Hi Manoj, On Mon, Jul 18 2011, Manoj Iyer wrote: > Here are the results with SanDisk SDSDXP1-016G-A75 16GB Extreme Pro > SDHC Memory Card. > > u@u:~/flashbench$ sudo ./flashbench -a /dev/mmcblk0p1 > [sudo] password for u: > align 4294967296 pre 1.16ms on 1.15ms post 1.15ms > diff -2024ns > align 2147483648 pre 1.2ms on 1.2ms post 1.2ms > diff 522ns > align 1073741824 pre 1.21ms on 1.2ms post 1.2ms > diff 570ns > align 536870912 pre 1.2ms on 1.2ms post 1.2ms diff 662ns > align 268435456 pre 1.2ms on 1.2ms post 1.2ms diff 404ns > align 134217728 pre 1.2ms on 1.2ms post 1.2ms diff > -1692ns > align 67108864 pre 1.15ms on 1.16ms post 1.16ms diff > 1.37µs > align 33554432 pre 1.18ms on 1.19ms post 1.15ms diff > 31.3µs > align 16777216 pre 1.17ms on 1.19ms post 1.15ms diff > 31.5µs > align 8388608 pre 1.17ms on 1.21ms post 1.18ms diff > 32.9µs > align 4194304 pre 1.37ms on 1.55ms post 1.17ms diff 274µs > align 2097152 pre 1.37ms on 1.37ms post 1.39ms diff > -7992ns > align 1048576 pre 1.33ms on 1.33ms post 1.34ms diff > -7793ns > align 524288 pre 1.33ms on 1.33ms post 1.34ms diff > -6641ns > align 262144 pre 1.34ms on 1.38ms post 1.35ms diff > 33.8µs > align 131072 pre 1.35ms on 1.37ms post 1.34ms diff > 27.2µs > align 65536 pre 1.34ms on 1.37ms post 1.34ms diff > 31.7µs > align 32768 pre 1.33ms on 1.37ms post 1.34ms diff > 32.5µs > > u@u:~/flashbench$ sudo ./flashbench -O --erasesize=$[4 * 1024 * 1024] > --blocksize=$[256 * 1024] /dev/mmcblk0p1 --open-au-nr=2 > 4MiB 23.2M/s > 2MiB 23.6M/s > 1MiB 23.5M/s > 512KiB 23.2M/s > 256KiB 23.2M/s > u@u:~/flashbench$ I don't understand whether these measurements are before or after your patch -- we're looking to see what the *difference* in performance is with the patch applied, right? Thanks, - Chris. -- Chris Ball <cjb@xxxxxxxxxx> <http://printf.net/> One Laptop Per Child -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
