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Date: Fri, 03 Jun 2011 07:03:57 +0200 From: Michael Reinelt <michael@...nelt.co.at> To: lkml <linux-kernel@...r.kernel.org> Subject: mtrr_cleanup: can not find optimal value Hi there, I'm suffering bad graphic performance on my notebook, and when sorting things out, I found the following in dmesg: mtrr_cleanup: can not find optimal value please specify mtrr_gran_size/mtrr_chunk_size and later: mtrr: type mismatch for e0000000,10000000 old: write-back new: write-combining [drm] MTRR allocation failed. Graphics performance may suffer. which is probably due to the fact that MTRR's can't be cleaned (at least I suspect so) The notebook is a Fujitsu Liefbook E8410, Intel Core2 Duo CPU T7700 @ 2.40GHz, and 8 GB RAM, graphics is Intel Mobile GM965/GL960, kernel is a vanilla 2.6.39 X86_64 When I remove 1 RAM module (using 4GB only) the messages above disappear. Unfortunately, graphic performance is still bad, but that's another story. I want to fix the MTRR issue anyway. I think the MTRR cleaner is unable to find a really optimal combination, and wants me to specify one of the sub-optimal configs. But I have no idea how to do that, and found nothing in the net. I found some references to a "mtrr-uncover" program, but I cannot compile it (probably because its too old). So I'm asking for some advice how to manually tune the MTRR's. When running with 4G, the relevant parts of dmesg are: MTRR default type: uncachable MTRR fixed ranges enabled: 00000-9FFFF write-back A0000-BFFFF uncachable C0000-CFFFF write-protect D0000-DFFFF uncachable E0000-FFFFF write-protect MTRR variable ranges enabled: 0 base 0D0000000 mask FF0000000 uncachable 1 base 0E0000000 mask FE0000000 uncachable 2 base 000000000 mask F00000000 write-back 3 base 100000000 mask FE0000000 write-back 4 base 120000000 mask FF0000000 write-back 5 base 0CF700000 mask FFFF00000 uncachable 6 base 0CF800000 mask FFF800000 uncachable 7 disabled x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 original variable MTRRs reg 0, base: 3328MB, range: 256MB, type UC reg 1, base: 3584MB, range: 512MB, type UC reg 2, base: 0GB, range: 4GB, type WB reg 3, base: 4GB, range: 512MB, type WB reg 4, base: 4608MB, range: 256MB, type WB reg 5, base: 3319MB, range: 1MB, type UC reg 6, base: 3320MB, range: 8MB, type UC total RAM covered: 4087M Found optimal setting for mtrr clean up gran_size: 64K chunk_size: 16M num_reg: 7 lose cover RAM: 0G New variable MTRRs reg 0, base: 0GB, range: 2GB, type WB reg 1, base: 2GB, range: 1GB, type WB reg 2, base: 3GB, range: 256MB, type WB reg 3, base: 3319MB, range: 1MB, type UC reg 4, base: 3320MB, range: 8MB, type UC reg 5, base: 4GB, range: 512MB, type WB reg 6, base: 4608MB, range: 256MB, type WB e820 update range: 00000000cf700000 - 0000000100000000 (usable) ==> (reserved) and with 8GB: MTRR default type: uncachable MTRR fixed ranges enabled: 00000-9FFFF write-back A0000-BFFFF uncachable C0000-CFFFF write-protect D0000-DFFFF uncachable E0000-FFFFF write-protect MTRR variable ranges enabled: 0 base 0D0000000 mask FF0000000 uncachable 1 base 0E0000000 mask FE0000000 uncachable 2 base 000000000 mask E00000000 write-back 3 base 200000000 mask FE0000000 write-back 4 base 220000000 mask FF0000000 write-back 5 base 0CF700000 mask FFFF00000 uncachable 6 base 0CF800000 mask FFF800000 uncachable 7 disabled x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 original variable MTRRs reg 0, base: 3328MB, range: 256MB, type UC reg 1, base: 3584MB, range: 512MB, type UC reg 2, base: 0GB, range: 8GB, type WB reg 3, base: 8GB, range: 512MB, type WB reg 4, base: 8704MB, range: 256MB, type WB reg 5, base: 3319MB, range: 1MB, type UC reg 6, base: 3320MB, range: 8MB, type UC total RAM covered: 8183M gran_size: 64K chunk_size: 64K num_reg: 8 lose cover RAM: 4865M gran_size: 64K chunk_size: 128K num_reg: 8 lose cover RAM: 4865M gran_size: 64K chunk_size: 256K num_reg: 8 lose cover RAM: 4865M gran_size: 64K chunk_size: 512K num_reg: 8 lose cover RAM: 4865M gran_size: 64K chunk_size: 1M num_reg: 8 lose cover RAM: 4865M gran_size: 64K chunk_size: 2M num_reg: 8 lose cover RAM: 4864M gran_size: 64K chunk_size: 4M num_reg: 8 lose cover RAM: 4864M gran_size: 64K chunk_size: 8M num_reg: 8 lose cover RAM: 4864M gran_size: 64K chunk_size: 16M num_reg: 8 lose cover RAM: 0G gran_size: 64K chunk_size: 32M num_reg: 8 lose cover RAM: 0G gran_size: 64K chunk_size: 64M num_reg: 8 lose cover RAM: 0G gran_size: 64K chunk_size: 128M num_reg: 8 lose cover RAM: 0G gran_size: 64K chunk_size: 256M num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 64K chunk_size: 512M num_reg: 8 lose cover RAM: -256M gran_size: 64K chunk_size: 1G num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 64K chunk_size: 2G num_reg: 8 lose cover RAM: -1G gran_size: 128K chunk_size: 128K num_reg: 8 lose cover RAM: 4865M gran_size: 128K chunk_size: 256K num_reg: 8 lose cover RAM: 4865M gran_size: 128K chunk_size: 512K num_reg: 8 lose cover RAM: 4865M gran_size: 128K chunk_size: 1M num_reg: 8 lose cover RAM: 4865M gran_size: 128K chunk_size: 2M num_reg: 8 lose cover RAM: 4864M gran_size: 128K chunk_size: 4M num_reg: 8 lose cover RAM: 4864M gran_size: 128K chunk_size: 8M num_reg: 8 lose cover RAM: 4864M gran_size: 128K chunk_size: 16M num_reg: 8 lose cover RAM: 0G gran_size: 128K chunk_size: 32M num_reg: 8 lose cover RAM: 0G gran_size: 128K chunk_size: 64M num_reg: 8 lose cover RAM: 0G gran_size: 128K chunk_size: 128M num_reg: 8 lose cover RAM: 0G gran_size: 128K chunk_size: 256M num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 128K chunk_size: 512M num_reg: 8 lose cover RAM: -256M gran_size: 128K chunk_size: 1G num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 128K chunk_size: 2G num_reg: 8 lose cover RAM: -1G gran_size: 256K chunk_size: 256K num_reg: 8 lose cover RAM: 4865M gran_size: 256K chunk_size: 512K num_reg: 8 lose cover RAM: 4865M gran_size: 256K chunk_size: 1M num_reg: 8 lose cover RAM: 4865M gran_size: 256K chunk_size: 2M num_reg: 8 lose cover RAM: 4864M gran_size: 256K chunk_size: 4M num_reg: 8 lose cover RAM: 4864M gran_size: 256K chunk_size: 8M num_reg: 8 lose cover RAM: 4864M gran_size: 256K chunk_size: 16M num_reg: 8 lose cover RAM: 0G gran_size: 256K chunk_size: 32M num_reg: 8 lose cover RAM: 0G gran_size: 256K chunk_size: 64M num_reg: 8 lose cover RAM: 0G gran_size: 256K chunk_size: 128M num_reg: 8 lose cover RAM: 0G gran_size: 256K chunk_size: 256M num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 256K chunk_size: 512M num_reg: 8 lose cover RAM: -256M gran_size: 256K chunk_size: 1G num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 256K chunk_size: 2G num_reg: 8 lose cover RAM: -1G gran_size: 512K chunk_size: 512K num_reg: 8 lose cover RAM: 4865M gran_size: 512K chunk_size: 1M num_reg: 8 lose cover RAM: 4865M gran_size: 512K chunk_size: 2M num_reg: 8 lose cover RAM: 4864M gran_size: 512K chunk_size: 4M num_reg: 8 lose cover RAM: 4864M gran_size: 512K chunk_size: 8M num_reg: 8 lose cover RAM: 4864M gran_size: 512K chunk_size: 16M num_reg: 8 lose cover RAM: 0G gran_size: 512K chunk_size: 32M num_reg: 8 lose cover RAM: 0G gran_size: 512K chunk_size: 64M num_reg: 8 lose cover RAM: 0G gran_size: 512K chunk_size: 128M num_reg: 8 lose cover RAM: 0G gran_size: 512K chunk_size: 256M num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 512K chunk_size: 512M num_reg: 8 lose cover RAM: -256M gran_size: 512K chunk_size: 1G num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 512K chunk_size: 2G num_reg: 8 lose cover RAM: -1G gran_size: 1M chunk_size: 1M num_reg: 8 lose cover RAM: 4865M gran_size: 1M chunk_size: 2M num_reg: 8 lose cover RAM: 4864M gran_size: 1M chunk_size: 4M num_reg: 8 lose cover RAM: 4864M gran_size: 1M chunk_size: 8M num_reg: 8 lose cover RAM: 4864M gran_size: 1M chunk_size: 16M num_reg: 8 lose cover RAM: 0G gran_size: 1M chunk_size: 32M num_reg: 8 lose cover RAM: 0G gran_size: 1M chunk_size: 64M num_reg: 8 lose cover RAM: 0G gran_size: 1M chunk_size: 128M num_reg: 8 lose cover RAM: 0G gran_size: 1M chunk_size: 256M num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 1M chunk_size: 512M num_reg: 8 lose cover RAM: -256M gran_size: 1M chunk_size: 1G num_reg: 8 lose cover RAM: 0G *BAD*gran_size: 1M chunk_size: 2G num_reg: 8 lose cover RAM: -1G gran_size: 2M chunk_size: 2M num_reg: 8 lose cover RAM: 4865M gran_size: 2M chunk_size: 4M num_reg: 8 lose cover RAM: 4865M gran_size: 2M chunk_size: 8M num_reg: 8 lose cover RAM: 4865M gran_size: 2M chunk_size: 16M num_reg: 8 lose cover RAM: 1M gran_size: 2M chunk_size: 32M num_reg: 8 lose cover RAM: 1M gran_size: 2M chunk_size: 64M num_reg: 8 lose cover RAM: 1M gran_size: 2M chunk_size: 128M num_reg: 8 lose cover RAM: 1M gran_size: 2M chunk_size: 256M num_reg: 8 lose cover RAM: 1M *BAD*gran_size: 2M chunk_size: 512M num_reg: 8 lose cover RAM: -255M gran_size: 2M chunk_size: 1G num_reg: 8 lose cover RAM: 1M *BAD*gran_size: 2M chunk_size: 2G num_reg: 8 lose cover RAM: -1023M gran_size: 4M chunk_size: 4M num_reg: 8 lose cover RAM: 771M gran_size: 4M chunk_size: 8M num_reg: 8 lose cover RAM: 4867M gran_size: 4M chunk_size: 16M num_reg: 8 lose cover RAM: 3M gran_size: 4M chunk_size: 32M num_reg: 8 lose cover RAM: 3M gran_size: 4M chunk_size: 64M num_reg: 8 lose cover RAM: 3M gran_size: 4M chunk_size: 128M num_reg: 8 lose cover RAM: 3M gran_size: 4M chunk_size: 256M num_reg: 8 lose cover RAM: 3M *BAD*gran_size: 4M chunk_size: 512M num_reg: 8 lose cover RAM: -253M gran_size: 4M chunk_size: 1G num_reg: 8 lose cover RAM: 3M *BAD*gran_size: 4M chunk_size: 2G num_reg: 8 lose cover RAM: -1021M gran_size: 8M chunk_size: 8M num_reg: 8 lose cover RAM: 263M gran_size: 8M chunk_size: 16M num_reg: 8 lose cover RAM: 263M gran_size: 8M chunk_size: 32M num_reg: 7 lose cover RAM: 7M gran_size: 8M chunk_size: 64M num_reg: 7 lose cover RAM: 7M gran_size: 8M chunk_size: 128M num_reg: 7 lose cover RAM: 7M gran_size: 8M chunk_size: 256M num_reg: 7 lose cover RAM: 7M gran_size: 8M chunk_size: 512M num_reg: 8 lose cover RAM: 7M gran_size: 8M chunk_size: 1G num_reg: 7 lose cover RAM: 7M gran_size: 8M chunk_size: 2G num_reg: 8 lose cover RAM: 7M gran_size: 16M chunk_size: 16M num_reg: 8 lose cover RAM: 263M gran_size: 16M chunk_size: 32M num_reg: 7 lose cover RAM: 7M gran_size: 16M chunk_size: 64M num_reg: 7 lose cover RAM: 7M gran_size: 16M chunk_size: 128M num_reg: 7 lose cover RAM: 7M gran_size: 16M chunk_size: 256M num_reg: 7 lose cover RAM: 7M gran_size: 16M chunk_size: 512M num_reg: 8 lose cover RAM: 7M gran_size: 16M chunk_size: 1G num_reg: 7 lose cover RAM: 7M gran_size: 16M chunk_size: 2G num_reg: 8 lose cover RAM: 7M gran_size: 32M chunk_size: 32M num_reg: 8 lose cover RAM: 23M gran_size: 32M chunk_size: 64M num_reg: 7 lose cover RAM: 23M gran_size: 32M chunk_size: 128M num_reg: 7 lose cover RAM: 23M gran_size: 32M chunk_size: 256M num_reg: 7 lose cover RAM: 23M gran_size: 32M chunk_size: 512M num_reg: 8 lose cover RAM: 23M gran_size: 32M chunk_size: 1G num_reg: 7 lose cover RAM: 23M gran_size: 32M chunk_size: 2G num_reg: 8 lose cover RAM: 23M gran_size: 64M chunk_size: 64M num_reg: 7 lose cover RAM: 55M gran_size: 64M chunk_size: 128M num_reg: 7 lose cover RAM: 55M gran_size: 64M chunk_size: 256M num_reg: 7 lose cover RAM: 55M gran_size: 64M chunk_size: 512M num_reg: 8 lose cover RAM: 55M gran_size: 64M chunk_size: 1G num_reg: 7 lose cover RAM: 55M gran_size: 64M chunk_size: 2G num_reg: 8 lose cover RAM: 55M gran_size: 128M chunk_size: 128M num_reg: 6 lose cover RAM: 119M gran_size: 128M chunk_size: 256M num_reg: 7 lose cover RAM: 119M gran_size: 128M chunk_size: 512M num_reg: 8 lose cover RAM: 119M gran_size: 128M chunk_size: 1G num_reg: 7 lose cover RAM: 119M gran_size: 128M chunk_size: 2G num_reg: 8 lose cover RAM: 119M gran_size: 256M chunk_size: 256M num_reg: 5 lose cover RAM: 247M gran_size: 256M chunk_size: 512M num_reg: 5 lose cover RAM: 247M gran_size: 256M chunk_size: 1G num_reg: 5 lose cover RAM: 247M gran_size: 256M chunk_size: 2G num_reg: 6 lose cover RAM: 247M gran_size: 512M chunk_size: 512M num_reg: 4 lose cover RAM: 503M gran_size: 512M chunk_size: 1G num_reg: 5 lose cover RAM: 503M gran_size: 512M chunk_size: 2G num_reg: 6 lose cover RAM: 503M gran_size: 1G chunk_size: 1G num_reg: 3 lose cover RAM: 1015M gran_size: 1G chunk_size: 2G num_reg: 3 lose cover RAM: 1015M gran_size: 2G chunk_size: 2G num_reg: 2 lose cover RAM: 2039M mtrr_cleanup: can not find optimal value please specify mtrr_gran_size/mtrr_chunk_size e820 update range: 00000000cf700000 - 0000000100000000 (usable) ==> (reserved) Am I right that a optimal config would be one that - is not marked as *BAD* - has no "lose cover RAM" - uses as few registers as possible? - leaves at least one spare reg for DRM? Thanks a bunch for your help! regards, Michael PS please CC me directly because I'm not subscribed! -- Michael Reinelt <michael@...nelt.co.at> http://home.pages.at/reinelt GPG-Key 0xDF13BA50 ICQ #288386781 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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