/*********************************************************************** * lmbench andlmbench 移植测试 * 说明： * 想要移植一下lmbench性能测试软件对Android系统性能进行测试，但发现 * Android的Linux shell命令太少了，总是出错，使用另外的busybox创建软链接， * 这样才能测试系统，目前没有自己去做busybox。 * * 2016-8-3 深圳 南山平山村 曾剑锋 **********************************************************************/ 一、参考文档： 1. android busybox解决adbshell命令不全 http://www.voidcn.com/blog/lhj0711010212/article/p-1515574.html 2. Busybox for android http://benno.id.au/blog/2007/11/14/android-busybox 3. Android Device中添加busybox http://haking.iteye.com/blog/1250500 4. Lmbench http://processors.wiki.ti.com/index.php/Lmbench 二、下载andlmbench https://github.com/shizkr/andlmbench 三、编译： ./remmm.sh /home/zengjf/cmd/andlmbench-master 四、运行： 1. 查看怎么运行（andlmbench-master/scripts/Android.mk): ifeq ($(BUILD_LMBENCH),true) LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := runlmbench LOCAL_SRC_FILES := $(LOCAL_MODULE) LOCAL_MODULE_CLASS := EXECUTABLES LOCAL_MODULE_TAGS := eng LOCAL_MODULE_PATH := $(TARGET_OUT_EXECUTABLES) include $(BUILD_PREBUILT) 2. 于是可以看出： 最终的可执行程序是runlmbench 五、错误： 1. error1： 1. 现象： root@android:/ # runlmbench /system/bin/runlmbench[393]: which: not found ERROR: dd doesn't exist to run lmbench tool!!! 2. 原因（cat runlmbench）： verifytools() { for tool in $1 do valid=$(which $tool | grep "" -c) if [ "$valid" != "1" ]; then echo "ERROR: $tool doesn't exist to run lmbench tool!!!" exit 1 fi done } 3. 测试which命令不存在： root@android:/ # which dd /system/bin/sh: which: not found root@android:/ # 4. 测试busybox which命令是否存在： root@android:/ # busybox which BusyBox v1.15.3 (2011-11-25 17:55:55 CST) multi-call binary Usage: which [COMMAND]... Locate a COMMAND root@android:/ # 2. error2: 1. 现象： root@android:/ # runlmbench ERROR: sed doesn't exist to run lmbench tool!!! 2. 测试sed命令： root@android:/ # sed /system/bin/sh: sed: not found 3. 原因： 本套Android系统中没有完整的Linux shell命令，可能要考虑使用busybox重新生成软链接才行。 4. 下载Android用的busybox： http://benno.id.au/blog/2007/11/14/android-busybox 5. 运行busybox --install . 报错： root@android:/data/local # ./busybox --install . busybox: /data/busybox/[: No such file or directory busybox: /data/busybox/[[: No such file or directory busybox: /data/busybox/addgroup: No such file or directory busybox: /data/busybox/adduser: No such file or directory busybox: /data/busybox/adjtimex: No such file or directory busybox: /data/busybox/ar: No such file or directory busybox: /data/busybox/arp: No such file or directory busybox: /data/busybox/arping: No such file or directory busybox: /data/busybox/ash: No such file or directory busybox: /data/busybox/awk: No such file or directory busybox: /data/busybox/basename: No such file or directory busybox: /data/busybox/bunzip2: No such file or directory busybox: /data/busybox/bzcat: No such file or directory busybox: /data/busybox/bzip2: No such file or directory busybox: /data/busybox/cal: No such file or directory busybox: /data/busybox/cat: No such file or directory busybox: /data/busybox/catv: No such file or directory busybox: /data/busybox/chattr: No such file or directory busybox: /data/busybox/chgrp: No such file or directory busybox: /data/busybox/chmod: No such file or directory busybox: /data/busybox/chown: No such file or directory busybox: /data/busybox/chpasswd: No such file or directory busybox: /data/busybox/chpst: No such file or directory busybox: /data/busybox/chroot: No such file or directory busybox: /data/busybox/chrt: No such file or directory busybox: /data/busybox/chvt: No such file or directory busybox: /data/busybox/cksum: No such file or directory busybox: /data/busybox/clear: No such file or directory busybox: /data/busybox/cmp: No such file or directory busybox: /data/busybox/comm: No such file or directory busybox: /data/busybox/cp: No such file or directory busybox: /data/busybox/cpio: No such file or directory busybox: /data/busybox/crond: No such file or directory busybox: /data/busybox/crontab: No such file or directory busybox: /data/busybox/cryptpw: No such file or directory busybox: /data/busybox/cut: No such file or directory busybox: /data/busybox/date: No such file or directory busybox: /data/busybox/dc: No such file or directory busybox: /data/busybox/dd: No such file or directory busybox: /data/busybox/deallocvt: No such file or directory busybox: /data/busybox/delgroup: No such file or directory busybox: /data/busybox/deluser: No such file or directory busybox: /data/busybox/df: No such file or directory busybox: /data/busybox/dhcprelay: No such file or directory busybox: /data/busybox/diff: No such file or directory busybox: /data/busybox/dirname: No such file or directory busybox: /data/busybox/dmesg: No such file or directory busybox: /data/busybox/dnsd: No such file or directory busybox: /data/busybox/dos2unix: No such file or directory busybox: /data/busybox/du: No such file or directory busybox: /data/busybox/dumpkmap: No such file or directory busybox: /data/busybox/dumpleases: No such file or directory busybox: /data/busybox/echo: No such file or directory busybox: /data/busybox/ed: No such file or directory busybox: /data/busybox/egrep: No such file or directory busybox: /data/busybox/eject: No such file or directory busybox: /data/busybox/env: No such file or directory busybox: /data/busybox/envdir: No such file or directory busybox: /data/busybox/envuidgid: No such file or directory busybox: /data/busybox/ether-wake: No such file or directory busybox: /data/busybox/expand: No such file or directory busybox: /data/busybox/expr: No such file or directory busybox: /data/busybox/fakeidentd: No such file or directory busybox: /data/busybox/false: No such file or directory busybox: /data/busybox/fbset: No such file or directory busybox: /data/busybox/fdflush: No such file or directory busybox: /data/busybox/fdformat: No such file or directory busybox: /data/busybox/fdisk: No such file or directory busybox: /data/busybox/fgrep: No such file or directory busybox: /data/busybox/find: No such file or directory busybox: /data/busybox/fold: No such file or directory busybox: /data/busybox/free: No such file or directory busybox: /data/busybox/freeramdisk: No such file or directory busybox: /data/busybox/fsck: No such file or directory busybox: /data/busybox/fsck.minix: No such file or directory busybox: /data/busybox/ftpget: No such file or directory busybox: /data/busybox/ftpput: No such file or directory busybox: /data/busybox/fuser: No such file or directory busybox: /data/busybox/getopt: No such file or directory busybox: /data/busybox/getty: No such file or directory busybox: /data/busybox/grep: No such file or directory busybox: /data/busybox/gunzip: No such file or directory busybox: /data/busybox/gzip: No such file or directory busybox: /data/busybox/halt: No such file or directory busybox: /data/busybox/hdparm: No such file or directory busybox: /data/busybox/head: No such file or directory busybox: /data/busybox/hexdump: No such file or directory busybox: /data/busybox/hostid: No such file or directory busybox: /data/busybox/hostname: No such file or directory busybox: /data/busybox/httpd: No such file or directory busybox: /data/busybox/hwclock: No such file or directory busybox: /data/busybox/id: No such file or directory busybox: /data/busybox/ifconfig: No such file or directory busybox: /data/busybox/ifdown: No such file or directory busybox: /data/busybox/ifup: No such file or directory busybox: /data/busybox/inetd: No such file or directory busybox: /data/busybox/init: No such file or directory busybox: /data/busybox/insmod: No such file or directory busybox: /data/busybox/install: No such file or directory busybox: /data/busybox/ip: No such file or directory busybox: /data/busybox/ipaddr: No such file or directory busybox: /data/busybox/ipcalc: No such file or directory busybox: /data/busybox/ipcrm: No such file or directory busybox: /data/busybox/ipcs: No such file or directory busybox: /data/busybox/iplink: No such file or directory busybox: /data/busybox/iproute: No such file or directory busybox: /data/busybox/iprule: No such file or directory busybox: /data/busybox/iptunnel: No such file or directory busybox: /data/busybox/kbd_mode: No such file or directory busybox: /data/busybox/kill: No such file or directory busybox: /data/busybox/killall: No such file or directory busybox: /data/busybox/killall5: No such file or directory busybox: /data/busybox/klogd: No such file or directory busybox: /data/busybox/last: No such file or directory busybox: /data/busybox/length: No such file or directory busybox: /data/busybox/less: No such file or directory busybox: /data/busybox/linux32: No such file or directory busybox: /data/busybox/linux64: No such file or directory busybox: /data/busybox/linuxrc: No such file or directory busybox: /data/busybox/ln: No such file or directory busybox: /data/busybox/loadfont: No such file or directory busybox: /data/busybox/loadkmap: No such file or directory busybox: /data/busybox/logger: No such file or directory busybox: /data/busybox/login: No such file or directory busybox: /data/busybox/logname: No such file or directory busybox: /data/busybox/logread: No such file or directory busybox: /data/busybox/losetup: No such file or directory busybox: /data/busybox/ls: No such file or directory busybox: /data/busybox/lsattr: No such file or directory busybox: /data/busybox/lsmod: No such file or directory busybox: /data/busybox/lzmacat: No such file or directory busybox: /data/busybox/makedevs: No such file or directory busybox: /data/busybox/md5sum: No such file or directory busybox: /data/busybox/mdev: No such file or directory busybox: /data/busybox/mesg: No such file or directory busybox: /data/busybox/microcom: No such file or directory busybox: /data/busybox/mkdir: No such file or directory busybox: /data/busybox/mkfifo: No such file or directory busybox: /data/busybox/mkfs.minix: No such file or directory busybox: /data/busybox/mknod: No such file or directory busybox: /data/busybox/mkswap: No such file or directory busybox: /data/busybox/mktemp: No such file or directory busybox: /data/busybox/modprobe: No such file or directory busybox: /data/busybox/more: No such file or directory busybox: /data/busybox/mount: No such file or directory busybox: /data/busybox/mountpoint: No such file or directory busybox: /data/busybox/mt: No such file or directory busybox: /data/busybox/mv: No such file or directory busybox: /data/busybox/nameif: No such file or directory busybox: /data/busybox/nc: No such file or directory busybox: /data/busybox/netstat: No such file or directory busybox: /data/busybox/nice: No such file or directory busybox: /data/busybox/nmeter: No such file or directory busybox: /data/busybox/nohup: No such file or directory busybox: /data/busybox/nslookup: No such file or directory busybox: /data/busybox/od: No such file or directory busybox: /data/busybox/openvt: No such file or directory busybox: /data/busybox/passwd: No such file or directory busybox: /data/busybox/patch: No such file or directory busybox: /data/busybox/pgrep: No such file or directory busybox: /data/busybox/pidof: No such file or directory busybox: /data/busybox/ping: No such file or directory busybox: /data/busybox/ping6: No such file or directory busybox: /data/busybox/pipe_progress: No such file or directory busybox: /data/busybox/pivot_root: No such file or directory busybox: /data/busybox/pkill: No such file or directory busybox: /data/busybox/poweroff: No such file or directory busybox: /data/busybox/printenv: No such file or directory busybox: /data/busybox/printf: No such file or directory busybox: /data/busybox/ps: No such file or directory busybox: /data/busybox/pscan: No such file or directory busybox: /data/busybox/pwd: No such file or directory busybox: /data/busybox/raidautorun: No such file or directory busybox: /data/busybox/rdate: No such file or directory busybox: /data/busybox/readlink: No such file or directory busybox: /data/busybox/readprofile: No such file or directory busybox: /data/busybox/realpath: No such file or directory busybox: /data/busybox/reboot: No such file or directory busybox: /data/busybox/renice: No such file or directory busybox: /data/busybox/reset: No such file or directory busybox: /data/busybox/resize: No such file or directory busybox: /data/busybox/rm: No such file or directory busybox: /data/busybox/rmdir: No such file or directory busybox: /data/busybox/rmmod: No such file or directory busybox: /data/busybox/route: No such file or directory busybox: /data/busybox/rpm: No such file or directory busybox: /data/busybox/rpm2cpio: No such file or directory busybox: /data/busybox/run-parts: No such file or directory busybox: /data/busybox/runlevel: No such file or directory busybox: /data/busybox/runsv: No such file or directory busybox: /data/busybox/runsvdir: No such file or directory busybox: /data/busybox/rx: No such file or directory busybox: /data/busybox/sed: No such file or directory busybox: /data/busybox/seq: No such file or directory busybox: /data/busybox/setarch: No such file or directory busybox: /data/busybox/setconsole: No such file or directory busybox: /data/busybox/setkeycodes: No such file or directory busybox: /data/busybox/setlogcons: No such file or directory busybox: /data/busybox/setsid: No such file or directory busybox: /data/busybox/setuidgid: No such file or directory busybox: /data/busybox/sh: No such file or directory busybox: /data/busybox/sha1sum: No such file or directory busybox: /data/busybox/slattach: No such file or directory busybox: /data/busybox/sleep: No such file or directory busybox: /data/busybox/softlimit: No such file or directory busybox: /data/busybox/sort: No such file or directory busybox: /data/busybox/split: No such file or directory busybox: /data/busybox/start-stop-daemon: No such file or directory busybox: /data/busybox/stat: No such file or directory busybox: /data/busybox/strings: No such file or directory busybox: /data/busybox/stty: No such file or directory busybox: /data/busybox/su: No such file or directory busybox: /data/busybox/sulogin: No such file or directory busybox: /data/busybox/sum: No such file or directory busybox: /data/busybox/sv: No such file or directory busybox: /data/busybox/svlogd: No such file or directory busybox: /data/busybox/swapoff: No such file or directory busybox: /data/busybox/swapon: No such file or directory busybox: /data/busybox/switch_root: No such file or directory busybox: /data/busybox/sync: No such file or directory busybox: /data/busybox/sysctl: No such file or directory busybox: /data/busybox/syslogd: No such file or directory busybox: /data/busybox/tail: No such file or directory busybox: /data/busybox/tar: No such file or directory busybox: /data/busybox/taskset: No such file or directory busybox: /data/busybox/tcpsvd: No such file or directory busybox: /data/busybox/tee: No such file or directory busybox: /data/busybox/telnet: No such file or directory busybox: /data/busybox/telnetd: No such file or directory busybox: /data/busybox/test: No such file or directory busybox: /data/busybox/tftp: No such file or directory busybox: /data/busybox/time: No such file or directory busybox: /data/busybox/top: No such file or directory busybox: /data/busybox/touch: No such file or directory busybox: /data/busybox/tr: No such file or directory busybox: /data/busybox/traceroute: No such file or directory busybox: /data/busybox/true: No such file or directory busybox: /data/busybox/tty: No such file or directory busybox: /data/busybox/ttysize: No such file or directory busybox: /data/busybox/udhcpc: No such file or directory busybox: /data/busybox/udhcpd: No such file or directory busybox: /data/busybox/udpsvd: No such file or directory busybox: /data/busybox/umount: No such file or directory busybox: /data/busybox/uname: No such file or directory busybox: /data/busybox/uncompress: No such file or directory busybox: /data/busybox/unexpand: No such file or directory busybox: /data/busybox/uniq: No such file or directory busybox: /data/busybox/unix2dos: No such file or directory busybox: /data/busybox/unlzma: No such file or directory busybox: /data/busybox/unzip: No such file or directory busybox: /data/busybox/uptime: No such file or directory busybox: /data/busybox/usleep: No such file or directory busybox: /data/busybox/uudecode: No such file or directory busybox: /data/busybox/uuencode: No such file or directory busybox: /data/busybox/vconfig: No such file or directory busybox: /data/busybox/vi: No such file or directory busybox: /data/busybox/vlock: No such file or directory busybox: /data/busybox/watch: No such file or directory busybox: /data/busybox/watchdog: No such file or directory busybox: /data/busybox/wc: No such file or directory busybox: /data/busybox/wget: No such file or directory busybox: /data/busybox/which: No such file or directory busybox: /data/busybox/who: No such file or directory busybox: /data/busybox/whoami: No such file or directory busybox: /data/busybox/xargs: No such file or directory busybox: /data/busybox/yes: No such file or directory busybox: /data/busybox/zcat: No such file or directory busybox: /data/busybox/zcip: No such file or directory 6. 创建/data/busybox目录，给777权限，导入PATH： root@android:/data/local # mkdir /data/busybox root@android:/data/local # chmod 777 /data/busybox root@android:/data/local # echo $PATH /sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin:/data/busybox/ root@android:/data/local # 7. 测试which可用： root@android:/data/busybox # ./which BusyBox v1.8.1 (2007-11-14 10:11:37 EST) multi-call binary Usage: which [COMMAND ...] Locate a COMMAND 1|root@android:/data/busybox # 六、输出结果： root@android:/data/busybox # runlmbench ############################### LMBENCH MEASUREMENT ############################### 262144+0 records in 262144+0 records out 134217728 bytes transferred in 13.776 secs (9742866 bytes/sec) [LMBENCH_VER 3.0-a9] [CPU: ] [Processors: 2] [OS: Linux localhost 3.0.35-g6774ed9-dirty #907 SMP PREEMPT Tue Aug 2 17:55:21 CST 2016 armv7l unknown] [BOARD: ] [PLATFORM: imx6] [HARDWARE: freescale] [ANDROID VER: 4.2.2] [KERNEL VER: ] [mhz: 995 MHz, 1.0050 nanosec clock] [MemTotal: 780300 kB] [MB for test: 128M] [ENOUGH: 5000] Simple syscall: 0.2757 microseconds Simple read: 0.7436 microseconds Simple write: 0.6949 microseconds Simple stat: 2.1404 microseconds Simple fstat: 0.6601 microseconds Simple open/close: 4.8364 microseconds Signal handler installation: 0.3585 microseconds Signal handler overhead: 2.9374 microseconds Protection fault: 1.0261 microseconds Pipe latency: 14.7370 microseconds Pipe band 578.23 MB/sec AF_UNIX sock stream latency: 24.0603 microseconds AF_UNIX sock stream band 644.49 MB/sec Process fork+exit: 478.2500 microseconds Process fork+execve: 496.3000 microseconds Process fork+/bin/sh -c: 511.5000 microseconds Procedure call: 0.0101 microseconds Pagefaults on /data/file.tmp: 2.7930 microseconds ------------------------------ 1. BANDWIDTH MEASUREMENT ------------------------------ bw_file_rd ========== MB MB/s 0.000512 64.28 0.001024 121.46 0.002048 226.82 0.004096 380.00 0.008192 384.49 0.016384 459.90 0.032768 430.53 0.065536 435.18 0.131072 444.07 0.262144 433.85 0.524288 348.36 1.05 305.71 2.10 299.46 4.19 302.36 8.39 301.19 16.78 303.40 33.55 302.28 67.11 301.53 134.22 311.41 bw_mem ====== MB MB/s memory read bandwidth --------------------- MB MB/s 0.000512 11069.90 0.001024 11840.93 0.002048 12345.39 0.004096 12611.07 0.008192 12549.55 0.016384 12658.47 0.032768 4714.99 0.065536 2294.66 0.131072 1961.30 0.262144 1883.22 0.524288 1172.25 1.05 568.85 2.10 507.23 4.19 501.71 8.39 501.68 16.78 502.00 33.55 501.88 67.11 502.17 134.22 502.34 memory write bandwidth --------------------- MB MB/s 0.000512 11844.63 0.001024 12273.09 0.002048 12490.38 0.004096 12613.38 0.008192 12572.80 0.016384 12572.38 0.032768 4081.81 0.065536 2556.62 0.131072 2080.89 0.262144 2049.49 0.524288 1290.62 1.05 458.63 2.10 422.90 4.19 426.99 8.39 427.90 16.78 428.73 33.55 428.86 67.11 429.02 134.22 429.15 bw_mmap_rd ========== MB MB/s mmap read bandwidth --------------------- MB MB/s 0.000512 2950.66 0.001024 3085.22 0.002048 3138.08 0.004096 3174.29 0.008192 3133.86 0.016384 3161.77 0.032768 1812.75 0.065536 996.43 0.131072 897.27 0.262144 882.14 0.524288 628.27 1.05 384.80 2.10 359.84 4.19 353.77 8.39 356.51 16.78 356.51 33.55 356.83 67.11 356.75 134.22 356.78 mmap read open2close bandwidth --------------------- MB MB/s 0.000512 20.05 0.001024 39.93 0.002048 78.78 0.004096 153.27 0.008192 240.38 0.016384 416.78 0.032768 482.55 0.065536 472.14 0.131072 506.07 0.262144 513.91 0.524288 370.13 1.05 293.23 2.10 284.24 4.19 284.77 8.39 286.97 16.78 287.18 33.55 288.00 67.11 287.57 134.22 287.78 ------------------------------ 2. LATENCY MEASUREMENTS ------------------------------ lat_cmd ========== lat_cmd: 724.5556 microseconds lat_cmd: 784.7500 microseconds lat_mem_rd ========== "stride=128 0.00049 4.446 0.00098 4.528 0.00195 4.666 0.00293 4.546 0.00391 4.576 0.00586 4.447 0.00781 4.473 0.01172 4.470 0.01562 4.523 0.02344 4.470 0.03125 19.277 0.04688 22.169 0.06250 28.072 0.09375 34.498 0.12500 36.779 0.18750 38.253 0.25000 38.928 0.37500 45.304 0.50000 70.303 0.75000 106.495 1.00000 130.767 1.50000 144.957 2.00000 145.493 3.00000 144.752 4.00000 151.140 6.00000 147.697 8.00000 143.338 lat_mmap ========== MB usecs 1.048576 47 2.097152 73 4.194304 128 8.388608 251 16.777216 497 33.554432 978 67.108864 6685 134.217728 267039 lat_ops ========== integer bit: 1.13 nanoseconds integer add: 1.03 nanoseconds integer mul: 4.85 nanoseconds integer div: 83.28 nanoseconds integer mod: 26.31 nanoseconds int64 bit: 2.07 nanoseconds uint64 add: 4.25 nanoseconds int64 mul: 15.15 nanoseconds int64 div: 281.46 nanoseconds int64 mod: 157.47 nanoseconds float add: 4.09 nanoseconds float mul: 6.05 nanoseconds float div: 16.02 nanoseconds double add: 4.09 nanoseconds double mul: 7.06 nanoseconds double div: 26.10 nanoseconds float bogomflops: 15.13 nanoseconds double bogomflops: 27.08 nanoseconds lat_usleep ========== usleep 10 microseconds: 107.4792 microseconds usleep 100 microseconds: 163.6364 microseconds usleep 1000 microseconds: 1073.0826 microseconds nanosleep 10 microseconds: 104.8627 microseconds nanosleep 100 microseconds: 165.7500 microseconds nanosleep 1000 microseconds: 1068.5000 microseconds select 10 microseconds: 109.9130 microseconds select 100 microseconds: 164.8750 microseconds select 1000 microseconds: 1081.1441 microseconds itimer 10 microseconds: 63.0148 microseconds itimer 100 microseconds: 123.6591 microseconds itimer 1000 microseconds: 1025.8333 microseconds lat_fs ========== size of file, number created, creations per second, removals per second 0k 21622 16174 14938 1k 12412 9337 4065 4k 14594 2913 6560 10k 10341 914 5631 lat_ctx ========== size, ovr: non-context switching overhead(usec) number of processes, cost of context switch(usec) "size=0k ovr=6.23 2 8.24 "size=0k ovr=6.21 4 8.65 "size=0k ovr=6.16 8 9.36 "size=0k ovr=6.04 16 10.75 "size=0k ovr=5.87 20 10.83 "size=128k ovr=214.22 2 42.49 "size=128k ovr=202.56 4 184.57 "size=128k ovr=208.57 8 220.67 "size=128k ovr=181.71 16 260.47 "size=128k ovr=187.81 20 252.39 ------------------------------ 3. OTHER MEASUREMENTS ------------------------------ par_ops --------------------- 0.004096 5.26 0.008192 9.78 0.016384 3.54 0.032768 4.94 0.065536 3.88 0.131072 4.40 0.262144 13.71 0.524288 3.84 stream --------------------- STREAM copy latency: 10.44 nanoseconds STREAM copy band 1532.93 MB/sec STREAM scale latency: 15.34 nanoseconds STREAM scale band 1042.70 MB/sec STREAM add latency: 18.25 nanoseconds STREAM add band 1315.31 MB/sec STREAM triad latency: 20.41 nanoseconds STREAM triad band 1176.04 MB/sec tlb --------------------- tlb: 33 pages cache --------------------- ...... L1 cache: 32768 bytes 4.48 nanoseconds 64 linesize 3.95 parallelism Memory latency: 187.58 nanoseconds 2.01 parallelism root@android:/data/busybox #