Changes between Version 54 and Version 55 of WikiStart


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Timestamp:
Dec 20, 2019, 5:10:30 PM (2 years ago)
Author:
alain
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  • WikiStart

    v54 v55  
    3838== D) [wiki:page_tables GPT & VSL implementation] ==
    3939
    40 To avoid contention when several threads access the same page table to handle TLB miss, ALMOS-MKH replicates the page tables. For each multi-threaded user application P, the Generic Page Table (GPT), and the Virtual Segments List (VSL) are replicated in each cluster K containing at least one thread of the application. According to the "on-demand paging" principle, these replicated structures GPT(K,P) and  VSL(K,P) are dynamically updated when page faults are detected. This section describes this building mechanism and the coherence protocol required by these multiple copies.
     40To avoid contention when several threads access the same page table to handle TLB miss, ALMOS-MKH replicates the process descriptors : For each multi-threaded process P, the Generic Page Table (GPT), and the Virtual Segments List (VSL) are replicated in each cluster K containing at least one thread of the application. According to the "on-demand paging" principle, these replicated structures GPT(K,P) and  VSL(K,P) are dynamically updated when page faults are detected. This section describes this building mechanism and the coherence protocol required by these multiple copies.
    4141
    4242== E) [wiki:thead_scheduling Trans-cluster lists of threads] ==