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| author | Boy Petersen <boypetersen@gmail.com> | 2013-06-24 16:25:56 +0200 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2014-12-16 02:15:35 +0100 |
| commit | 61c6c77b105e323514d56c786ef97b1e9e30df0b (patch) | |
| tree | 445e8ec658f6d0bd9b41fb01d331a9cf5467cdc5 /arch/arm | |
| parent | 84d447e30a9494d93eaff237aae0cba090c27a70 (diff) | |
| download | kernel_samsung_tuna-61c6c77b105e323514d56c786ef97b1e9e30df0b.zip kernel_samsung_tuna-61c6c77b105e323514d56c786ef97b1e9e30df0b.tar.gz kernel_samsung_tuna-61c6c77b105e323514d56c786ef97b1e9e30df0b.tar.bz2 | |
optimized LPDDR RAM timings (~10% throughput increase)
Tweaked the device's RAM timings. Benchmarks suggest a 10
percent thorughput improvement (RgBandwidth RAM misc benchmark;
threads: 1. 20 benchmark instances each, best result wins):
Stock Tweaked
Copy 1249.9 MB/s -> 1373.0 MB/s --> 9.86 % improvement
Scale 1084.8 MB/s -> 1188.1 MB/s --> 9.52 % improvement
Add 938.4 MB/s -> 1050.2 MB/s --> 11.91 % improvement
Triad 923.0 MB/s -> 1043.5 MB/s --> 13.06 % improvement
Change-Id: I082e7515d2995910b115c3fe0283fe25808d1cfb
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/board-tuna-emif.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/arm/mach-omap2/board-tuna-emif.c b/arch/arm/mach-omap2/board-tuna-emif.c index 84819ce..81509c0 100644 --- a/arch/arm/mach-omap2/board-tuna-emif.c +++ b/arch/arm/mach-omap2/board-tuna-emif.c @@ -17,11 +17,11 @@ const struct lpddr2_timings lpddr2_samsung_timings_400_mhz = { .max_freq = 400000000, - .RL = 6, - .tRPab = 21, - .tRCD = 18, - .tWR = 15, - .tRASmin = 42, + .RL = 5, + .tRPab = 14, + .tRCD = 14, + .tWR = 10, + .tRASmin = 30, .tRRD = 10, .tWTRx2 = 15, .tXSR = 140, @@ -41,10 +41,10 @@ const struct lpddr2_timings lpddr2_samsung_timings_400_mhz = { const struct lpddr2_timings lpddr2_samsung_timings_200_mhz = { .max_freq = 200000000, .RL = 3, - .tRPab = 21, - .tRCD = 18, - .tWR = 15, - .tRASmin = 42, + .tRPab = 14, + .tRCD = 14, + .tWR = 10, + .tRASmin = 30, .tRRD = 10, .tWTRx2 = 20, .tXSR = 140, |