Trabalho 1 – EPOS
Idle-waiting Thread Joining
– Este trabalho tinha como objetivo alterar o modo que era feito o “join” em uma Thread. Sendo que o mesmo inicialmente era feito da seguinte maneira:
[code lang=”c”] while(_state != FINISHING)
yield();
[/code]
O mesmo consiste basicamente, em verificar o estado da thread que se esta dando join e caso o estado nao seja FINISHING dar a vez a outro processo. Esta solucao, acarreta no consumo excessivo de recursos ja que o mesmo sempre retorna para a fila de _ready. E eh executado novamente quando o escalonador escolher esta thread. O trabalho pede que seja modificado de modo que o consumo de recursos nao seja excessivo.
Arquivos Modificados:
– thread.cc
– Thread.h
Solucao:
Foi criada uma variável adicional em threads.h, _waiting_for_me, que é um ponteiro para uma thread. Quando o método “join” é chamado, a thread que está executando é colocada no _waiting_for_me da thread chamada e é suspensa. Se a thread já finalizou ou alguém já chamou “join” nela, nada é feito. No método “exit”, caso _waiting_for_me esteja preenchida, é chamado o método “resume” na thread referenciada.
Pensamos em colocar uma lista de referências para várias threads poderem dar “join” na mesma thread, porém vimos na documentação do POSIX que isso era considerado um erro lógico, e achamos que acarretaria um consumo de recursos adicional desnecessário, pois não seria possível usar o _link já existente na thread, já que ela teria de estar tanto na lista de suspensos quanto na lista _waiting_for_me da outra thread.
Explicacao mais detalhada da implementacao escolhida e outras solucoes pensadas.
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Этот краткий обзор предлагает сжатую информацию из области медицины, включая ключевые факты и последние новости. Мы стремимся сделать информацию доступной и понятной для широкой аудитории, что позволит читателям оставаться в курсе актуальных событий в здравоохранении.
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Эта публикация раскрывает психологические механизмы зависимости и их роль в развитии расстройств. Читатель узнает о том, как психология влияет на формирование зависимостей и как профессиональная помощь может изменить ситуацию.
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Reading this in three sittings because the day was fragmented, and the piece survived the fragmentation, and a stop at rankdrift held up under similar reading conditions, content engineered for continuous attention is fragile in modern conditions and this site reads as durable across the realistic ways people consume content today.
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Closed the tab feeling I had spent the time well, and a stop at learnsomethingamazing extended that feeling across more pages, the test of whether time on a site was well spent is one I apply silently after closing tabs and very few sites pass it but this one passed it cleanly today afternoon clearly.
В этой статье рассматриваются способы преодоления зависимости и успешные истории людей, которые справились с этой проблемой. Мы обсудим важность поддержки со стороны близких и профессионалов, а также стратегии, которые могут помочь в процессе выздоровления. Научитесь первоочередным шагам к новой жизни.
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Now adding the homepage to my regular check rotation rather than waiting for individual links to find me, and a stop at rankdrift confirmed the rotation upgrade, the move from passive discovery to active checking is a vote of confidence in a sites ongoing quality and this site has earned that active engagement clearly.
A piece that suggested careful editing without showing the marks of the editing, and a look at linktower continued that invisible polish, the best editing disappears into the prose and this site reads as having been edited with skill that does not announce itself which is the highest compliment I can offer any blog content.
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Этот документ охватывает важные аспекты медицинской науки, сосредотачиваясь на ключевых вопросах, касающихся здоровья населения. Мы рассматриваем свежие исследования, клинические рекомендации и лучшие практики, которые помогут улучшить качество лечения и профилактики заболеваний. Читатели получат возможность углубиться в различные медицинские дисциплины.
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This filled in a gap in my understanding that I had not even noticed was there, and a stop at leadsurge did the same, the kind of post that gives you more than you expected when you first clicked through from somewhere else, a real find for anyone curious about the area covered here.
If I am being honest this is the kind of site I quietly hope my own work will someday resemble, and a stop at ranktower extended that aspirational feeling, finding work that models what I want to produce is part of why I read carefully and this site has been performing that modelling function for me lately consistently.
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Reading carefully here has reminded me what reading carefully feels like, and a look at leadpush extended that reminder, the experience of careful reading versus skimming is different in ways I had partially forgotten and this site has clearly refreshed my memory of what attention feels like when content rewards it consistently.
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Reading this triggered a small but real correction in something I had assumed, and a stop at linksignal extended that corrective effect, content that updates my beliefs through evidence rather than rhetoric is content with intellectual integrity and this site has earned that label consistently across the pieces I have read so far today.
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