Me talking this having OS exam tomorrow 😭

have a nice day ለማንኛውም 😁

was studying page replacement algorithms and had a thought ...

quick context first: your computer's RAM is limited. the OS creates an illusion that every program has way more memory than physically exists — it secretly stores some of it on disk. but when a program needs a page that's currently on disk, the OS has to bring it in ... and if RAM is full, it has to kick something out first

which page do you kick out? that's the page replacement problem

the classic algorithms (LRU, CLOCK ...) are hand-crafted heuristics. I bet many of u know abt LRU - it evicts the least recently used page basically ...

the theoretically perfect one — OPT — evicts whichever page won't be needed for the longest time. but it requires knowing the future lol

so I was thinking ... why not RL?

— state: recent page access history
— action: which page to evict on a fault
— reward: +1 hit, -1 fault

RL could learn to approximate OPT from patterns in the workload instead of needing oracle knowledge

turns out this is a real research area called learning-augmented algorithms — you take something like LRU and plug in an ML predictor on top. good predictor → approach OPT, bad predictor → fall back to LRU gracefully

OS exam tomorrow and my brain is doing research ideation 😭

And this was the ending 😭😭

ያው ኖሮም አልሰራ ግን it hurts 😁😭

Anyone በቅርብ የገዛ? Still is there the two year plan ende?

Yeah they are awesome ...

the amharic fern 🔥 ... they style + content ... ትንሽ ግን ሌላ ተራኪ ቢሆን ጸድ ነው

If you think you shouldn't make your bed because it will just get messy again, I have terrible news about literally every aspect of life.

Ontogeny Recapitulates Phylogeny
Each new class of computer (mainframe → mini → PC → smartphone → smart card) goes
through the same evolutionary stages as its predecessors. Assembly → high-level
languages. No OS → batch → multiprogramming → timesharing. No disk → single directory
→ hierarchical file system. Technologies become obsolete, then return as hardware
changes. Example: caches appeared when CPUs got faster than RAM. If RAM ever
became faster than CPU, caches would vanish. Study 'obsolete' ideas — they may return.

From Andrew Tanenbaum's OS Book

ውይ በዚህ ሰዓት OS ምናምን እያልኩ አልጨቅቃችሁ

"በሰላም እተኛለሁ፥ አንቀላፋለሁም፤ አቤቱ፥ አንተ ብቻህን በእምነት አሳድረኸኛልና።"

— መዝሙረ ዳዊት 4:8

"ለአንተ ፈጥረኸናልና ልባችን በአንተ እስካላረፈ ድረስ ዕረፍት የለውም። ጌታ ሆይ፥ አንተን የሚለምንህ ማን ነው? አንተን መጥራት ራሱ የእምነት ምልክት ነው፤ እምነትንም የሰጠኸን አንተ ነህ። ነፍሴ ሆይ፥ አሁን እረፊ፤ የፈጠረሽ አልረሳሽምና። ከዋክብትን በእጁ የያዘ እሱ ዛሬ ሌሊትሽንም በእጁ ይዟል።"

— St. Augustine - Confessions

"አንድ ወንድም አባ ፖይመንን እንዲህ ሲል ጠየቃቸው፦ 'ከመተኛቴ በፊት ምን ላድርግ?' ሽማግሌውም፦ 'በውስጥህ ስላለው እስትንፋስ እግዚአብሔርን አመስግን፤ ያ ብቻ በቂ ነው' አሉት።"

— ከበረሃ አባቶች (Desert Fathers)

can u see me being sued? 😂

መዝሙረ ዳዊት 5:3

በማ​ለዳ ቃሌን ስማኝ፥ በማ​ለዳ በፊ​ትህ እቆ​ማ​ለሁ፥ እጠብቃለሁም።

ቅዱስ ዮሐንስ አፈወርቅ

"ከእንቅልፍህ ስትነቃ መጀመሪያ የምታደርገው ነገር ቢኖር አፍህ ለእግዚአብሔር ምስጋናን እንዲያቀርብ መፍቀድ ይሁን። ነፍስህ በአምላኳ ስም መባረክ ስትጀምር ሰይጣን ይሸሻል፤ መላእክትም ወደ አንተ ይቀርባሉ።"

መልካም ውሎ

ልደትሽ ልደታችን ነው💛
እንኳን አደረሳቹ መልካም በዓል

@byte_philosopher