ARC: [axs101] Tweak DDR port aperture mappings for performance

Route all MB originated traffic to DDR Port 1 and keep Port 0 for CPU traffic only Basic system parameters -------------------------------------------------------------------------------------- Host OS Description Mhz tlb cache mem scal pages line par load bytes ----------------- ------------- --------------------------------------- ---- ----- ----- ------ ---- axs101-sd-2-new-f Linux 3.13.0+ axs101-sd-2-new-fw-old-img-rerun 739 8 32 1.1100 1 axs101-sd-3-arc-3 Linux 3.13.9+ axs101-sd-3-arc-3.13-tip-regression 735 8 32 1.1000 1 axs101-sd-9-diffe Linux 3.13.11 axs101-sd-9-different-tweak 740 8 32 1.0000 1 Processor, Processes - times in microseconds - smaller is better ------------------------------------------------------------------------------ Host OS Mhz null null open slct sig sig fork exec sh call I/O stat clos TCP inst hndl proc proc proc --------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- axs101-sd Linux 3.13.0+ 739 0.50 0.88 5.38 14.6 34.1 0.92 5.18 2135 6555 12.K axs101-sd Linux 3.13.9+ 735 0.50 0.90 5.89 19.2 81.4 0.94 4.08 2560 8559 15.K axs101-sd Linux 3.13.11 740 0.50 0.88 4.45 17.8 34.4 0.94 3.25 2052 6493 12.K ^^^^ ^^^^ Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

ARC: [axs101] Tweak DDR port aperture mappings for performance
Route all MB originated traffic to DDR Port 1 and keep Port 0 for CPU traffic only Basic system parameters -------------------------------------------------------------------------------------- Host OS Description Mhz tlb cache mem scal pages line par load bytes ----------------- ------------- --------------------------------------- ---- ----- ----- ------ ---- axs101-sd-2-new-f Linux 3.13.0+ axs101-sd-2-new-fw-old-img-rerun 739 8 32 1.1100 1 axs101-sd-3-arc-3 Linux 3.13.9+ axs101-sd-3-arc-3.13-tip-regression 735 8 32 1.1000 1 axs101-sd-9-diffe Linux 3.13.11 axs101-sd-9-different-tweak 740 8 32 1.0000 1 Processor, Processes - times in microseconds - smaller is better ------------------------------------------------------------------------------ Host OS Mhz null null open slct sig sig fork exec sh call I/O stat clos TCP inst hndl proc proc proc --------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- axs101-sd Linux 3.13.0+ 739 0.50 0.88 5.38 14.6 34.1 0.92 5.18 2135 6555 12.K axs101-sd Linux 3.13.9+ 735 0.50 0.90 5.89 19.2 81.4 0.94 4.08 2560 8559 15.K axs101-sd Linux 3.13.11 740 0.50 0.88 4.45 17.8 34.4 0.94 3.25 2052 6493 12.K ^^^^ ^^^^ Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
749aa0e1 · Vineet Gupta · 8d0d56ba · 749aa0e1
Commit 749aa0e1 authored May 27, 2014 by Vineet Gupta
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arch/arc/plat-axs10x/axs10x.c arch/arc/plat-axs10x/axs10x.c +4 -4

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--- a/arch/arc/plat-axs10x/axs10x.c
+++ b/arch/arc/plat-axs10x/axs10x.c
@@ -173,8 +173,8 @@ static const struct aperture axc001_memmap[16] = {
 	{AXC001_SLV_NONE,		0x0},
 	{AXC001_SLV_DDR_PORT0,		0x0}, /* 0x8000_0000: DDR   0..256M */
 	{AXC001_SLV_DDR_PORT0,		0x1}, /* 0x9000_0000: DDR 256..512M */
-	{AXC001_SLV_DDR_PORT1,		0x0},
-	{AXC001_SLV_DDR_PORT1,		0x1},
+	{AXC001_SLV_DDR_PORT0,		0x2},
+	{AXC001_SLV_DDR_PORT0,		0x3},
 	{AXC001_SLV_NONE,		0x0},
 	{AXC001_SLV_AXI_TUNNEL,		0xD},
 	{AXC001_SLV_AXI_TUNNEL,		0xE}, /* MB: CREG, CGU... */
@@ -194,10 +194,10 @@ static const struct aperture axc001_axi_tunnel_memmap[16] = {
 	{AXC001_SLV_NONE,		0x0},
 	{AXC001_SLV_NONE,		0x0},
 	{AXC001_SLV_NONE,		0x0},
-	{AXC001_SLV_DDR_PORT0,		0x0},
-	{AXC001_SLV_DDR_PORT0,		0x1},
 	{AXC001_SLV_DDR_PORT1,		0x0},
 	{AXC001_SLV_DDR_PORT1,		0x1},
+	{AXC001_SLV_DDR_PORT1,		0x2},
+	{AXC001_SLV_DDR_PORT1,		0x3},
 	{AXC001_SLV_NONE,		0x0},
 	{AXC001_SLV_AXI_TUNNEL,		0xD},
 	{AXC001_SLV_AXI_TUNNEL,		0xE},