It's X86 FS and classic model. Jinchun Kim
On Jan 7, 2013, at 4:17 PM, Nilay Vaish <ni...@cs.wisc.edu> wrote: > On Mon, 7 Jan 2013, Jinchun Kim wrote: > >> I was printing out TLB entries whenever virtual address hit or miss on TLB. >> And I found that TLB miss occurs even though TLB already has matched entry >> in it. >> >> For example, >> 4949665272500: system.cpu.dtb: L1 TLB Miss : VA = 0x7fab3f32c280 >> 4949665272500: system.cpu.dtb: tlb[41] : VPN = 0x7fab3f32c000, PPN = >> 0x1facd000 >> >> Translation for VA = 0x7fab3f32c280 is already in tlb[41]. >> However, it is considered as miss. >> After this weird TLB miss, gem5 puts same translation in TLB again. >> >> 4949667892500: system.cpu.dtb: tlb[41] : VPN = 0x7fab3f32c000, PPN = >> 0x1facd000 >> 4949667892500: system.cpu.dtb: tlb[42] : VPN = 0x7fab3f32c000, PPN = >> 0x1facd000 >> ...........(abbreviated) >> 4949667892500: system.cpu.dtb: tlb[46] : VPN = 0x6b4000, PPN = 0x1ff27000 >> 4949667892500: system.cpu.dtb: tlb[47] : VPN = 0x6b4000, PPN = 0x1ff27000 >> 4949667892500: system.cpu.dtb: tlb[48] : VPN = 0x6bd000, PPN = 0x1ff0a000 >> 4949667892500: system.cpu.dtb: tlb[49] : VPN = 0x6bd000, PPN = 0x1ff0a000 >> >> As you can see, there are several same translations in TLB. >> I played with this simulation with latest gem5-stable and dev version. >> Does anyone have idea why this is happening? >> I just don't understand why gem5 can't find proper translation when it is >> already in TLB and put same translation again. > > Which architecture? > > -- > Nilay _______________________________________________ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
