TPM: A More Trustworthy Solution to Computer Security
... developed which executed the basic system services like interrupt handling, inter process communication, memory management, file system, etc. in the kernel space. Applications and libraries were included in the less privileged user space. Applications used well defined system call interface to inter ...
... developed which executed the basic system services like interrupt handling, inter process communication, memory management, file system, etc. in the kernel space. Applications and libraries were included in the less privileged user space. Applications used well defined system call interface to inter ...
INF 5070 – Media Storage and Distribution Systems
... exclusive: only one process at a time can use it, e.g., CPU shared: can be used by several concurrent processed, e.g., memory single: exists only once in the system, e.g., loudspeaker multiple: several within a system, e.g., CPUs in a multi-processor system ...
... exclusive: only one process at a time can use it, e.g., CPU shared: can be used by several concurrent processed, e.g., memory single: exists only once in the system, e.g., loudspeaker multiple: several within a system, e.g., CPUs in a multi-processor system ...
chapter 5
... Response: Linux is the most popular and powerful alternative to the Windows operating system. Mac OS is considered to be one of the most innovative operating systems. UNIX is used by powerful microcomputers and by servers on the Web. ...
... Response: Linux is the most popular and powerful alternative to the Windows operating system. Mac OS is considered to be one of the most innovative operating systems. UNIX is used by powerful microcomputers and by servers on the Web. ...
Processes - UCSB Computer Science
... exec system call used after a fork to replace the process’ memory space with a new program ...
... exec system call used after a fork to replace the process’ memory space with a new program ...
Disks
... Disk Writing Strategies • There are none • The best one can do is – collect together a sequence of contiguous (or nearby) sectors for writing – Write them in a single sequence of disk actions ...
... Disk Writing Strategies • There are none • The best one can do is – collect together a sequence of contiguous (or nearby) sectors for writing – Write them in a single sequence of disk actions ...
PPT
... kernel threads may be overly general, in order to support needs of different users, languages, etc. the kernel doesn’t trust the user, so there must be lots of checking on kernel calls ...
... kernel threads may be overly general, in order to support needs of different users, languages, etc. the kernel doesn’t trust the user, so there must be lots of checking on kernel calls ...
A Survey on Virtualization Technologies
... more VMs where every VM provides facilities to an OS or application to believe as if it runs in a normal environment and directly on the hardware. Virtualization at the OS level work at on top of or as a module in OS to provide a virtualized system call interface. Since system call invocation is th ...
... more VMs where every VM provides facilities to an OS or application to believe as if it runs in a normal environment and directly on the hardware. Virtualization at the OS level work at on top of or as a module in OS to provide a virtualized system call interface. Since system call invocation is th ...
SafeDrive: Safe and Recoverable Extensions Using Language-Based Techniques
... In this paper, we focus on the specific problem of improving device driver reliability. Previous systems have attempted to address this problem using some form of lightweight protection domain for extensions. For example, the Nooks project [32, 33] runs Linux device drivers in an isolated portion of ...
... In this paper, we focus on the specific problem of improving device driver reliability. Previous systems have attempted to address this problem using some form of lightweight protection domain for extensions. For example, the Nooks project [32, 33] runs Linux device drivers in an isolated portion of ...
rtos-concepts
... 1) It sorts the tasks from the shortest period to the longest period. Then it defines the critical set as the first N tasks such that the total CPU load factor does not exceed 100%. These tasks are guaranteed not to fail even during a transient ...
... 1) It sorts the tasks from the shortest period to the longest period. Then it defines the critical set as the first N tasks such that the total CPU load factor does not exceed 100%. These tasks are guaranteed not to fail even during a transient ...
Trusted Operating Systems
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
What is a file system? - Montana State University
... • Multics, Unix, Minux, and Linux originally supported only one file system. – They only understood one type of layout on disk for directories and files. – Because of its origins, Linux initially supported just the Minix file system. • Limited to small partitions and short filenames ...
... • Multics, Unix, Minux, and Linux originally supported only one file system. – They only understood one type of layout on disk for directories and files. – Because of its origins, Linux initially supported just the Minix file system. • Limited to small partitions and short filenames ...
ch8
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the ...
... 10. Correct the page table and other tables to show page is now in memory 11. Wait for the CPU to be allocated to this process again 12. Restore the user registers, process state, and new page table, and then resume the ...
Disco: Running Commodity Operating Systems on Scalable Multiprocessors
... impact on many of the standard modules that make up a modem system, such as virtual memory management and the scheduler. As a result, the system software for these machines is generally delivered significantly later than the hardware. Even when the changes are functionally complete, they are likely ...
... impact on many of the standard modules that make up a modem system, such as virtual memory management and the scheduler. As a result, the system software for these machines is generally delivered significantly later than the hardware. Even when the changes are functionally complete, they are likely ...
OS Lab Manual
... Printers, memories, input/output devices, files, etc., are examples of computer resources. So why an operating is called a resource manager. Some of important tasks, which a typical modern operating system has to perform, are given below: ...
... Printers, memories, input/output devices, files, etc., are examples of computer resources. So why an operating is called a resource manager. Some of important tasks, which a typical modern operating system has to perform, are given below: ...
presentation source
... the queue. Problem now becomes one of much busy waiting as the receiver polls multiple queues in a loop (Figure 8.11 (b)). – Can create children to handle each queue you want to receive on using traditional blocking (Figure 8.11 (a)). – Can create a new system call that permits a process to block wa ...
... the queue. Problem now becomes one of much busy waiting as the receiver polls multiple queues in a loop (Figure 8.11 (b)). – Can create children to handle each queue you want to receive on using traditional blocking (Figure 8.11 (a)). – Can create a new system call that permits a process to block wa ...
An I/O Architecture for Mikrokernel
... as workhorse on a core operating system, next to application processes which have requirements not supported by the original workhorse alone. Examples include off-the-shelf operating systems running on real-time executives or trusted kernels. For such architectures, several challenges and opportunit ...
... as workhorse on a core operating system, next to application processes which have requirements not supported by the original workhorse alone. Examples include off-the-shelf operating systems running on real-time executives or trusted kernels. For such architectures, several challenges and opportunit ...
Chap. 9, Virtual Memory Management
... Each program takes less memory while running -> more programs run at the same time ...
... Each program takes less memory while running -> more programs run at the same time ...
Chapter 9 - cse.sc.edu
... Each program takes less memory while running -> more programs run at the same time ...
... Each program takes less memory while running -> more programs run at the same time ...