated. Regards, *Rubel Ahmed* ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] How to Changed Commmonitor output?
if Commmonitor exist between L1D cache and CPU, output is Packet information encoding protobuf. Output file Packet Information is this link https://www.gem5.org/documentation/general_docs/cpu_models/TraceCPU . By changing commmonitor, I would also like to see information about the data contained in the packet as an output file. modifying comm_monitor.cc or commmonitor.py ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] Debugging std::bad_alloc memory errors in gem5
I would try to put prints/PDB on src/python/m5/stats/__init__.py where enable is called. On Wed, Mar 25, 2020 at 5:35 AM Subhankar Pal wrote: > > Hi, > > I am trying to run simulations in SE mode with a 1000+ (simple) cores. I get > the following error once m5.instantiate() is called. > Traceback (most recent call last): > File "", line 1, in > File "/home/subh/gem5/src/python/m5/main.py", line 436, in main > exec filecode in scope > File “configs/se_mod.py", line 1586, in > m5.instantiate() > File "/home/subh/gem5/src/python/m5/simulate.py", line 139, in instantiate > stats.enable() > File "/home/subh/gem5/src/python/m5/stats/__init__.py", line 180, in enable > stat.enable() > MemoryError: std::bad_alloc > > My system is a heavily modified se.py and I have multiple custom memObjects, > some of which allocate memory, i.e. using functions similar to > createBackingStore() in src/mem/physical.cc. > > Is there an easy way to track down which memObject class allocates the most > memory, or at least which memObject the allocation fails for? I have tried > invoking gem5.opt with gdb, but I don’t get a backtrace, presumably because > the failure happens in a Python function call. > > Thank for any help. > > Subhankar Pal | PhD Candidate, CSE | University of Michigan > ___ > 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] Run APK on Gem5
You have to either fully boot Android on fs.py or find some userland setup which I don't know about for SE. I don't have a fully automated Android boot setup, so just try it out and tell if it fails and how. For plain Java, it is much more likely that you will be able to run in SE: but will need to implement some missing syscalls, might be easy: https://stackoverflow.com/questions/58399259/running-java-programs-in-gem5or-any-language-which-is-not-c and for sure booting Ubuntu and running it there in FS will work. On Wed, Mar 25, 2020 at 2:26 AM ABD ALRHMAN ABO ALKHEEL wrote: > > Hi All, > > I wanna run the apk binary files on ARM gem5 in se mode. Any help would be > appreciated. > > Best Regards > ___ > 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
