Embedded Performance Engineering
Concurrency 기초 — Concurrency vs Parallelism·Race·Memory Model
Concurrency vs Parallelism (Rob Pike). Race condition. Memory model 도입.
· 4분 읽기
concurrency parallel
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Embedded Performance Engineering
CXL Interconnect 분석 — AI 시대 메모리 대역폭 확장
CXL 2.0/3.1과 Neoverse V2가 만든 cache-coherent interconnect. CXL.io·CXL.cache·CXL.mem 세 프로토콜, Type 1/2/3 디바이스, latency·대역폭의 현실.
· 10분 읽기
cxl interconnect
Embedded Performance Engineering
Thermal Throttling 분석 — Junction Temp·Trip Point·냉각
Junction temperature, thermal sensor, trip point, throttling 동작, 자동차·우주 환경.
· 4분 읽기
thermal throttle
Embedded Performance Engineering
Power vs Performance 트레이드오프 — DVFS·Race-to-Idle·Big.LITTLE
DVFS governor, race-to-idle, big.LITTLE, CPU 코어 hotplug, 측정·tuning.
· 6분 읽기
power dvfs
Embedded Performance Engineering
Peripheral Clock 분석 — PLL·Divider·Gating·DVFS
PLL/divider/gating으로 peripheral clock. STM32 RCC, Linux CCF. Power vs Performance.
· 4분 읽기
clock peripheral
Embedded Performance Engineering
MMIO 접근 성능 — Cache Policy·Write-Combining·Volatile·Barrier
MMIO uncached strongly-ordered. Write-combining for PCIe BAR. Volatile, DMB·DSB·ISB.
· 4분 읽기
mmio register
Embedded Performance Engineering
Interrupt Storm 처리 — NAPI·Rate-Limit·Polling 전환
IRQ flooding으로 main loop 봉쇄. NAPI 패턴, rate limit, interrupt coalescing.
· 4분 읽기
interrupt storm
Embedded Performance Engineering
Interrupt Latency 분석 — 진입·종료·Tail-Chaining·Late Arrival
Cortex-M 12-cycle latency. Tail-chaining 6-cycle. Late arrival, lazy stacking, FreeRTOS hooks.
· 4분 읽기
interrupt latency
Embedded Performance Engineering
DMA vs CPU Copy 성능 비교 — Break-even·Setup Overhead 실측
DMA setup overhead. CPU memcpy 최적화. Break-even size. 실측 데이터.
· 6분 읽기
dma memcpy
Embedded Performance Engineering
DMA 성능 최적화 — Burst·Scatter-Gather·Chain·Cache 일관성
Burst size 최적화. Scatter-gather, chain. Cache clean/invalidate, double buffer.
· 5분 읽기
dma burst