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Thread: Lavel 3- L3

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  1. #1
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    Default Lavel 3- L3

    انهارده انا قلت اشارك معاكو بموضوع حلو ونستفيد منه كلنا
    وهوه بيتكلم على المستوى الثالث فى المعالجه فى البروسيسور
    وطبعا نتكلم انجليزى احسن علشان نعرف نفهم

    Level 3 or L3 cache is specialized memory that works hand-in-hand with L1 and L2 cache to improve computer performance. L1, L2 and L3 cache are computer processing unit caches, verses other types of caches in the system such as hard disk cache. CPU cache caters to the needs of the microprocessor by anticipating data requests so that processing instructions are provided without delay. CPU cache is faster than random access memory, and is designed to prevent bottlenecks in performance.




    Let's explain it in details



    When a request is made of the system the CPU requires instructions for executing that request. The CPU works many times faster than system RAM, so to cut down on delays, L1 cache has bits of data at the ready that it anticipates will be needed. L1 cache is very small, which allows it to be very fast. If the instructions aren’t present in L1 cache, the CPU checks L2, a slightly larger pool of cache, with a little longer latency. With each cachemiss it looks to the next level of cache. L3 cache can be far larger than L1 and L2, and even though it’s also slower, it’s still a lot faster than fetching from RAM.
    Assuming the needed instructions are found in L3 cache -cache hit- bits of data might be evicted from L1 cache to hold the new instructions in case they’re needed again. L3 cache can then remove that line of instructions since it now resides in another cache or it might hang on to a copy depending on the design of the CPU – AMD & Intel-
    Also for more knowledge AMD have this technology – L3 – from approximately 2 years ago


    Also be note that
    L1 64-KB
    L2 256-KB
    L3 8 MB



    إذا كان عندك ملل من الدنيا وضيق في النفس وقلق وتفكير زائدين وخوف من المستقبل وعدم راحة في العيش ،، قل لا إله إلا الله محمد رسول الله ...
    فلديك نقص في الدين وستجده إن شاء الله بالصلاة والاستغفار وطاعة أوامر الله سبحانه وتعالى .

    Best Regards,
    MOHAMMED ELJOKER
    Security Engineer

    من مواضيع eljoker70000 :



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  6. #2
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    Thanks Mohamed, I'll move the thread to the suitable forum.
    Also the new technology for more new performance developing is cancel the north bridge and make a new technology named quickpath interconnect.
    This new technology is very fast than before.


    QPI , QuickPath Interconnect
    Replacing the role of FSB
    Intel uses the QPI to connect internal components of Core™ i7 processors , and to connect the CPU itself to the Northbridge and banks of memory.

    QPI delivers:
    Up to 25.6GB/sec of bandwidth between Core™ i7 processors and the rest of the system,providing exactly double the bandwidth of 1600 Hz FSB

  7. #3
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    great also there is some info about Intel QuickPath Technology

    QuickPath Technology unleashes the performance of the new processor microarchitecture. It replaces the shared front-side bus and memory controller hub found in previous-generation architectures with high-speed, point-to-point interconnects directly linked to the processors and I/O chipset. Each Intel QuickPath Interconnect (QPI) consists of two uni-directional links that operate simultaneously in each direction. Unlike a typical serial bus, each QPI transmits data packets in parallel across multiple lanes. Initially, each QPI has a total bandwidth up to 25.6 GB/s.

    25.6 GB/S we lesa we lesa
    إذا كان عندك ملل من الدنيا وضيق في النفس وقلق وتفكير زائدين وخوف من المستقبل وعدم راحة في العيش ،، قل لا إله إلا الله محمد رسول الله ...
    فلديك نقص في الدين وستجده إن شاء الله بالصلاة والاستغفار وطاعة أوامر الله سبحانه وتعالى .

    Best Regards,
    MOHAMMED ELJOKER
    Security Engineer

    من مواضيع eljoker70000 :


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