L2 cache is disabled, no monitor connected USB interrupts are disabled (echo 1 > /sys/devices/platform/bcm2708_usb/bussuspend) ssvb-membench v0.1.9 (simple benchmark for memory throughput and latency) =================================================================== == Memory bandwidth tests (non-aliased buffers) == == == == Note 1: 1MB = 1000000 bytes == == Note 2: Results for 'copy' tests show how many bytes can be == == copied per second (adding together read and writen == == bytes would have provided twice higher numbers) == =================================================================== C copy backwards : 161.02 MB/s C copy : 166.39 MB/s C copy prefetched (32 bytes step) : 437.83 MB/s C copy prefetched (64 bytes step) : 437.82 MB/s C copy via tmp buffer : 156.23 MB/s C copy via tmp buffer prefetched (32 bytes step) : 308.92 MB/s C copy via tmp buffer prefetched (64 bytes step) : 308.85 MB/s C fill : 1381.18 MB/s --- standard memcpy : 440.00 MB/s standard memset : 1381.72 MB/s --- ARM fill (STRD) : 1381.59 MB/s ARM fill (STM with 8 registers) : 1050.26 MB/s ARM fill (STM with 4 registers) : 1414.11 MB/s ARM copy prefetched : 475.21 MB/s ========================== == Memory latency test === ========================== block size : read access time (single random read / dual random read) 2 : 0.0 ns / 0.0 ns 4 : 0.0 ns / 0.0 ns 8 : 0.0 ns / 0.0 ns 16 : 0.0 ns / 0.0 ns 32 : 0.0 ns / 0.0 ns 64 : 0.0 ns / 0.0 ns 128 : 0.0 ns / 0.0 ns 256 : 0.0 ns / 0.0 ns 512 : 0.0 ns / 0.0 ns 1024 : 0.0 ns / 0.0 ns 2048 : 0.0 ns / 0.0 ns 4096 : 0.0 ns / 0.0 ns 8192 : 0.0 ns / 0.0 ns 16384 : 0.3 ns / 0.4 ns 32768 : 71.6 ns / 112.9 ns 65536 : 117.4 ns / 160.7 ns 131072 : 143.1 ns / 180.1 ns 262144 : 156.4 ns / 188.0 ns 524288 : 294.5 ns / 468.4 ns 1048576 : 363.8 ns / 613.2 ns 2097152 : 396.4 ns / 681.9 ns 4194304 : 416.0 ns / 722.9 ns 8388608 : 433.3 ns / 759.1 ns 16777216 : 444.4 ns / 782.1 ns 33554432 : 450.7 ns / 795.1 ns 67108864 : 453.4 ns / 800.7 ns --------------------------------------------------------------------- $ 7za b 7-Zip (A) 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20 (locale=en_GB.UTF-8,Utf16=on,HugeFiles=on,1 CPU) RAM size: 209 MB, # CPU hardware threads: 1 RAM usage: 107 MB, # Benchmark threads: 1 Dict Compressing | Decompressing Speed Usage R/U Rating | Speed Usage R/U Rating KB/s % MIPS MIPS | KB/s % MIPS MIPS 22: 172 100 167 167 | 4593 100 415 414 23: 164 100 167 167 | 4540 100 416 415 ---------------------------------------------------------------- Avr: 100 167 167 100 415 415 Tot: 100 291 291