system idle process

concurrently, and threads in different processes can execute concurrently.4) Share process Resources : basically do not own resources, use the resources of the owning process. 3 Status of thread running 1) Execution status : The thread is executing on the CPU.2) ready State : Have all the resources needed to wait for the CPU to be idle.3) blocking state : Some r

between the three States is as follows:It should be noted that when a blocking process waits for an event, it cannot be run directly, but it must be ready. If the CPU is idle at this time, you can directly run the process; otherwise, you must wait for the scheduling of the scheduler.The operating system maintenance fo

language, before which the kernel code is written in sinks, completing some of the most basic initialization and environment setup work. No matter what part of the analysis kernel involves start_kernel, because almost all modules are called when they are initialized Init_task is a global variable, which is a manually created PCB. Process No. 0, which is the final idle

machines. # My Linux FTP memory is a little small # FreeIdle physical memory size BuffThe Linux/Unix system is used to store the contents and permissions in the directory. My local machine occupies about 189 MB. CacheCache is used directly to remember the files we opened and buffer the files. My local machine occupies more than 3400 MB (here is the cleverness of Linux/Unix, cache part of the idle physical

rotation operation.(3) The scheduler dispatches the processes in the second queue only when the first queue is idle, and the processes in queue I are scheduled to run only if the 1~ (i-1) queue is empty. If the processor is servicing a process in queue I, and a new process enters a higher priority queue (1~ (i-1)), then the new

refreshing.3. optimized the code for terminating the process. Supplementary description of date 2004.11.191. If you use this program to terminate the Windows LSASS. EXE process, you can see the one-minute countdown shutdown dialog box similar to the one-minute countdown when the shock wave occurs.2. On the other day, I discussed winlogon.exe with a web friend in the rising community.This program can be tes

pid=0 process we call the idle process belongs to the kernel.Things to do after Init starts:1. Read/etc/inittab to read the default level hypothesis: Read to the default level is 3/etc/init/*.conf# Boot level: (runlevel) # 0: Shutdown # 1: Single user mode # 2: Multiuser mode, NFS not supported # 3: Full multi-user mode, support for Text interface # 4: Reserved

)} consumer: while(1) {p (full); P (mutex); Get fromBuffer//Remove ProductV (mutex); V (empty) conseume; //consumption}Reader Writer's questionDescription: A Data object (file, record) can be shared for multiple concurrent processes. Some of these processes only need to read the content, we call the "reader", and some processes are responsible for updating (reading and writing) the contents of which we call "writer".Rule: " readers " can read shared data objects at the same time ; " The writ