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.
На данном этапе специалист уточняет, как долго продолжается запой, какой вид алкоголя употребляется и имеются ли сопутствующие заболевания. Тщательный анализ информации позволяет оперативно определить степень интоксикации и выбрать оптимальные методы терапии для быстрого и безопасного вывода из запоя.
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Got something practical out of this that I can apply later this week, and a stop at betterbasket added more details to think about, this is exactly the kind of content I bookmark for future reference rather than the throwaway listicles that dominate most search results these days for almost any common topic.
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Bookmark added without hesitation after finishing, and a look at shadylaneshoppe confirmed I should bookmark the homepage too rather than just this page, the rare site that earns category level trust rather than just single article approval is the kind I want to rely on across many different topics over time.
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Эта доказательная статья представляет собой глубокое погружение в успехи и вызовы лечения зависимостей. Мы обращаемся к научным исследованиям и опыту специалистов, чтобы предоставить читателям надежные данные об эффективности различных методик. Изучите, что работает лучше всего, и получите информацию от экспертов.
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Took me back a step or two on an assumption I had been making, and a stop at goldenfieldstore pushed that reconsideration further, writing that gently corrects the reader without being aggressive about it is a rare diplomatic skill and the team here clearly knows how to land critical points without turning readers off.
A clean read with no irritations, and a look at urbantrendstore continued that frictionless quality, the absence of small irritations is something I notice only when present elsewhere and this site is one of the rare places where everything just works and lets me focus on the substance rather than fighting the format.
Beyond the immediate post itself the editorial sensibility behind the site is what struck me, and a stop at trendystylezone continued displaying that sensibility, content that reveals editorial choices through accumulated reading is content with structural quality and this site has clearly developed an underlying approach worth identifying through multiple sessions of reading.
Pleasant surprise, the post delivered more than the headline promised, and a stop at buildyourvision continued that pattern of under promising and over delivering, the rarest combination on the modern web where most content does the opposite by promising the world and delivering thin recycled summaries instead each time you click on something interesting.
В этой статье рассматриваются различные аспекты избавления от зависимости, включая физические и психологические методы. Мы обсудим поддержку, мотивацию и стратегии, которые помогут в процессе выздоровления. Читатели узнают, как преодолеть трудности и двигаться к новой жизни без зависимости.
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