Top Tweets for #ComputerArchitecture
Want to understand how CPUs, GPUs, accelerators & memory systems really perform? Learn performance modeling from theory to implementation with hands-on guidance using leading open-source simulation tools. #ComputerArchitecture #PerformanceEngineering
π https://t.co/lirqwyhHkT
How your CPU notices a key press
Episode 17 of From One Switch to a CPU. Full episode: https://t.co/ARTAA6aWrx
#ComputerScience #ComputerArchitecture
How a hard disk reads data
Episode 16 of From One Switch to a CPU. Full episode: https://t.co/x4zS4UMBYd
#ComputerScience #ComputerArchitecture
Why two programs can use the same address
Episode 15 of From One Switch to a CPU. Full episode: https://t.co/5IueRE8YZw
#ComputerScience #ComputerArchitecture
What a CPU cache does
Episode 14 of From One Switch to a CPU. Full episode: https://t.co/9Z7N3XJakO
#ComputerScience #ComputerArchitecture
Want to understand how CPUs, GPUs, accelerators & memory systems really perform? Learn performance modeling from theory to implementation with hands-on guidance using leading open-source simulation tools. #ComputerArchitecture #PerformanceEngineering
π https://t.co/lirqwyhHkT
How CPUs guess the future
Episode 13 of From One Switch to a CPU. Full episode: https://t.co/61TE3kf5Zh
#ComputerScience #ComputerArchitecture
What a CPU pipeline is
Episode 12 of From One Switch to a CPU. Full episode: https://t.co/ZXSI2SWJ7n
#ComputerScience #ComputerArchitecture
What a CPU's control unit does
Episode 11 of From One Switch to a CPU. Full episode: https://t.co/Hwx5h7YIQm
#ComputerScience #ComputerArchitecture
Fetch, decode, execute
Episode 10 of From One Switch to a CPU. Full episode: https://t.co/XPFXZAkvn0
#ComputerScience #ComputerArchitecture
Want to understand how CPUs, GPUs, accelerators & memory systems really perform? Learn performance modeling from theory to implementation with hands-on guidance using leading open-source simulation tools. #ComputerArchitecture #PerformanceEngineering
π https://t.co/lirqwyhHkT
What if memory latency were measured in human time?
β€οΈ Register: 1 heartbeat
β DRAM: 6 min
π Fast SSD: 11 hrs
ποΈ NVMe: 3.5 days
π
HDD: 1 year
π Network round trip: 15 years
ποΈ Tape: 3,800 years
The lesson? Data locality is performance.
#ComputerArchitecture #Performance
Congratulations to Dr. Babak Falsafi, recipient of the 2026 IEEE Computer Society B. Ramakrishna Rau Award for contributions to architecting scalable systems! πThe award will be presented at #MICRO59 π #IEEE #ComputerArchitecture #TechAwards
Last time my L3 plateau only showed up right after a reboot. Part 2: traced it to buddy allocator fragmentation and how HugeTLB frees huge pages. Check out the blog!
https://t.co/ZbyvkIzfbj
#systems #performance #linux #x86 #computerarchitecture
Back to the grind! π First Computer Architecture class of the semester is in the books.
Just the syllabus and intros today, but I'm ready to dive into the hardware side of things. Letβs get it! π»π
#ComputerArchitecture #CSStudent #TechTwitter
Consider:
A = B + C
X = Y Γ Z
P = Q - R
These operations are independent.
A modern CPU can send them to different units at the same time:
ADD β Addition Unit
MUL β Multiply Unit
SUB β Integer Unit
Multiple operations progress in parallel.
#ComputerArchitecture #CPU #Semiconductor
Consider this:
R1 = A + B
...
R1 = X + Y
Both instructions use R1.
But the second instruction doesnβt actually need the first one.
They simply share the same register name.
#Pipeline #ComputerArchitecture #Semiconductor
Predict Branch
β
βΌ
Execute Speculatively
β β
Correct Wrong
β β
Keep Work Discard Work
Correct guesses save time.
Wrong guesses waste work.
#ComputerArchitecture #CPU #Engineering
Imagine this code:
if (x > 0)
A();
else
B();
The CPU predicts which path will run and immediately starts executing it.
No waiting.
#Programming #CPU #ComputerArchitecture
Branch
β
βββ΄ββ
β β
Guess β
β
Keep Running
Guess β
β
Flush Pipeline
Restart
Good predictions keep the CPU busy.
Bad predictions waste work.
#ComputerArchitecture #CPU #Pipeline
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