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Hypex
How do you understand a CFE memory test?
Posted on: 2023/4/8 7:57    #1
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Hi guys.

I've been trying to understand the CFE memory tests for years. I have found no info on what they mean. And I so far cannot decipher the output of it. CFE commands testdram and memorytest appear to work fine. But randmemtest spews out a bunch of 64 bit numbers I don't get and hangs the machine. Is it normal for it to do this? CFE does have bugs so thought this might be another bug. The output implies some error and the hang isn't a good sign.

So here is output with one 2GB RAM stick inserted. I can't make any sense of it. Do other people get senseless results and a hang as well?

CFE> memorytest
Available memory arenas:
phys = 0000000000000000, virt = 0000000000000000, size = 000000007FD1D000

Testing memory.

Testing: phys = 0000000000001500, virt = 0000000000001500, size = 000000007FD1BB00
Writing: a/5/c/3
Reading: a/5/c/3
Writing: address|5555/inv/aaaa|address
Reading: address|5555/inv/aaaa|address
MC_Status:  MC0: 00000000 [ ] SBE=0 | MC1: 00000000 [ ] SBE=0
*** command status = 0
CFE> testdram
DRAM test complete!
*** command status = 0
CFE> randmemtest
Writing (0000000000000000 -> 0000000010000000) scrambler=7
Reading.
mem[000000000FFFFFC0] 8000000000000000 should be 55555AAAAAAAAAAA (D5555AAAAAAAAAAA)
mem[000000000FFFFFC8] 7FE000087FE00008 should be AAAAA55555555555 (D54AA55D2AB5555D)
mem[000000000FFFFFD8] 7FE000087FE00008 should be AAAAAAAAAAAAAAAA (D54AAAA2D54AAAA2)
mem[000000000FFFFFD0] 7FE000087FE00008 should be 5555555555555555 (2AB5555D2AB5555D)
mem[000000000FFFFFE0] 7FE000087FE00008 should be 000000000FFFFFC0 (7FE00008701FFFC8)
mem[000000000FFFFFE8] 7FE000087FE00008 should be FFFFFFFFF000003F (801FFFF78FE00037)
mem[000000000FFFFFF0] 7FE000087FE00008 should be 0000000000000000 (7FE000087FE00008)
mem[000000000FFFFFF8] 7FE000087FE00008 should be FFFFFFFFFFFFFFFF (801FFFF7801FFFF7)

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Raziel
Re: How do you understand a CFE memory test?
Posted on: 2023/4/8 9:35    #2
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@Hypex

Quote:

Do other people get senseless results and a hang as well?


Yes, don't bother with it.
It was probably meant for some other environment...never worked here, always showed errors too when there were none.
--

game box/art scans
scummvm infrequent builds
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noXLar
Re: How do you understand a CFE memory test?
Posted on: 2023/4/8 22:39    #3
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will this help?

https://github.com/kevbroch/cfe
Sam460ex 2GB 120Gb SSD&1Tb HD7750 Envy24HT A-Eon Drv 2.10+Warp3D New Uboot
Apollo v4 Standalone
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Hypex
Re: How do you understand a CFE memory test?
Posted on: 2023/4/9 13:49    #4
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@Raziel

Thanks. Yeah, CFE wasn't meant to run on PPC, yet alone run on a desktop mobo so no surprises it had some quirks. Plus it was hacked by whomever to run OF binaries. It would have been useful if it was actually useful in diagnosing issues such as reboot loops, CFE crashing on boot and crashing during loading.
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Hypex
Re: How do you understand a CFE memory test?
Posted on: 2023/4/9 13:56    #5
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@noXLar

It does give a clue thanks. There is source with memory test commands which gives an indication what it is doing. But it does differ on X1000 so not fully clear what else it is doing.
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noXLar
Re: How do you understand a CFE memory test?
Posted on: 2023/4/9 15:17    #6
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@Hypex

okay..cool
Sam460ex 2GB 120Gb SSD&1Tb HD7750 Envy24HT A-Eon Drv 2.10+Warp3D New Uboot
Apollo v4 Standalone
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