Disable L2 caches for Trats and Trats2 devices.
It turns out that for data downloading with thordown command L2 cache disablement brings a significant speed improvement.
rootfs - 400 MiB: - L2 cache enabled: 2.69 MiB/s - L2 cache disabled: 5.56 MiB/s
Such improvement is possible due to reduction of the need to invalidate redundant data, which resides in L2 cache.
Since the sent USB request size at once is 512B (L1 - 32 KiB in total) - one can be quite confident that it is already available in L1 and L2 can be disabled.
Change-Id: I911ea18075526f7e8295c30dfcf7a658ebc4e53b Signed-off-by: Lukasz Majewski l.majewski@samsung.com --- include/configs/trats.h | 1 + include/configs/trats2.h | 1 + 2 files changed, 2 insertions(+)
diff --git a/include/configs/trats.h b/include/configs/trats.h index 0bdfe86..fdd8b46 100644 --- a/include/configs/trats.h +++ b/include/configs/trats.h @@ -27,6 +27,7 @@ #define CONFIG_DISPLAY_CPUINFO #define CONFIG_DISPLAY_BOARDINFO
+#define CONFIG_SYS_L2CACHE_OFF #ifndef CONFIG_SYS_L2CACHE_OFF #define CONFIG_SYS_L2_PL310 #define CONFIG_SYS_PL310_BASE 0x10502000 diff --git a/include/configs/trats2.h b/include/configs/trats2.h index 8e4b215..83633b0 100644 --- a/include/configs/trats2.h +++ b/include/configs/trats2.h @@ -30,6 +30,7 @@
#define CONFIG_SYS_CACHELINE_SIZE 32
+#define CONFIG_SYS_L2CACHE_OFF #ifndef CONFIG_SYS_L2CACHE_OFF #define CONFIG_SYS_L2_PL310 #define CONFIG_SYS_PL310_BASE 0x10502000