Embedded Performance Engineering
Linux perf 기초 — stat·record·report 활용
Linux perf 표준 도구의 세 가지 핵심 명령. 설치, 권한, 그리고 첫 측정부터 핫스팟 분석까지.
· 5분 읽기
perf profiling
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Tech articles, book reviews, and presentations.
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Embedded Performance Engineering
SMP 성능 분석 — Per-Core·Affinity·Load Balance·Scalability
Per-core utilization과 CPU affinity, NUMA, migration cost, Amdahl 한계.
· 7분 읽기
smp affinity
Embedded Performance Engineering
Cache Coherency 프로토콜 — MESI·MOESI·Snoop·Directory
MESI와 MOESI 프로토콜, snoop과 directory 방식, coherency overhead 측정.
· 8분 읽기
coherency mesi
Embedded Performance Engineering
Memory Ordering 분석 — Acquire·Release·Seq-Cst·ARM Relaxed Model
C11/C++11 memory_order와 acquire-release pair, seq-cst 비용, ARM ldar/stlr.
· 7분 읽기
memory-ordering acquire
Embedded Performance Engineering
Lock-Free 자료구조 성능 — CAS·ABA·Hazard Pointer·Epoch Reclamation
CAS 기반 lock-free와 ABA 문제, hazard pointer와 epoch reclamation 비교.
· 6분 읽기
lock-free cas
Embedded Performance Engineering
Reader-Writer Lock 성능 — Reader/Writer Priority·RCU·Seqlock
RW-lock의 종류와 reader/writer priority, RCU 비교, seqlock의 read-mostly 대안.
· 6분 읽기
rwlock reader
Embedded Performance Engineering
Mutex 성능 분석 — Futex·Adaptive·Priority Inheritance
Mutex blocking 비용과 Linux futex 2-stage, adaptive mutex, priority inheritance overhead.
· 7분 읽기
mutex blocking
Embedded Performance Engineering
Spinlock 성능 분석 — Spin-Wait vs Context Switch·Ticket·MCS
Spinlock 비용 분석과 ticket lock, MCS lock의 scalability 차이.
· 5분 읽기
spinlock smp
Embedded Performance Engineering
Lock Contention 분석 — Wait·Hold·Convoy·측정 기법
Wait time과 hold time, contention ratio를 측정하고 lock convoy를 회피하는 법.
· 7분 읽기
lock contention
Embedded Performance Engineering
False Sharing 진단 — Cache Line Ping-Pong·Padding·측정
False sharing 원인. Cache coherence ping-pong. Padding으로 line 분리. 측정 방법.
· 4분 읽기
false-sharing cacheline