Hi,
I have a question regarding L2 Latency. I’ve run the BBench benchmark with 2MB L2 size and @600MHZ. when I used 30 ns and 34 ns L2 Latency it works fine. But when I used 32ns or 35ns or 25ns I’ve the following error (I used Cache debug flag). *anic: Uncachable load [sn:4304d08] PC (0xc016e0c0=>0xc016e0c4).(0=>1)* * @ cycle 983526217577* *[invoke:build/ARM/arch/generic/debugfaults.hh, line 94]* *Memory Usage: 532200 KBytes* *Program aborted at cycle 983526217577* */tmp/1343295426.694498: line 8: 16024 Aborted (core dumped) $USER_STARTER* * * *024952552855: system.cpu0.dcache: replacement: replacing fbe1640 with fa4d640: writeback* *1024952552855: system.cpu0.dcache: Block addr fa4d640 moving from state 0 to 15* *1024952562856: system.l2: Writeback fbe1640 miss* *1024952562856: system.l2: replacement: replacing f4a1640 with fbe1640: writeback* *1024952579501: system.cpu1.dcache: Handling response to 18000000* *1024952602864: system.cpu0.icache: ReadReq (ifetch) 37900 hit* *1024952614533: system.cpu0.icache: ReadReq (ifetch) 4a0c0 hit* *1024952626202: system.cpu0.dcache: ReadReq f82c014 hit* *1024952639538: system.cpu0.dcache: ReadReq fa4d674 hit* *1024952712886: system.cpu0.icache: ReadReq (ifetch) 37900 hit* *1024952717887: system.cpu0.icache: ReadReq (ifetch) 4a0c0 hit* *1024952726222: system.cpu0.icache: ReadReq (ifetch) b1940 hit* *1024952736000: system.l2: Handling response to 18000000* *1024952759562: system.cpu0.icache: ReadReq (ifetch) 37900 hit* *1024952764563: system.cpu0.icache: ReadReq (ifetch) 4a0c0 hit* *1024952772815: system.cpu1.dcache: Handling response to 18000000* *1024952772898: system.cpu0.icache: ReadReq (ifetch) b1940 hit* *1024952777899: system.cpu0.icache: ReadReq (ifetch) 4a180 miss* *1024952781233: system.cpu0.icache: ReadReq (ifetch) 4a0c0 hit* *1024952782899: system.cpu0.dcache: snooped a ReadReq request for addr 4a180, new state is 5* *1024952782899: system.l2: ReadReq (ifetch) 4a180 hit* *1024952787901: system.cpu0.icache: ReadReq (ifetch) 4a180 miss* *1024952792902: system.l2: ReadReq fa73420 hit* *1024952794569: system.cpu0.icache: ReadReq (ifetch) 65500 hit* *panic: Uncachable load [sn:3feb786] PC (0xc016e0cc=>0xc016e0d0).(0=>1)* * @ cycle 1024952796236* *[invoke:build/ARM/arch/generic/debugfaults.hh, line 94]* *Memory Usage: 549880 KBytes* *Program aborted at cycle 1024952796236* */tmp/1343986785.1150779: line 8: 5478 Aborted (core dumped) $USER_STARTER build/ARM/gem5.opt --debug-flags=Cache configs/example/fs.py --kernel=vmlinux.smp.mouse.arm --disk-image=ARMv7a-Gingerbread-Android.SMP.mouse.nolock.img -b bbench --caches --l2cache --cpu-type=arm_detailed -n 4* Thanks in advance Regards, Ali Chaker
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