Re: lug-bg: Otnosno lekciqta za http serverite

[vd@xxxxxxxxx (Vladimir Dzhuvinov)]

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Zdravei,

Kato gledam, kirilicata e obyrkana, taka che ti otgovarqm po pamet i
angliiskite dumi, koito lichat tuk tam ;-)

On Thu, 17 May 2001, Stanislav Lechev wrote:

>> 	* ??????????? ?? kernel space threads (e.g. native Pthreads)
>> 	  ????? ??-?????, ????????? process fork
>
>da no nemovesh da polzwash kernel space w web servera si
>kojto e user space oswen ako ne polzwash tozi w kernela
>kojto wse oshte e experemental
Tuk nqmah predvid Linux, a Unix-ite, koito poddyrjat POSIX threads 
natively.

>> 	* ?????????????? ????? threads ?? ???? ?????? ????? ??-?????
>> 	  ?? ???? ????? ??????? ???????, ?????? VM, I/O ? ? ??????????
>> 	  ?? ??????????? signal ??????? ?? ??????? ??????
>>
>
>kakwo iskash da kavesh s prewklyuchwane (poqsni pls)
>no za towa ne sporq
Primerno, vseki proces ima otvoreni fajlove. Ako procesyt e multithreaded,
tezi file descriptors se spodelqt. Sledovatelno, ako prevkluchvash mejdu
dva threads, nqma nujda da prezarejdash file des. struct.

>taka ili inache rabotata s threads e po fastest ot fork :)
>ideqta mi beshe druga

>> ???? ????, ????????????? ????? threads ? ????? ??-?????, ????????? ?????
>> ???????? ??????? ?? IPC (pipes/ shared mem). ?? ???? http ?????? ????
>> ????? ???? ?? ? ?? ?????? ????????, ?????? ?????????, ????? ?????????
>> ??????? ?? ?? ??????? ?? ??????? ??????????? ??????? ??.
>>
>praw si ...
>no kolko po byrza
>move bi w otnhoshenie 80/100 za threads ...
>e i ? 
>nqkoj shte useti li razlikata ?
Predpolagam, che po gore sym pisal za IPC. Tuk pisah za memory(data)
sharing mewdu otdelnite threads. Primerno za takiva visualisation
aplikacii, kydeto edin thread pravi izchisleniqta, a drug chertae
obrazite. Ako iskash da pravish tova s dva razlichni procesa,
IPC ste e dosta po-bavno, a programiraneto systo nelesna rabota!

>> >spored mene
>> >kogato polzwame threads ... to togawa imame samo edin proces
>> >kojto w edin moment stawa mnogo tevak
>>
>> 100 threads ?????? ??-????? ????? ?? ??????? 100 ???????, ??????
>> ?????????? ???????? ?? ?? ??????.
>>
>da no ideqta e kakwo shte stane kogato ... pametta swyrshi ?
>wetno ako rabotim s threads move i da obsluvim 5 clients poweche
>no towa ne e ot znachenie ako w sledwashiq moment
>nemovem da obsluvim nito edin poradi towa che kernela ni e precakal
Az lichno ne bih pusnal samo edin multithreaded server, ami nqkolko ;-)
Ima i nachini da sledish pametta i response v programata, taka che da
spirash puskaneto na novi threads predi da si stignal kritichnata tochka.
Sestam se za edin nachin kak tova moje da byde kodirano, makar i da ne e
mnogo elegantno. Zatova ste si zamylcha ;-)

>ami az sym wivdal...
>no ne mozillata a celiq X
>i btw towa stana kogato tyrsek edno crack-che za edin kolega
>i se nabutah w obichainite xxx stranici kakto se ochakwashe
>sled koeto mi se otworiha sywsem nebrevno oshte 6-7 kopiq na NS-a
>i sled kato uspqh s prutytrqne na mishkata da zatworq 3 ot tqh
>se otworiha oshte 3 pyti po 3 i poznajte kakwo se sluchi
To zatova ot Netscape sa go krystili Mozilla ;-)

>btw towa e na mashina s 256 ram / 533 mhz
Mozilla is after your RAM ;-)

>kakto sam kaza ... sploluchliwa !!!
>az problemi s xmms-a nqmam
>oswen che na 256ram mi se tytri pri puskaneto i spiraneto
>t.e. pri syzdawaneto na threads i killwaneto im .....
Problemyt e, che trudno se pravi sravnenie. Tytri se, no v sravnenie s
kakvo? I dali tytreneto e tochno v thread creation/termination ili nqkyde
drugade? MPEG dekoderite naprimer trqbva da narpravqt mnogo memory
allocation za frame buffer. Ami ako v syseden prozorec si pusnal Mozilla,
i tq e izlapala sumati RAM?

Pozdravi,

Vladimir Dzhuvinov

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