/***********************************************************************
* 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 bandwidth: 578.23 MB/sec
AF_UNIX sock stream latency: 24.0603 microseconds
AF_UNIX sock stream bandwidth: 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 bandwidth: 1532.93 MB/sec
STREAM scale latency: 15.34 nanoseconds
STREAM scale bandwidth: 1042.70 MB/sec
STREAM add latency: 18.25 nanoseconds
STREAM add bandwidth: 1315.31 MB/sec
STREAM triad latency: 20.41 nanoseconds
STREAM triad bandwidth: 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 #
时间： 2024-10-27 01:32:38