Engineering Group, Engineering Group > Software Engineering
General Summary:
Responsible for Linux system performance analysis and optimization on upstream kernel based products on Qualcomm platforms. You will identify performance bottlenecks, drive root-cause analysis, develop fixes/improvements, and prevent regressions through benchmarking and automation. Focus areas include CPU scheduling, memory management, I/O subsystem, boot performance, and low-level HW performance characteristics (PMU, cache, DDR).
1. Analyze and optimize Linux upstream kernel performance across scheduler, memory, I/O, and boot-up sequence.
2. Identify system-level performance bottlenecks using profiling/tracing tools/bootchart; propose and implement improvements in kernel and/or userspace.
3. Conduct root-cause analysis for performance issues and regressions; provide clear analysis reports and corrective actions.
4. Build and maintain performance benchmarking methodology: KPI definition, test plans, automation, baseline tracking, and regression gating.
5. Optimize boot time: analyze boot critical path (kernel init, userspace init, systemd, services), reduce latency, and validate improvements.
6. Drive performance-related patch development and upstream-quality engineering (review, test, documentation).
7. Collaborate with cross-functional teams (platform, camera, graphics, multimedia, power, QA) to diagnose and resolve performance issues.
Skills /Experience Required:
1. Strong experience in Linux system performance analysis and optimization (kernel and/or system level).
2. Solid understanding of Linux upstream kernel internals, especially:
3. Scheduler (CFS/RT, task wakeup, CPU affinity, load balancing, latency)
4. Memory management (page cache, reclaim, compaction, CMA/contiguous memory concepts, memory pressure)
5. I/O subsystem (block layer, filesystems basics, I/O scheduling, latency/throughput tradeoffs)
6. Boot performance fundamentals (init sequence, kernel/userspace interactions)
7. Good understanding of low-level performance topics: PMU/perf events, CPU cache behavior, memory bandwidth/DDR.
8. Proficient programming skills in C (kernel/userspace) and scripting in Python/Shell for automation.
9. Hands-on experience with performance tools such as perf, ftrace, trace-cmd, eBPF/bpftrace, flame graphs, and standard benchmarking tools.
10. Strong problem-solving skills, ability to communicate findings clearly, and ability to work effectively across teams.
Skills /Experiences are plus:
1. Camera performance background: understanding of camera pipeline, buffering/latency, throughput tuning.
2. Familiar with CPU DCVS driver and power management
3. Graphics/display stack knowledge on Linux: Wayland/Weston render pipeline; GPU performance analysis and tuning.
4. Experience with multimedia frameworks and performance tuning (e.g., V4L2, GStreamer) is a plus.
5. Familiarity with ARM SoC architecture and performance tuning on embedded/mobile platforms.
6. Experience contributing patches to upstream Linux or maintaining kernel trees.
Minimum Qualifications:
- Bachelor's degree in Engineering, Information Systems, Computer Science, or related field and 6+ years of Software Engineering or related work experience.
OR
Master's degree in Engineering, Information Systems, Computer Science, or related field and 5+ years of Software Engineering or related work experience.
OR
PhD in Engineering, Information Systems, Computer Science, or related field and 4+ years of Software Engineering or related work experience.
- 3+ years of work experience with Programming Language such as C, C++, Java, Python, etc.
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