Hi Tony, Thanks again for your help. After I assign the cache parameter to self.cacheMemory, it ends up with an infinite loop: RuntimeError: system.caches.controllers0.cacheMemory: Cycle found in configuration hierarchy This is how I set the cache parameter: self.cacheMemory.replacement_policy.cache = self.cacheMemory Do you know why the cache parameter is needed because I can’t find where this parameter is used in the source code?
Thanks, Mingyuan On Aug 22, 2019, at 6:08 PM, MINGYUAN XIANG <gem5-users-boun...@gem5.org<mailto:gem5-users-boun...@gem5.org>> wrote: Hi Tony, Thanks for your help. When I set the cache parameter to cacheMemory, which uses WeightedLRUReplacementPolicy, it ends up with an infinite loop: RuntimeError: system.caches.controllers0.cacheMemory: Cycle found in configuration hierarchy And this is how I set the parameter: self.cacheMemory.replacement_policy.cache = self.cacheMemory Besides, I find that this parameter is not used in any C++ files, and there are no comments to explain this parameter. Would you mind be more specific about how to set this parameter correctly? Thanks, Mingyuan On Aug 22, 2019, at 2:25 PM, Gutierrez, Anthony <anthony.gutier...@amd.com<mailto:anthony.gutier...@amd.com>> wrote: The cache parameter is not in the ReplacementPolicy class. It is in the WeightedLRUReplacementPolicy class, which you are trying to use. See: src/mem/ruby/system/WeightedLRUReplacementPolicy.py Tony From: gem5-users <gem5-users-boun...@gem5.org<mailto:gem5-users-boun...@gem5.org>> On Behalf Of MINGYUAN XIANG Sent: Thursday, August 22, 2019 10:57 AM To: gem5 users mailing list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>> Subject: Re: [gem5-users] I don't know how to set WeightedLRUReplacementPolicy in Ruby system [CAUTION: External Email] Hi Tony, Sorry that I don’t quite understand what you are saying. When I try to use other replacement policies, like LRU for example, I just add the following line to the script: replacement_policy = LRUReplacementPolicy() And it works. Besides, I cannot find object cache in ReplacementPolicy class, nor in RubyCache class. Thanks, Mingyuan On Aug 21, 2019, at 12:08 PM, Gutierrez, Anthony <anthony.gutier...@amd.com<mailto:anthony.gutier...@amd.com>> wrote: Hi Mingyuan, The error indicates that the replacement policy object’s child, “cache”, is not set. You’ll need to set replacement_policy.cache in your configuration script. Tony From: gem5-users <gem5-users-boun...@gem5.org<mailto:gem5-users-boun...@gem5.org>> On Behalf Of MINGYUAN XIANG Sent: Wednesday, August 21, 2019 9:38 AM To: gem5-users@gem5.org<mailto:gem5-users@gem5.org> Subject: [gem5-users] I don't know how to set WeightedLRUReplacementPolicy in Ruby system [CAUTION: External Email] Hello All I’m new to gem5, and I downloaded a fresh copy of gem5. I try to use a different replacement policy in the Ruby system instead of the default one. I notice that there is a replacement policy in src/mem/ruby/system/ called WeightedLRUReplacementPolicy. So, I modify the simple ruby script that I download from gem5 tutorial in part3. I add the following line when I instantiate cacheMemory: replacement_policy = WeightedLRUReplacementPolicy() However, it simply couldn’t work. When I run the configuration script, this error came up: fatal: system.caches.controllers0.cacheMemory.replacement_policy.cache without default or user set value In the config.ini file, it says I’m using WeightedLRUReplacementPolicy. Do you know why this happened? By the way, I’m using MSI protocol. The build command is: scons build/X86_MSI/gem5.opt --default=X86 PROTOCOL=MSI HTML_SLICC=True Best Mingyuan _______________________________________________ gem5-users mailing list gem5-users@gem5.org<mailto:gem5-users@gem5.org> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users _______________________________________________ gem5-users mailing list gem5-users@gem5.org<mailto:gem5-users@gem5.org> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users _______________________________________________ gem5-users mailing list gem5-users@gem5.org<mailto:gem5-users@gem5.org> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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