[Bug 72785] bfgminer --scrypt on 7xxx+

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=72785

--- Comment #34 from Luke-Jr <luke-jr+freedesktopbugs@utopios.org> ---
(In reply to Luke-Jr from comment #33)
> Looks like clEnqueueNDRangeKernel is re-compiling (or at least optimising?)
> the kernel, and taking a looooooooong time to do so. Isn't compiling
> supposed to be done *once* by clBuildProgram?

Also, seems it pisses off the hardware really bad when it finishes (although I
only have a 5850 and 6xxx for testing at the moment):

[  855.257659] radeon 0000:01:00.0: ring 3 stalled for more than 10000msec
[  855.257670] radeon 0000:01:00.0: GPU lockup (waiting for 0x000000000000963c
last fence id 0x000000000000963b on ring 3)
[  855.283709] dmar: DRHD: handling fault status reg 3
[  855.283730] dmar: DMAR:[DMA Read] Request device [01:00.0] fault addr
401df000 
DMAR:[fault reason 06] PTE Read access is not set
[  855.283734] radeon 0000:01:00.0: Saved 514 dwords of commands on ring 0.
[  855.283757] radeon 0000:01:00.0: GPU softreset: 0x0000000D
[  855.283762] radeon 0000:01:00.0:   GRBM_STATUS               = 0xB0433828
[  855.283766] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x08000007
[  855.283770] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  855.283773] radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
[  855.283776] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  855.283779] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  855.283783] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x400C0000
[  855.283799] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00050002
[  855.283803] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80268647
[  855.283813] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44483146
[  855.298675] radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00007F6B
[  855.298731] radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00100100
[  855.299894] radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
[  855.299898] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
[  855.299901] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  855.299904] radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
[  855.299908] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  855.299911] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  855.299914] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[  855.299918] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
[  855.299921] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
[  855.299924] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  855.299956] radeon 0000:01:00.0: GPU reset succeeded, trying to resume
[  855.322535] [drm] enabling PCIE gen 2 link speeds, disable with
radeon.pcie_gen2=0
[  855.323757] [drm] PCIE GART of 1024M enabled (table at 0x0000000000273000).
[  855.323855] radeon 0000:01:00.0: WB enabled
[  855.323859] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
0x0000000040000c00 and cpu addr 0xffff8800a7056c00
[  855.323862] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr
0x0000000040000c0c and cpu addr 0xffff8800a7056c0c
[  855.325391] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr
0x0000000000072118 and cpu addr 0xffffc900052b2118
[  855.341736] [drm] ring test on 0 succeeded in 3 usecs
[  855.341750] [drm] ring test on 3 succeeded in 1 usecs
[  855.519119] [drm] ring test on 5 succeeded in 2 usecs
[  855.519135] [drm] UVD initialized successfully.
[  855.523058] [drm] ib test on ring 0 succeeded in 0 usecs
[  855.523143] [drm] ib test on ring 3 succeeded in 1 usecs
[  855.675747] [drm] ib test on ring 5 succeeded

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