• Friday 2:45pm, David Sankel "Better Code: Validity" AdobeCoping with Other People's Code Adobe 11my crafsman house Adobe 12my crafsman house Adobe 13my crafsman house old-growth cedar Adobe 15post-conference re-entry letdown Adobe 16post-conference re-entry Coping with Other People's Code Adobe 17post-conference re-entry coping is not rewriting 100% to your own tastes Adobe 18triage they also do things like speak up when they have a new solution, jump in and help fx someone else’s mess, and pass their learnings along to others" — Dr Cat Hicks, "Sense of Belonging and Sofware Teams"

12 C++20’s Calendars and Time Zones in MSVC Miya Natsuhara ("MEE-yuh Not-soo-HAR-uh") Miya.Natsuhara@microsoft.com Software Engineer, Visual C++ LibrariesWelcome to CppCon 2021! Join leap_seconds (https://youtu.be/WX3OmVu4lAs) • time_zone and time_zone_link (https://youtu.be/MODhhr7m-5s) • system_clock::now(), file_clock, leap second awareness (https://youtu.be/c7DT28TV0AY)9 Part II: Safety The “simple” calendrical types (e.g., day, month, year) are very straightforward – what’s the point in creating types for these concepts at all? Couldn’t we just use unsigned int for each

2024 Bloomberg Finance L.P. What’s Eating My RAM? CppCon 2024 September 17, 2024 Jianfei Pan Software Engineer, Portfolio/Risk AnalyticsA story 🚨 90% Memory Used: What’s that alarm? 🔍Back to basics: allocation troubleshooting & tools: Leak & Fragmentation🚨 90% Memory Used: What’s that alarm?🚨 90% Memory Used What’s that alarm? Consequences: ● Swap: performance degradation ● Out-of-memory (OOM) resources are shared by different processes🚨 90% Memory Used ~$ top -o RES What’s that alarm?🚨 90% Memory Used What’s that alarm? ~$ top -o RES🔍Back to basics: How does my code impact memory usage

VS Code @ CppCon 2024 What’s new for Visual Studio Code: Performance, GitHub Copilot, and CMake Enhancements (Provided by Conference)Meet the Speakers Sinem Akinci PM for C++ Copilot and CMake in in VS Code Alexandra Kemper PM for the C++ Extension for VS CodeAgenda: What's new in VS Code Faster Performance Smarter GitHub Copilot suggestions Easier to use Features for CMake & C/C++ Extensible Copilot solutions Wait I want to learn about Visual Studio! Check out the talk tomorrow @ 13:30 “What’s New in Visual Studio for C++ Developers” – Mryam Girmay & Michael PriceVS Code has a rich extension

xmm0, xmm1 orps xmm0, xmm2 movdqu XMMWORD PTR [r10+rax-16], xmm0 cmp ecx, edx jl SHORT $LL4@s32_1; After vmovdqu xmm1, XMMWORD PTR [r10+rax] vpsubd xmm1, xmm1, XMMWORD PTR [rax] vpabsd xmm2 edx, 4 vmovdqu XMMWORD PTR [rbx+rax], xmm2 lea rax, QWORD PTR [rax+16] cmp edx, ecx jl SHORT $LL4@s32_1 ; Before movdqu xmm0, XMMWORD PTR [r11+rax] add ecx, 4 movdqu xmm1, XMMWORD PTR [rax] lea xmm0, xmm1 orps xmm0, xmm2 movdqu XMMWORD PTR [r10+rax-16], xmm0 cmp ecx, edx jl SHORT $LL4@s32_1bool did_meow(); bool did_not_meow() { return !did_meow(); }; Before bl |?did_meow| uxtb

simplifying our code & tools56 part of the sea change → compile-time meta programming in C++ “The world’s big things only can be done by paying attention to their humble beginnings.” — Lao Tzu7 template (mostly-already-known) rules, “shift-left” to compile time27 from the Praise page “... This book’s emphasis on the security aspects of C programming is unmatched … use all of the available tools it seriousness about adoptability & improving safety of existing code30 auto f1() { char a[] = {'s', 'e', 'c', 'r', 'e', 't' }; } auto f2() { char a[6]; // or std::array print(a); // today

SSH/container/WSL remote experiences and much, much more… https://aka.ms/cpp/code Thu 09/19 – 16:15pm What’s New for Visual Studio Code Alexandra Kemper & Sinem Akinci10 Years of Microsoft @ CppCon Many thanks

© XXX Page 1 of 9 Curve支持S3 数据缓存方案© XXX Page 2 of 9 版本 时间 修改者 修改内容 1.0 2021/8/18 胡遥 初稿 背景 整体设计 元数据采用2层索引 对象名设计 读写缓存分离 缓存层级 对外接口 后台刷数据线程 本地磁盘缓存 关键数据结构 详细设计 Write流程 Read流程 ReleaseCache流程 Flush流程 FsSync流程 后台流程 poc测试验证 背景 基于s3的daemon版本基于基本的性能测试发现性能非常差。具体数据如下： 通过日志初步分析有2点原因© XXX Page 3 of 9 1.append接口目前采用先从s3 get，在内存中合并完后再put的方式，对s3操作过多 2.对于4k 小io每次都要和s3交互，导致性能非常差。 因此需要通过Cache模块解决以上2个问题。 可能的合并后flush到s3上，在读场景上，能够预读1个block大小，减少顺序读对于底层s3的访问频次。从这个思路上该缓存方案主要针对的场景是顺序写和顺序 读，而对于随机写和随机读来说也会有一定性能提升，但效果可能不会太好。 元数据采用2层索引 由于chunk大小是固定的（默认64M），所以Inode中采用mapS3ChunkInfoList> s3ChunkInfoMap

LLVM’s Real-time Safety Revolution Tools for Modern Mission Critical SystemsChris Apple ● 10-year veteran of the audio industry ● Previously Dolby, Roblox, Spatial Inc. ● Currently: layabout David Real-time programmingSometimes it’s obviousvoid dispatch() { mutex_.lock(); ... } 🚨void dispatch() { x = make_unique(); ... } 🚨Sometimes it’s hiddenvoid process_audio() { __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e3f) #3 0x5770e08ba394 in _start (/app/output.s+0x2c394) 0x606000000300 is located 0 bytes after 64-byte region [0x6060000002c0,0x606000000300) allocated

© XXX Page 1 of 11 curvefs对接s3方案设计（过程文档）© XXX Page 2 of 11 时间 修订人 修订内容 2021-05-20 胡遥 初稿 2021-07-20 胡遥 细化write和read流程 整体架构 整体思路 接口和关键数据结构 mds.proto client端数据结构 metaserver.proto space相关数据结构和proto init流程 write流程 read流程 整体架构 S3ClientAdaptor模块：负责将文件数据进行chunk，以及block的拆分为s3的object，并写入/读取s3的object。 S3-allocator模块：负责分配s3-object唯一标识。© XXX Page 3 of 11 整体思路 curvefs对接s3和对接volume主要的区别在于数据持久化和空间 h，以及空间分配申请（s3不需要释放空间，可 直接删除对应s3 object） 文件首先会按照chunk进行拆分，每个chunk固定64M/1G（待定），chunk内部会划分为多个block，每个block最大4M，每个block对应s3上一个object。 s3上对象已chunkid_indexblock_version进行命名，元数据则已S3ChunkInfo（