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.
Just enjoyed the experience without needing to think about why, and a look at twilightpetalmarket kept that effortless feeling going, sometimes the best content is invisible in the sense that you forget you are reading until you reach the end and realise time has passed without you noticing it pass naturally.
Felt the post had been quietly polished rather than aggressively styled, and a look at xenojet confirmed the same understated polish, sites whose quality reveals itself slowly rather than announcing itself loudly are the kind I trust more deeply because the trust is not based on first impressions of marketing but actual substance.
Worth saying this site reads better than most paid newsletters I have tried, and a stop at zingdart confirmed that comparison, the bar for free content is often lower than for paid but this site clears the paid bar consistently and that says something about the editorial approach behind the work being published here regularly.
Started imagining how I would explain the topic to someone else after reading, and a look at docktone gave me more material for that imagined explanation, content that improves my own ability to discuss a topic is content that has actually transferred knowledge rather than just decorating my screen for a few minutes.
A piece that did not try to be timeless and ended up reading as durable anyway, and a look at fluxbuild extended that durable feel, content that stays useful past its publication date without straining for permanence is content that ages well and this site has the kind of evergreen quality that I value highly today.
Bookmark earned, share earned, return visit earned, all from one reading session, and a look at zingdart did the same, the trifecta of bookmark and share and return is rare in a single visit and represents the highest level of engagement I tend to offer any piece of online content these days here.
how do you place a bet on the grand national
Have a look at my webpage: horse racing non runners today uk (Maggie)
Felt the post had been written without using a single buzzword, and a look at sleekgain continued that clean vocabulary, content free of jargon and trendy phrases reads better and ages better and this site has clearly committed to a vocabulary that will not feel dated in three years which is impressive editorially.
Этот информативный текст сочетает в себе темы здоровья и зависимости. Мы обсудим, как хронические заболевания могут усугубить зависимости и наоборот, как зависимость может влиять на общее состояние здоровья. Читатели получат представление о комплексном подходе к лечению как физического, так и психического состояния.
Ознакомьтесь поближе – Наркологическая клиника «Похмельная служба» в Нижнем Новгороде
wedden voor geld vandaag
Take a look at my page – basketball-wetten.Com
Started believing the writer knew the topic deeply by about the second paragraph, and a look at logicarc reinforced that confidence, the speed at which a writer establishes credibility through their writing is a useful quality signal and this writer establishes it quickly and quietly without resorting to credential dropping or self promotion.
Beats most of the alternatives on the topic by a noticeable margin, and a look at volttray did not change that at all, this is one of the better corners of the open internet for this kind of content and I am glad I clicked through rather than skipping past quickly like I usually do.
Just want to recognise that someone clearly cared about how this turned out, and a look at urbanfernmarket confirmed that care extends across the broader site, you can feel the difference between content shipped to hit a deadline and content released because the writer was actually proud of the result for once.
Felt the writer respected the topic without being precious about it, and a look at velvetshorecollective continued that respectful but unfussy treatment, finding the right register for serious topics is hard and this site has clearly figured out how to take the topic seriously while still being readable for casual visitors regularly.
Thanks for not padding this with the usual filler intros and outros that every other blog seems to require, and a quick visit to sleekhold continued that lean approach across more posts, content stripped of waste is content that respects you and I will always come back to that kind of approach.
Quietly impressive in a way that does not announce itself, and a stop at premiumcartcorner extended that quiet impressiveness, the kind of quality that emerges through sustained attention rather than first impressions is the kind I trust more deeply and this site has been earning that deeper trust across multiple sessions over time consistently.
Speaking from the perspective of having read widely on the topic this site offers something distinct, and a look at beamreach reinforced that distinctness, the rare site that contributes something genuinely original to a saturated topic is the rare site worth following carefully and this one has demonstrated that original contribution capability today.
Now thinking I want more sites built on this kind of editorial foundation, and a stop at fastgoodsarena extended that wish into a broader hope, sites built on substance and care rather than on metrics and growth are the kind of sites I want to see more of and this one is a small example worth supporting.