Hi, I am adding a new prefetcher in m5’s last level cache system. But I have encountered some bugs when using the simulator:
The simulation with new prefecther sometimes works out with absolutely wrong statistics (for example, in SPEC2006cpu.omnetpp, the L3 access counts are far smaller than simulation without the prefetcher). I find that in the wrong simulation, a ReadReq packet receive a hit in MSHR (this mshr is a prefetching request). I examine the cache_impl.hh code, and find there is a “todo” remark in timingAcess() function: //@todo remove hw_pf here This remarks is in the section where access receive a miss in tags and a hit mshr, and the hit in mshr is a prefetch request (exact thing happened in my wrong simulation). I wonder whether such a situation causes the bug I have encountered. Does anybody can help figure out where is the problem? 发件人: [email protected] [mailto:[email protected]] 代表 Steve Reinhardt 发送时间: 2010年12月22日星期三 7:48 收件人: M5 users mailing list 主题: Re: [m5-users] Can't resolve Frequency error for FS Script File I think it's actually complaining about this line from src/sim/System.py: boot_cpu_frequency = Param.Frequency(Self.cpu[0].clock.frequency, "boot processor frequency") It's hard to say what the problem is without knowing more about the specific changes you've made to your config file. Steve On Mon, Dec 20, 2010 at 10:32 AM, Malek Musleh <[email protected]> wrote: Hello, I am working on creating a script file to run my configured system (not using the standard Bus topology provided by the dev repo) and am receiving the following error when I try to run: File "/home/musleh/m5_modified_step/configs/common/Simulation.py", line 195, in run m5.instantiate(root) File "/home/musleh/m5_modified_step/src/python/m5/simulate.py", line 52, in instantiate root.unproxy_all() File "/home/musleh/m5_modified_step/src/python/m5/SimObject.py", line 680, in unproxy_all self._children[child].unproxy_all() File "/home/musleh/m5_modified_step/src/python/m5/SimObject.py", line 660, in unproxy_all value = value.unproxy(self) File "/home/musleh/m5_modified_step/src/python/m5/proxy.py", line 94, in unproxy (self.path(), self._pdesc.ptype_str, base.path()) AttributeError: Can't resolve proxy 'cpu[0].clock.frequency' of type 'Frequency' from 'system' In searching the mailing list, it seems to me that this type of "Can't resolve proxy error" is because I am missing defining the frequency for the CPU Model in the script file. However, as in the fs.py file, I have included the following: DriveCPUClass = AtomicSimpleCPU drive_mem_mode = 'atomic' (TestCPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options) TestCPUClass.clock = '2GHz' DriveCPUClass.clock = '2GHz' My system config script file is not yet complete, but I don't see where else a frequency is defined in fs.py. One difference between mine and fs.py is that I am not using the "MakeLinuXAlphaSystem" call in FSConfig.py, but I don't see where in that def would resolve that error. Any suggestions, or do I need to provide additional information? Malek _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
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