Information

Index of /raspbian/images

http://downloads.raspberrypi.org/raspbian/images/

Utils

1 Win32DiskImager

http://sourceforge.net/projects/win32diskimager/

2 putty install

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

1 #라즈베리파이 한글 폰트

Setup > cancel

Menu > preferances > Pi  configure >  wifi  country > us

Wifi setup

Open console

sudo apt-get update

1. 폰트 설치 sudo apt install fonts-nanum
2. 입력기 설치 sudo apt install fcitx-hangul -y
3. 입력기 지정 im-config -n fcitx

Menu > preferances > Pi  configure >   locale > ko (korea) EUC-KR Timezone > asia >seoul Keyboard > 105key > korea , korea Ok > Reboot

2 samba

$ sudo apt-get install samba samba-common-bin

Samba server and utilities -->  NO

$ sudo smbpasswd -a pi

$ sudo nano /etc/samba/smb.conf

[pi]
path = /home/pi
writeable=Yes
create mast=0777
directory mast=0777
public=no

$ sudo systemctl restart smbd



3 

information

$ cat /proc/version
$ cat /proc/cpuinfo
$ cat /proc/device-tree/model

라즈베리파이 3
OS: Linux version 4.14.98-v7+ (dom@dom-XPS-13-9370) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) 
#1200 SMP Tue Feb 12 20:27:48 GMT 2019
model name      : ARMv7 Processor rev 4 (v7l) Raspberry Pi 3 B+	(ARM)Quad Core 1.4GHz Cortex-A57 Broadcom BCM2837 64bit CPU
Hardware        : BCM2835
Revision        : a52082
Model: Raspberry Pi 3 Model B Rev 1.2

라즈베리파이 4
Os: Linux version 4.19.118-v7l+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) 
#1311 SMP Mon Apr 27 14:26:42 BST 2020
model name: ARMv7 Processor rev 3 (v7l) Cortex-A72 1.5GZ
Hardware: BCM2835
Revision: c03112 (4GB) /a03111 (1GB) / b03111 (2GB) / d03114 (8GB)
Model: Raspberry Pi 4 Model B Rev 1.2

라즈베리파이 성능 비교 분석
$ sudo apt install sysbench

$ sysbench --test=cpu run

라즈베리파이 3

Threads fairness:
events (avg/stddev):           10000.0000/0.00
execution time (avg/stddev):   139.0755/0.00

라즈베리파이 4

Threads fairness:
    events (avg/stddev):           10000.0000/0.00
    execution time (avg/stddev):   92.7153/0.00



$ sysbench --test=fileio --file-test-mode=seqwr run

라즈베리파이 3

Threads fairness:
events (avg/stddev):           131072.0000/0.00
execution time (avg/stddev):   171.7977/0.00


라즈베리파이 4

Threads fairness:
    events (avg/stddev):           58208.0000/0.00
    execution time (avg/stddev):   122.1220/0.00



멀티 쓰레드
sysbench --test=cpu --cpu-max-prime=10000 --num-threads=4 run

싱글 쓰레드
sysbench --test=cpu --cpu-max-prime=10000 --num-threads=1 run


멀티
3
Threads fairness:
events (avg/stddev):           2500.0000/9.35
execution time (avg/stddev):   34.9161/0.01


4
Threads fairness:
events (avg/stddev):           2500.0000/92.97
execution time (avg/stddev):   23.7309/0.00

싱글
3
Threads fairness:
events (avg/stddev):           10000.0000/0.00
execution time (avg/stddev):   139.6026/0.00

4
Threads fairness:
events (avg/stddev):           10000.0000/0.00
execution time (avg/stddev):   92.7026/0.00

git init

git add .

git commit -m "first"

git config user.email

git config user.name

git remote add origin https://github.com/sotoedu/mh_z19Co2.git

git push -u origin master