OSP: An Environment for Operating System Projects
OSP: An Environment for Operating System Projects
Overview
Welcome to OSP, an Operating System Project. OSP is a collection of modules that together implement a modern-day operating system. Each module performs a basic operating system service such as device scheduling, cpu scheduling, interrupt handling, file management, memory management, process management, resource management, and interprocess communication.OSP is a simulated system--there is a special module, called SIMCORE, that provides the illusion of a computer system with a dynamically evolving collection of user processes to be multi-programmed. All the other modules of OSP are built to respond appropriately to the simulator-generated events that drive the operating system.Over the course of the semester, you will be given several assignments, each of which normally consists of implementing one of the OSP modules1. You will also be given instructions on how to compile and link your module with the rest of OSP. The end result win be a new and complete operating system, which you can now run in the simulated environment provided by SIMCORE.SIMCORE offers a number of different ways in which you can interact with OSP during simulation. When simulation commences, you will be prompted for the simulation parameters. SIMCORE uses these parameters to decide whether the system should be I/O-bound or cpu-bound, how often to generate requests for various system resources, how long the simulation should last, etc.At any point during simulation, you can request a snapshot: SIMCORE will display various tables that convey the current state of the system, e.g., the state of memory, device queues, event queues, the ready queue, open file tables, and more. You can also change the simulation parameters during a snapshot break. By systematically modifying the simulation parameters, you can test your system under a wide variety of conditions. This enables you to reach a high level of confidence in the correctness of your OSP implementation, and to evaluate its performance characteristics. SIMCORE also has a trace facility for tracking the occurrences of individual events, such as process creation, requests to read a file, requests to send messages, and device interrupts.In order to prevent corruption of the system state, SIMCORE monitors all events in the system, keeping its own copy of the system state. Whenever it detects an unanticipated and fatal error in the behavior of a module, execution is terminated, and an informative error message is printed. If SIMCORE deems the error to be non-fatal, it issues a warning and continues. Between the snapshot breaks, trace facility, and diagnostic capabilities, SIMCORE offers you an extensive environment in which to monitor and debug your programs.This book is organized as follows. Chapter 1 constitutes the OSP programmer's manual and reference guide. Section 1.2 presents the overall architecture of OSP, and the OSP modules are described in detail in the remaining sections. Included in each of the latter sections is a brief discussion of the general concepts of operating system design as they relate to the module in question. Each of these sections also defines the procedures that are imported and exported by the module.Chapter 2 is a user's guide that explains how to compile and run your programs, the meaning of the statistics and error messages generated by OSP, and how to submit your assignments. For ease of reference, a glossary of OSP data structures and data types is also included.To get the big picture of OSP, we suggest that you first read Chapter 2 and then Sections 1.1 to 1.4 of Chapter 1. The remaining sections of Chapter 1 should be dipped into when a particular module has been assigned as a project, or when you simply would like to understand a module in greater detail.OSP was developed at SUNY, Stony Brook, and borrowed several important ideas from an earlier project headed by Art Bernstein. We would like to gratefully acknowledge the contributions of Kit Lo, Nathan Tam, and Andrew Moncrieffe who implemented the first version of OSP. Subsequent enhancements are due to Jusuf Anwar, Lawrence Kwok, and Sankar Raman. Many people have used preliminary versions of OSP in their classes and have given us valuable feedback. In particular, we would like to thank Amr El Abbadi, Michael Fischer, Larry Hall, Bruce Parker, Mark Roth, and Gene Stark. 1Sometimes you will be asked to implement some support modules as well; for example, the device interrupt handler when implementing the device scheduler. 0201548879P04062001Description
Condition Guidelines
Books - New and Used
The following guidelines apply to books:
- New: A brand-new copy with cover and original protective wrapping intact. Books with markings of any kind on the cover or pages, books marked as "Bargain" or "Remainder," or with any other labels attached, may not be listed as New condition.
- Used - Good: All pages and cover are intact (including the dust cover, if applicable). Spine may show signs of wear. Pages may include limited notes and highlighting. May include "From the library of" labels. Shrink wrap, dust covers, or boxed set case may be missing. Item may be missing bundled media.
- Used - Acceptable: All pages and the cover are intact, but shrink wrap, dust covers, or boxed set case may be missing. Pages may include limited notes, highlighting, or minor water damage but the text is readable. Item may but the dust cover may be missing. Pages may include limited notes and highlighting, but the text cannot be obscured or unreadable.
Note: Some electronic material access codes are valid only for one user. For this reason, used books, including books listed in the Used – Like New condition, may not come with functional electronic material access codes.
Shipping & Delivery
Shipping Fees
- Stevens Books offers FREE SHIPPING everywhere in the United States for ALL non-book orders, and $3.99 for each book.
- Packages are shipped from Monday to Friday.
- No additional fees and charges.
Delivery Times
The usual time for processing an order is 24 hours (1 business day), but may vary depending on the availability of products ordered. This period excludes delivery times, which depend on your geographic location.
Estimated delivery times:
- Standard Shipping: 5-8 business days
- Expedited Shipping: 3-5 business days
Shipping method varies depending on what is being shipped.
Tracking
All orders are shipped with a tracking number. Once your order has left our warehouse, a confirmation e-mail with a tracking number will be sent to you. You will be able to track your package at all times.
Damaged Parcel
If your package has been delivered in a PO Box, please note that we are not responsible for any damage that may result (consequences of extreme temperatures, theft, etc.).
If you have any questions regarding shipping or want to know about the status of an order, please contact us or email to support@stevensbooks.com.
Returns & Refunds
You may return most items within 30 days of delivery for a full refund.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items:
- Gift cards
- Downloadable software products
- Some health and personal care items
To complete your return, we require a tracking number, which shows the items which you already returned to us.
There are certain situations where only partial refunds are granted (if applicable)
- Book with obvious signs of use
- CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned more than 30 days after delivery
Items returned to us as a result of our error will receive a full refund,some returns may be subject to a restocking fee of 7% of the total item price, please contact a customer care team member to see if your return is subject. Returns that arrived on time and were as described are subject to a restocking fee.
Items returned to us that were not the result of our error, including items returned to us due to an invalid or incomplete address, will be refunded the original item price less our standard restocking fees.
If the item is returned to us for any of the following reasons, a 15% restocking fee will be applied to your refund total and you will be asked to pay for return shipping:
- Item(s) no longer needed or wanted.
- Item(s) returned to us due to an invalid or incomplete address.
- Item(s) returned to us that were not a result of our error.
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.
Shipping Cost
We'll pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). In other cases, you will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.
Overview
Welcome to OSP, an Operating System Project. OSP is a collection of modules that together implement a modern-day operating system. Each module performs a basic operating system service such as device scheduling, cpu scheduling, interrupt handling, file management, memory management, process management, resource management, and interprocess communication.OSP is a simulated system--there is a special module, called SIMCORE, that provides the illusion of a computer system with a dynamically evolving collection of user processes to be multi-programmed. All the other modules of OSP are built to respond appropriately to the simulator-generated events that drive the operating system.Over the course of the semester, you will be given several assignments, each of which normally consists of implementing one of the OSP modules1. You will also be given instructions on how to compile and link your module with the rest of OSP. The end result win be a new and complete operating system, which you can now run in the simulated environment provided by SIMCORE.SIMCORE offers a number of different ways in which you can interact with OSP during simulation. When simulation commences, you will be prompted for the simulation parameters. SIMCORE uses these parameters to decide whether the system should be I/O-bound or cpu-bound, how often to generate requests for various system resources, how long the simulation should last, etc.At any point during simulation, you can request a snapshot: SIMCORE will display various tables that convey the current state of the system, e.g., the state of memory, device queues, event queues, the ready queue, open file tables, and more. You can also change the simulation parameters during a snapshot break. By systematically modifying the simulation parameters, you can test your system under a wide variety of conditions. This enables you to reach a high level of confidence in the correctness of your OSP implementation, and to evaluate its performance characteristics. SIMCORE also has a trace facility for tracking the occurrences of individual events, such as process creation, requests to read a file, requests to send messages, and device interrupts.In order to prevent corruption of the system state, SIMCORE monitors all events in the system, keeping its own copy of the system state. Whenever it detects an unanticipated and fatal error in the behavior of a module, execution is terminated, and an informative error message is printed. If SIMCORE deems the error to be non-fatal, it issues a warning and continues. Between the snapshot breaks, trace facility, and diagnostic capabilities, SIMCORE offers you an extensive environment in which to monitor and debug your programs.This book is organized as follows. Chapter 1 constitutes the OSP programmer's manual and reference guide. Section 1.2 presents the overall architecture of OSP, and the OSP modules are described in detail in the remaining sections. Included in each of the latter sections is a brief discussion of the general concepts of operating system design as they relate to the module in question. Each of these sections also defines the procedures that are imported and exported by the module.Chapter 2 is a user's guide that explains how to compile and run your programs, the meaning of the statistics and error messages generated by OSP, and how to submit your assignments. For ease of reference, a glossary of OSP data structures and data types is also included.To get the big picture of OSP, we suggest that you first read Chapter 2 and then Sections 1.1 to 1.4 of Chapter 1. The remaining sections of Chapter 1 should be dipped into when a particular module has been assigned as a project, or when you simply would like to understand a module in greater detail.OSP was developed at SUNY, Stony Brook, and borrowed several important ideas from an earlier project headed by Art Bernstein. We would like to gratefully acknowledge the contributions of Kit Lo, Nathan Tam, and Andrew Moncrieffe who implemented the first version of OSP. Subsequent enhancements are due to Jusuf Anwar, Lawrence Kwok, and Sankar Raman. Many people have used preliminary versions of OSP in their classes and have given us valuable feedback. In particular, we would like to thank Amr El Abbadi, Michael Fischer, Larry Hall, Bruce Parker, Mark Roth, and Gene Stark. 1Sometimes you will be asked to implement some support modules as well; for example, the device interrupt handler when implementing the device scheduler. 0201548879P04062001Description
Condition Guidelines
Books - New and Used
The following guidelines apply to books:
- New: A brand-new copy with cover and original protective wrapping intact. Books with markings of any kind on the cover or pages, books marked as "Bargain" or "Remainder," or with any other labels attached, may not be listed as New condition.
- Used - Good: All pages and cover are intact (including the dust cover, if applicable). Spine may show signs of wear. Pages may include limited notes and highlighting. May include "From the library of" labels. Shrink wrap, dust covers, or boxed set case may be missing. Item may be missing bundled media.
- Used - Acceptable: All pages and the cover are intact, but shrink wrap, dust covers, or boxed set case may be missing. Pages may include limited notes, highlighting, or minor water damage but the text is readable. Item may but the dust cover may be missing. Pages may include limited notes and highlighting, but the text cannot be obscured or unreadable.
Note: Some electronic material access codes are valid only for one user. For this reason, used books, including books listed in the Used – Like New condition, may not come with functional electronic material access codes.
Shipping & Delivery
Shipping Fees
- Stevens Books offers FREE SHIPPING everywhere in the United States for ALL non-book orders, and $3.99 for each book.
- Packages are shipped from Monday to Friday.
- No additional fees and charges.
Delivery Times
The usual time for processing an order is 24 hours (1 business day), but may vary depending on the availability of products ordered. This period excludes delivery times, which depend on your geographic location.
Estimated delivery times:
- Standard Shipping: 5-8 business days
- Expedited Shipping: 3-5 business days
Shipping method varies depending on what is being shipped.
Tracking
All orders are shipped with a tracking number. Once your order has left our warehouse, a confirmation e-mail with a tracking number will be sent to you. You will be able to track your package at all times.
Damaged Parcel
If your package has been delivered in a PO Box, please note that we are not responsible for any damage that may result (consequences of extreme temperatures, theft, etc.).
If you have any questions regarding shipping or want to know about the status of an order, please contact us or email to support@stevensbooks.com.
Returns & Refunds
You may return most items within 30 days of delivery for a full refund.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items:
- Gift cards
- Downloadable software products
- Some health and personal care items
To complete your return, we require a tracking number, which shows the items which you already returned to us.
There are certain situations where only partial refunds are granted (if applicable)
- Book with obvious signs of use
- CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned more than 30 days after delivery
Items returned to us as a result of our error will receive a full refund,some returns may be subject to a restocking fee of 7% of the total item price, please contact a customer care team member to see if your return is subject. Returns that arrived on time and were as described are subject to a restocking fee.
Items returned to us that were not the result of our error, including items returned to us due to an invalid or incomplete address, will be refunded the original item price less our standard restocking fees.
If the item is returned to us for any of the following reasons, a 15% restocking fee will be applied to your refund total and you will be asked to pay for return shipping:
- Item(s) no longer needed or wanted.
- Item(s) returned to us due to an invalid or incomplete address.
- Item(s) returned to us that were not a result of our error.
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.
Shipping Cost
We'll pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). In other cases, you will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.
Oops!
Sorry, it looks like some products are not available in selected quantity.
