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1161. Linux Threads Home Page: Are Linux threads the same as other implementation?
Are Linux threads the same as other implementations? ... As stated above, most multithreaded OSs define a thread separately from processes. Linus Torvalds has defined that a thread is a "context of execution" (COE). This means that only one process/thread table and one scheduler is needed. Also the scheduler has been optomized so that the switching time for threads vs. tasks varies little--about 1.7us (threads) and 1.8us (fork) on a 75MHz Pentium. ... Clone Flag Values . define . ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/Comparison.html -- 4.6 Кб -- 21.01.1997
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1162. Linux Threads Home Page: What are threads (user/kernel)?
What are threads (user/kernel)? ... There are two types of threads: user-space and kernel-space . ... User threads typically can switch faster than kernel threads [however, Linux kernel threads' switching is actually pretty close in performance]. ... Some implementations support both user- and kernel-space threads. ... However, since Linux's kernel-space threads nearly perform as well as user-space, the only advantage of using user-threads would be the cooperative multitasking. Previous Page] . ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/Types.html -- 5.7 Кб -- 11.10.1996
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1163. Linux Threads Home Page: Does Linux support threads?
. Does Linux support threads? . Yes. As of 1.3.56, Linux has supported kernel-space multithreading. There also have been user-space thread libraries around as early as 1.0.9. There is on-going effort to refine and make the kernel more reentrant. With the introduction of 2.1.x, the memory space is being revised so that the kernel can access the user memory more quickly. [Previous Page] . [First Page] . [Dictionary] . [Email Author] . [Next Page]
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/Support.html -- 2.5 Кб -- 11.10.1996
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1164. Linux Threads Home Page: Is there a system call I can use to access kernel
. Is there a system call I can use to access kernel threads? . Recent versions of glibc has clone() defined thus: . int clone(int (*fn)(), void **stack, int flags, int argc,... /* args */); . fn . The thread routine . stack . The thread's stack . flags . Flags as defined above . argc . number of remaining parameters . /* args */ . the parameters expected by the thread. [Previous Page] . [First Page] . [Dictionary] . [Email Author] . [Next Page]
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/SystemCall.html -- 2.9 Кб -- 11.10.1996
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1165. Linux Threads Home Page: Are there ways currently to determine thread schedule
. Are there ways currently to determine thread schedule ordering? . Not 100%. There are realtime extensions in the 2.0.0 kernels that will grant finer-tuned control over threads/tasks via `sched_setscheduler'. [Author's note: I have no idea about this. I will update this as I get more info.] . [Previous Page] . [First Page] . [Dictionary] . [Email Author] . [Next Page]
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/Scheduling.html -- 2.5 Кб -- 11.10.1996
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1166. Linux Threads Home Page: What kinds of things should be threaded or...
What kinds of things should be threaded or multitasked? If you are a programmer and would like to take advantage of multithreading, the natural question is what parts of the program should/ should not be threaded. ... Will there be few locks on data (the amount of shared data is identifiable and "small")? ... Could the task be broken into various "responsibilities"? E.g. Could one thread handle the signals, another handle GUI stuff, etc.? Previous Page] . First Page] . ... Next Page] ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/ProgHeuristics.html -- 3.3 Кб -- 11.10.1996
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1167. Linux Threads Home Page: Is there sample code I can use to test out
. Is there sample code I can use to test out kernel-space threads? . By popular demand: Linus's clone example [clone.c] . [Previous Page] . [First Page] . [Dictionary] . [Email Author] . [Next Page]
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/LinusCode.html -- 2.3 Кб -- 11.10.1996
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1168. Linux Threads Home Page: Where can I learn more about threads?
Where can I learn more about threads? Here is a list of URLs, newgroups, etc. where you can learn more about thread programming. ... Sun: Workshop Developer Products--Threads [http://www.sun.com/sunsoft/Products/Developer-products/sig/threads/index.html] . ... Linux Threads [http://pauillac.inria.fr/~xleroy/linuxthreads/] . ... To subscribe email "subscribe linux-threads" (in the body with no subject) to MageNet [Majordomo@MageNet.com] . The list address is <linux-threads@magenet.com>. ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/LearnMore.html -- 5.0 Кб -- 11.10.1996
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1169. Linux Threads Home Page: How does one debug threads?
How does one debug threads? Modula-3 . Modula-3 supports user-space thread breakpoints. ... C/C++ (and anything compatible with gdb) . Gdb supports children processes and threads equally (since they are based on the task paradigm) if they do not share PIDs. Those threads which share PIDs can be accessed using the good-old-fashioned printf debugging (for now). Can someone guide me on accessing specific processes within gdb?) Previous Page] . First Page] . ... Next Page] ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/Debugging.html -- 2.7 Кб -- 11.10.1996
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1170. Linux Threads Home Page: What do the individual flags mean and do in clone()?
What do the individual flags mean and do in clone()? The clone() system call has several flags that will indicate how much will be shared between threads. Below you will find a table listing each flag, its function & its implementation status. Flag . ... CLONE_VM . Done . Share data and stack . ... Share filesystem info . CLONE_FILES . ... Share open files . CLONE_SIGHAND . ... Share signals . CLONE_PID . Almost Done . ... Previous Page] . First Page] . ...
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Ссылки http://rtm-cs.sinp.msu.ru/manual/faq/CloneFlags.html -- 3.1 Кб -- 11.10.1996
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