On Thu, 28 Apr 2011 12:43:31 +0100, Maxim Levitsky <maximlevit...@gmail.com> 
wrote:

Martin, one more thing, this is my observations regarding clocks I
finished today:


clock = (ref * N / M) >> (P & 0x7)

first line is blob, second nouveau

level0:
                         P         NNMM
    0x4008 - memory - 0018e200 00002505   = 1           = 01.0000
                      80016400 00002505   = 37 / 5 / 2  = 03.7000

    0x4020 - shader - 80010000 00000b01   = 11 / 1 / 2  = 05.5000
                      80020000 00001b02   = 27 / 2 / 4  = 03.3750

    0x4028 - core   - a0120000 00001b04   = 27 / 4 / 4  = 01.6875
                      a0020000 00001b04   = 27 / 4 / 4  = 01.6875

    0x4030 - unk_05 - a0120000 00000b02   = 11 / 2 / 4  = 01.3750
                      80020000 00001b04   = 27 / 4 / 4  = 01.6875

level1:

    0x4008 - memory - 809ae400 00002505   = 37 / 5 / 4  = 01.8500
                      80026400 00002505   = 37 / 5 / 4  = 01.8500
   0x4020 - shader - 80000000 00000b01   = 11 / 1 / 1  = 11.0000
                      80010000 00000b01   = 11 / 1 / 2  = 05.5000
   0x4028 - core   - a0090000 00000b02   = 11 / 2 / 1  = 05.5000
                      a0010000 00000b02   = 11 / 2 / 1  = 05.5000

    0x4030 - unk_05 - a0120000 00000b02   = 11 / 2 / 4  = 01.3750
                      80010000 00000b02   = 11 / 2 / 2  = 05.5000

level2:

    0x4008 - memory - 8059e400 00002505   = 37 / 5 / 2  = 03.7000
                      80016400 00002505   = 37 / 5 / 2  = 03.7000

    0x4020 - shader - 80000000 00000b01   = 11 / 1 / 1  = 11.0000
                      80000000 00001002   = 16 / 2 / 1  = 08.0000

    0x4028 - core   - a0090000 00001002   = 16 / 2 / 2  = 04.0000
                      a0010000 00001002   = 16 / 2 / 2  = 04.0000

    0x4030 - unk_05 - a0120000 00000b02   = 11 / 2 / 4  = 01.3750
                      80010000 00001202   = 18 / 2 / 2  = 06.0000


Clocks are very different and we seems to overclock hard the unk_05 PLL
And shader PLL is underclocked always, so another way to boost performance?
(it didn't seem to affect perfomace much here, but yet...)



Maxim most likely you are tired of hearing this, but the shader PLL in many
cases is disabled(-ish)
Either by nv_wr32(dev, (nv_rd32(dev, 0x4020) & ~0x80000000)), or by the
0xc040 register (don't remember the exact bit)
Whereas for the unk_05 the logic of the blob has been changed in it's recent
versions - i.e. blob v195.xx the numbers(P/M/N) where the same as the nouveau

Cheers
Emil (xexaxo)
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