----- Original Message ----- From: Gong Zhuo <[EMAIL PROTECTED]> To: Gong Zhuo <gongzhuo at 163.net> Sent: Tuesday, August 22, 2000 11:10 AM Subject: Fw: How to caculate the MIPS of my MVME2600?
> > ----- Original Message ----- > From: Gong Zhuo <gongzhuo at 163.net> > To: linuxppc dev <linuxppc-dev at lists.linuxppc.org> > Sent: Monday, August 21, 2000 4:20 PM > Subject: How to caculate the MIPS of my MVME2600? > > > > Hi: > > I am developing program under MVME2600. But I found the program is not > as > > fast as I think. So I tested my computer board using the mothed like this > > and get some impossible results: > > > > * fill the mem from 0x4000 to 0x8000 with instruction 'or r0,r0,r0' > > * DEC ==> r3, us counter value ==> r13 at 0x4000 > > * DEC ==> r4, us counter value ==> r14 at 0x8000 > > * breakpoint at 0x8008 > > * go from 0x4000 > > > > The display of PPCbug like this: > > > > Copyright Motorola Inc. 1988 - 1997, All Rights Reserved > > > > PPC1 Debugger/Diagnostics Release Version 3.5 - 01/30/98 RM01 > > COLD Start > > > > Local Memory Found =04000000 (&67108864) > > > > MPU Clock Speed =200Mhz > > > > BUS Clock Speed =67Mhz > > > > WARNING: Keyboard Not Connected > > > > Reset Vector Location : ROM Bank A > > Mezzanine Configuration: Single-MPU > > Current 60X-Bus Master : MPUIdle MPU(s) : NONE > > > > System Memory: 64MB, ECC Enabled (ECC-Memory Detected) > > L2Cache: 256KB > > > > PPC1-Bug> > > > > PPC1-Bug>bf 4000:4000 7c000378 ;w > > Effective address: 00004000 > > Effective count : &65536 > > PPC1-Bug>as 4000 > > 00004000 3D80FEF8 ADDIS R12,R0,$FEF8? > > 00004004 81AC0100 LWZ R13,$100(R12) ($00000100) > > 00004008 7C7602A6 MFSPR R3,22 > > 0000400C 7C000378 OR R0,R0,R0? . > > PPC1-Bug>as 8000 > > 00008000 7C9602A6 MFSPR R4,22 > > 00008004 81CC0100 LWZ R14,$100(R12) ($00000100) > > 00008008 7C000378 OR R0,R0,R0? . > > PPC1-Bug>br 8008 > > BREAKPOINTS > > 00008008 > > PPC1-Bug>g 4000 > > Effective address: 00004000 > > At Breakpoint > > IP =00008008 MSR =00003040 CR =00000000 FPSCR =00000000 > > R0 =00000000 R1 =03F78000 R2 =00000000 R3 =3F0A7D37 > > R4 =3F0A64CE R5 =00000000 R6 =00000000 R7 =00000000 > > R8 =00000000 R9 =00000000 R10 =00000000 R11 =00000000 > > R12 =FEF80000 R13 =0BF88E8D R14 =0BF89008 R15 =00000000 > > R16 =00000000 R17 =00000000 R18 =00000000 R19 =00000000 > > R20 =00000000 R21 =00000000 R22 =00000000 R23 =00000000 > > R24 =00000000 R25 =00000000 R26 =00000000 R27 =00000000 > > R28 =00000000 R29 =00000000 R30 =00000000 R31 =00000000 > > SPR0 =00000000 SPR1 =00000000 SPR8 =00000000 SPR9 =00000000 > > 00008008 7C000378 OR R0,R0,R0 > > PPC1-Bug> > > > > > > The result: > > r4 -r3 = 0x1869 , r14 - r13 = 0x17B (379us) . There are 0x1000 asm > > instruction from 0x4000 to 0x8000 (4096), than the MIPS = 4096/379 = > 10MIPS > > . It's impossilbe because the MPU is 200Mhz and bus is 67Mhz. The MIPS > > should be higher than 200MIPS. > > > > I have made some mistakes? What are they? > > > > > > > > > > > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
