wpewebkit

BR2_PACKAGE_ICU [=y] 

BR2_PACKAGE_JPEG [=y] 

BR2_PACKAGE_LIBEPOXY [=n]

BR2_PACKAGE_LIBGCRYPT [=n] && 

 BR2_PACKAGE_HAS_LIBGLES [=n] 

BR2_PACKAGE_HAS_LIBEGL [=n] 

BR2_PACKAGE_HAS_LIBEGL_WAYLAND [=n] 

BR2_PACKAGE_LIBTASN1 [=n]

BR2_PACKAGE_LIBXSLT [=n] 

BR2_PACKAGE_OPENJPEG [=n] 

BR2_PACKAGE_WAYLAND [=y]

 BR2_PACKAGE_WEBP [=n]

BR2_PACKAGE_WEBP_DEMUX [=n] 

BR2_PACKAGE_WPEBACKEND_FDO [=n] 

libsigsegv

output/build/host-m4-1.4.18/lib/c-stack.c

#ifndef SIGSTKSZ

#define SIGSTKSZ 16384

#endif

#undef SIGSTKSZ

#define SIGSTKSZ 16384

output/build/host-fakeroot-1.20.2/communicate.h

#if !defined(__GLIBC__) || __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 33

#define stat64 stat

#endif

package/fakeroot/fakeroot.mk

FAKEROOT_VERSION = 1.37.1.2

FAKEROOT_SOURCE = fakeroot_$(FAKEROOT_VERSION).orig.tar.gz

FAKEROOT_SITE = https://deb.debian.org/debian/pool/main/f/fakeroot

package/fakeroot/fakeroot.hash

sha256 959496928c8a676ec8377f665ff6a19a707bfad693325f9cc4a4126642f53224  fakeroot_1.37.1.2.orig.tar.gz


make host-libglib2 host-fakeroot
--------------------
toolchain
 [*] Enable C++ support                                                                            │ │

Build options ─────
libraries (shared only)  --->  

 Target packages  --->

 Graphic applications

BR2_PACKAGE_HAS_LIBGLES

BR2_PACKAGE_HAS_LIBEGL

Valgrind

valgrind: failed to start tool 'massif' for platform 'arm64-linux': No such file or directory

 export VALGRIND_LIB=/out/libexec/valgrind

v.sh

/mnt/sd/v/out/bin/valgrind \

    --tool=massif \

    --massif-out-file=/mnt/sd/v/massif_ls.out \

    --time-unit=B \

    --heap=yes \

    --max-snapshots=500 \

    vendor_3a_sample;

OUTFILE="$1"

echo "Snapshot Total Useful Extra"

awk '

  /^snapshot=/ { snap=$0 }

  /^mem_heap_B=/ { heap=substr($0, index($0,"=")+1) }

  /^mem_heap_extra_B=/ { extra=substr($0, index($0,"=")+1)

    total=heap+extra

    print snap, total, heap, extra

  }

' "$OUTFILE"

~

gitlab-ci-local

eval .gitlab-ci.yml

 TARGET_STAGE=daily gitlab-ci-local --variable TARGET_STAGE=daily

gitlab-ci-local

SNMP介绍及使用，超有用，建议收藏！

 https://www.cnblogs.com/chegxy/p/14020233.html

net snmp

 /etc/snmp/snmpd.conf

rocommunity public

agentAddress udp:161

pass .1.3.6.1.4.1.55554 /bin/bash /snmp.sh

 /snmp.sh

#!/bin/bash

opt=$1

oid=$2

echo "$(date) - called with opt=$opt oid=$oid" >> /tmp/snmp_script.log

if [ "$opt" = "-g" ]; then

  case "$oid" in

    ".1.3.6.1.4.1.55554.1.1.0")

      echo "$oid"

      echo "INTEGER"

      echo "1"

      ;;

    ".1.3.6.1.4.1.55554.1.2.0")

      echo "$oid"

      echo "STRING"

      echo "IPCamModelX"

      ;;

    *)

      exit 1

      ;;

  esac

elif [ "$opt" = "-n" ]; then

  # 簡單示範，回傳下一個 OID

  if [ "$oid" = ".1.3.6.1.4.1.55554.1.1.0" ]; then

    echo ".1.3.6.1.4.1.55554.1.2.0"

    echo "STRING"

    echo "IPCamModelX"

  else

    exit 1

  fi

elif [ "$opt" = "-s" ]; then

  # 如果要支援 set，這邊寫set邏輯

  exit 1

else

  exit 1

fi

Agent

 /usr/sbin/snmpd -V -f -Lo -C -c /etc/snmp/snmpd.conf -Dpass,persist,mib_modules

Client

snmpwalk -v2c -c public localhost .1.3.6.1.4.1.55554.1.1.0

Output

iso.3.6.1.4.1.55554.1.1.0 = INTEGER: 1

Pure RTSP over Websocket Player build in browser

 https://anzal.hashnode.dev/a-beginners-guide-to-rtsp-streaming-with-websockets-using-nodejs-and-ffmpeg

A Beginner’s Guide to RTSP Streaming with WebSockets Using Node.js and FFmpeg.

内存泄漏定位工具之 valgrind

 https://blog.csdn.net/weixin_45631738/article/details/129541098?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-1-129541098-blog-124682490.235^v43^pc_blog_bottom_relevance_base8&spm=1001.2101.3001.4242.2&utm_relevant_index=4

Free scrum board

1. Redmine
1.  Redmine Plugins & Themes 介紹：那些我成功安裝的外掛
2. Plugins Directory » Redmine Dashboard
3. 如何用 Redmine 做專案管理＆體驗心得
4. 
   
   
   
2. OpenProject
1. 
   
   
   
3. Asana
1. 
   
   
   
2. 2G only
4. Gitlab
1. 
   
   
   
5. JIRA
1. 10G only

libevent timer

https://www.cnblogs.com/osbreak/p/17823102.html

 #include <iostream>

#include <event2/event.h> #include <signal.h> using namespace std; void timer(int sockfd, short what, void* arg) { cout << "[timer2]" << endl; } int main(int argc, char* argv[]) { event_base* base = event_base_new(); // 持久事件 event *ev = event_new(base,-1,EV_PERSIST,timer,0); //超时优化性能优化，默认event 用二叉堆存储（完全二叉树） 插入删除O（logn） //优化到双向队列 插入删除O（1） static timeval tv_in = {3,0}; const timeval *t; t = event_base_init_common_timeout(base,&tv_in); event_add(ev3,t3); // 性能优化：插入性能 O(1) // 进入事件主循环 event_base_dispatch(base); event_base_free(base); return 0; }

valgrind compilation

 https://blog.csdn.net/HZHejo/article/details/124682490

Check libraries dependence

 

Ref: https://albert-oma.blogspot.com/

check libraries dependence:

$ arm-linux-gnueabihf-readelf -d ./gst-launch-1.0

Virtual memory related

 Linux内存管理之vmap与vmalloc 圖文並茂 , 針對vmap_area

mmap system call 後, 進kernel 的流程 gitmind 自畫

https://elixir.free-electrons.com/linux/v5.10.230/source/mm/util.c 方便追code, 含各版本

AArch64 Linux memory layout

用 LD_PRELOAD 替換動態連結的函式庫

用 LD_PRELOAD 替換動態連結的函式庫

https://jasonblog.github.io/note/fcamel/04.html

TFAT

Power Fail Safe FAT File System

https://elinux.org/images/5/54/Elc2011_munegowda.pdf 

TI-LFAT and TI-LExFAT :

https://www.researchgate.net/publication/271722839_Design_and_Implementation_of_Log_Structured_FAT_and_ExFAT_File_Systems

KFAT:

https://www.researchgate.net/publication/344581895_KFAT_LOG-BASED_TRANSACTIONAL_FAT_FILESYSTEM_FOR_EMBEDDED_MOBILE_SYSTEMS

TFS4:

1. https://elinux.org/images/5/54/Elc2011_munegowda.pdf
2. https://bitsavers.computerhistory.org/components/samsung/flash/TFS4_v1.5.0_Porting_Guide_20060502.pdf
3. 
   
   
   

ExFAT

1. https://events.static.linuxfound.org/images/stories/pdf/lceu11_munegowda_s.pdf

Renesas:. (not Transaction)

TFAT V.4.02 (FatFs R0.13c) for RX family allows to the format feature for SD memory card and USB memory in addition to eMMC and Serial Flash memory.

1.  https://www.renesas.com/en/document/apn/rx-family-open-source-fat-file-system-m3s-tfat-tiny-module-using-firmware-integration-technology?language=en&srsltid=AfmBOootRvzRHDCmHPSjqznUcYY8yXmaEfAfhSOP7xiem1jOCZ-Jukhm
2. https://www.renesas.com/en/software-tool/fat-file-system-m3s-tfat-tiny-rx-family#overview

github Permission denied (publickey)的简单解决方法

 https://blog.csdn.net/m0_65465945/article/details/134202945

1.执行 ssh-keygen -t rsa -C "你的git注册邮箱"，在 .ssh 目录下会生成以下3个文件：

                （1）id_rsa，    （2）id_rsa.pub，    （3）known_hosts

2.在浏览器登录github，在Settings界面点击左边的 SSH and GPG keys，然后复制  id_rsa.pub 文件的内容到SSH keys，点击Add SSH key即可。

3. 执行 ssh -T git@github.com，就能看到成功了。

[English Skills] 進階英文 - 天啊！符號們怎麼唸啊？(下)

https://chipersonalbranding.blogspot.com/2017/09/english-skills.html 

https://chipersonalbranding.blogspot.com/2018/04/english-skills.html

pthread, sem_wait, mutex, atmoic, concurrent-programs, sysprog21

 https://www.cnblogs.com/WindSun/p/11441234.html

https://hackmd.io/@sysprog/concurrency-atomics#wait-free-amp-lock-free

1. concurrent-programs
2. 
   

https://github.com/sysprog21/concurrent-programs/tree/master?tab=readme-ov-file

ring buffer

 熊喵君的博客

Jserv

指定時間的類型

 clock_getres 的第一個參數是指定時間的類型，常見的類型有：

https://blog.gtwang.org/programming/measure-the-execution-time-in-c-language/2/#google_vignette

• CLOCK_REALTIME：系統的實際時間（wall-clock time）。
• CLOCK_REALTIME_COARSE：系統的實際時間（wall-clock time），取得速度快，但精確度校低。
• CLOCK_MONOTONIC：單調遞增時間（monotonic time），這個時間會非常穩定的持續遞增，不會因為系統時間改變而有變動，適合用於測量程式執行效能。
• CLOCK_MONOTONIC_COARSE：與 CLOCK_MONOTONIC 類似，取得速度快，但精確度校低。
• CLOCK_MONOTONIC_RAW：與 CLOCK_MONOTONIC 類似，但是它是從硬體時鐘所讀取出來的值。
• CLOCK_PROCESS_CPUTIME_ID：程式行程的 CPU time，這個時間包含所有的執行序所花費的時間。
• CLOCK_THREAD_CPUTIME_ID：程式單一執行序所耗費的時間。

https://www.cnblogs.com/memo-store/p/5658277.html

 CLOCK_REALTIME，可以理解为wall time，即是实际的时间。用户可以使用命令（date）或是系统调用去修改。如果使用了NTP， 也会被NTP修改。当系统休眠（suspend）时，仍然会运行的（系统恢复时，kernel去作补偿）。

CLOCK_MONTONIC，是单调时间，即从某个时间点开始到现在过去的时间。用户不能修改这个时间，但是当系统进入休眠（suspend）时，CLOCK_MONOTONIC是不会增加的。

CLOCK_MONOTONIC_RAW，和CLOCK_MONOTONIC类似，但不同之处是MONOTONIC_RAW不会受到NTP的影响。CLOCK_MONOTONIC会受到NTP的影响并不是说NTP会去修改CLOCK_MONOTONIC，使其不连续，而是说当NTP server 和本地的时钟硬件之间有问题，NTP会影响到CLOCK_MONOTONIC的频率，但是MONOTONIC_RAW则不会受其影响。 其区别可以参考 Difference between MONOTONIC and MONOTONIC_RAW

CLOCK_BOOTTIME，与CLOCK_MONOTONIC类似，但是当suspend时，会依然增加。可以参考LWN的这篇文章 introduce CLOCK_BOOTTIME

Lens Calculator and Resolution Simulator

 

Lens Calculator and Resolution Simulator

Resolution...