快手性能优化专家
社招全职3-5年D7198地点:北京状态:招聘
任职要求
1、喜欢分析问题,有深厚的基础知识,包括但不限于CPU、GPU体系结构、操作系统,网络协议; 2、熟悉各类分析工具 vtune、perf、sar、ebpf、nsys等,能正确使用并解读相关数据; 3、熟练使用一门高级编程语言,比如 C/C++/JAVA/GO; 4、良好的沟通、团队协作能力、强烈的责任心、进取心、优秀的执行能力。
工作职责
1、通过深入了解CPU、GPU微体系结构,操作系统运行机制等方式,优化和提升机器算力; 2、深入分析应用程序性能瓶颈,优化程序吞吐; 3、平台、业务性能优化方案的研发、推广落地、收益评估; 5、建设性能分析工具、平台,提升性能分析效率。
包括英文材料
Perf+
https://perfwiki.github.io/main/
perf is powerful: it can instrument CPU performance counters, tracepoints, kprobes, and uprobes (dynamic tracing).
https://www.brendangregg.com/bpf-performance-tools-book.html
This book can help you get the most out of your systems and applications, helping you improve performance, reduce costs, and solve software issues.
[英文] perf Examples
https://www.brendangregg.com/perf.html
These are some examples of using the perf Linux profiler, which has also been called Performance Counters for Linux (PCL), Linux perf events (LPE), or perf_events.
https://www.youtube.com/watch?v=M6ldFtwWup0
eBPF+
https://ebpf.io/get-started/
eBPF is a revolutionary technology that can run sandboxed programs in the Linux kernel without changing kernel source code or loading a kernel module.
C+
https://www.freecodecamp.org/chinese/news/the-c-beginners-handbook/
本手册遵循二八定律。你将在 20% 的时间内学习 80% 的 C 编程语言。
https://www.youtube.com/watch?v=87SH2Cn0s9A
https://www.youtube.com/watch?v=KJgsSFOSQv0
This course will give you a full introduction into all of the core concepts in the C programming language.
https://www.youtube.com/watch?v=PaPN51Mm5qQ
In this complete C programming course, Dr. Charles Severance (aka Dr. Chuck) will help you understand computer architecture and low-level programming with the help of the classic C Programming language book written by Brian Kernighan and Dennis Ritchie.
C+++
https://www.learncpp.com/
LearnCpp.com is a free website devoted to teaching you how to program in modern C++.
https://www.youtube.com/watch?v=ZzaPdXTrSb8
Java+
https://www.youtube.com/watch?v=eIrMbAQSU34
Master Java – a must-have language for software development, Android apps, and more! ☕️ This beginner-friendly course takes you from basics to real coding skills.
Go+
https://www.youtube.com/watch?v=8uiZC0l4Ajw
学习Golang的完整教程!从开始到结束不到一个小时,包括如何在Go中构建API的完整演示。没有多余的内容,只有你需要知道的知识。
相关职位
社招5-8年研发类
1、承担 Android 系统级别与 kernel 的性能剖析工作,主导性能优化方案规划,涵盖整机性能提升、精简系统启动流程、缩短启动耗时、合理调配内存、优化 CPU 调度等关键板块; 2、依据不同应用场景需求,拆解出系统层面可量化的性能指标,并全程跟踪指标优化进展,及时调整优化策略; 3、代表系统软件优化团队,深度参与整机性能横向协作项目,包括前期设计研讨、实地调研,全力攻克优化过程中的重难点问题。
社招5年以上研发类
1、负责CPU/GPU/DDR/Cache等底层调度算法的具体优化设计以及实现; 2、负责性能与游戏系统调度相关专项优化工作,保障vivo手机性能与功耗的领先性; 3、负责性能与游戏底层调度相关疑难问题攻关。