legOS : 3549


Robotics / RCX / legOS / 3549	3548 \| 3550

Subject:	Re: My problems with adding a Best Fit algorithm for memory management to kernel/mm.c
Newsgroups:	lugnet.robotics.rcx.legos
Date:	Sun, 7 Dec 2003 05:51:30 GMT
Viewed:	4261 times

In lugnet.robotics.rcx.legos, Mark Riley wrote: > > Hi Mike, > > It would be helpful to see each of the memory block dumps and some notation as > to what actions you took between each dump (i.e. RCX on/off, program downloaded, > etc...) > > Mark Mark, Thanks for the reply, and sorry I forgot to include some more details I have results from 2 memory scans (the values may be a bit off from each other (i.e. starting addresses, but that is becuase they are from 2 times I ran it, and I added some OS code one time - it did not effect the output). You should be able to get the idea of the problem from the examples though. When I did not shut off the RCX between program executions here is the allocation of memory Addr PID Size -------------------- ADEA AD50 000A AE02 AD50 0040 AE86 AD50 0004 AE92 AD50 000A AEAA AD50 0040 AF2E AD50 0004 AF3A AD50 000A AF52 AD50 0040 AFD6 AD50 000A AFEE AD50 0100 B1F2 AD50 0004 B1FE AD50 000A B216 AD50 0100 B41A AD50 000A B432 AD50 0100 B636 0000 0007 B648 AFDA 006B B722 B202 000A B73A B202 0200 BB3E B202 0004 BB4A B726 0020 BB8E 0000 0038 BC02 B726 001A BC3A 0000 008F BD5C B726 0002 BD64 B726 000B BD7E 0000 18D5 EF2C FFFF 0010 EF50 0000 0054 EFFC FFFF 0700 FE00 0000 007C FEFC FFFF 0080 When I did shut off the RCX between program executions here is the allocation of memory Addr PID Size -------------------- ADCA 0000 042D B648 AFDA 006B B072 AD50 000A B71A AD50 0040 B79E AD50 0004 B7AA AD50 000A B7C2 AD50 0040 B846 AD50 0004 B852 AD50 000A B86A AD50 0040 B8EE AD50 000A B906 AD50 0100 BB0A AD50 0004 BB16 AD50 000A BB2E AD50 0100 BD32 AD50 000A BD4A AD50 0100 B74E B202 000A B766 B202 0200 C36A B202 0004 C376 B726 0020 C36A 0000 0038 C42E B726 001A C466 0000 008F C588 B726 0002 C590 B726 000B C5AA 0000 18D5 EF2C FFFF 0010 EF50 0000 0054 EFFC FFFF 0700 FE00 0000 007C FEFC FFFF 0080 Thanks for the help, Mike

Message has 1 Reply:

		Re: My problems with adding a Best Fit algorithm for memory management to kernel/mm.c
(...) <snip> (...) <snip> (...) <snip> I didn't have time to mention this in my earlier post, but this memory dump points out a potential problem with the way BrickOS allocates memory for programs. In the above memory dump, the 0x6B words at 0xB648 (...) (21 years ago, 11-Dec-03, to lugnet.robotics.rcx.legos)

Message is in Reply To:

		Re: My problems with adding a Best Fit algorithm for memory management to kernel/mm.c
(...) Hi Mike, It would be helpful to see each of the memory block dumps and some notation as to what actions you took between each dump (i.e. RCX on/off, program downloaded, etc...) Mark (21 years ago, 7-Dec-03, to lugnet.robotics.rcx.legos)

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