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Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.
Correct answer is '80000'. Can you explain this answer?
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Most Upvoted Answer
Consider a computer system with DMA support. The DMA module is transfe...
Processor Cycle and DMA
Processor Cycle:
A processor cycle refers to the time it takes for a processor to complete one instruction. It is typically measured in terms of frequency, such as megahertz (MHz) or gigahertz (GHz). For example, a 2 MHz processor completes 2 million cycles per second.
DMA (Direct Memory Access):
DMA is a technique used in computer systems to enable devices to transfer data directly to and from memory without involving the CPU. This allows for faster and more efficient data transfer, as the CPU is not required to be actively involved in the process.
Data Transfer Rate Calculation:
To calculate the data transfer rate of a device, we need to consider the processor cycle and the percentage of cycles used for DMA.
Given:
- Processor frequency: 2 MHz
- Percentage of cycles used for DMA: 0.5%
Step 1: Calculate the number of cycles used for DMA per second.
- Total cycles per second = Processor frequency
- Cycles used for DMA per second = Total cycles per second * Percentage of cycles used for DMA
- Cycles used for DMA per second = 2,000,000 * 0.005
Step 2: Calculate the number of characters transferred per second.
- Each cycle transfers one 8-bit character.
- Characters transferred per second = Cycles used for DMA per second
Step 3: Convert characters to bits.
- 1 character = 8 bits
- Bits transferred per second = Characters transferred per second * 8
Step 4: Calculate the data transfer rate in bits per second.
- Data transfer rate = Bits transferred per second
Calculation:
- Cycles used for DMA per second = 2,000,000 * 0.005 = 10,000 cycles per second
- Characters transferred per second = Cycles used for DMA per second = 10,000 characters per second
- Bits transferred per second = Characters transferred per second * 8 = 10,000 * 8 = 80,000 bits per second
Therefore, the data transfer rate of the device is 80,000 bits per second.
Processor Cycle:
A processor cycle refers to the time it takes for a processor to complete one instruction. It is typically measured in terms of frequency, such as megahertz (MHz) or gigahertz (GHz). For example, a 2 MHz processor completes 2 million cycles per second.
DMA (Direct Memory Access):
DMA is a technique used in computer systems to enable devices to transfer data directly to and from memory without involving the CPU. This allows for faster and more efficient data transfer, as the CPU is not required to be actively involved in the process.
Data Transfer Rate Calculation:
To calculate the data transfer rate of a device, we need to consider the processor cycle and the percentage of cycles used for DMA.
Given:
- Processor frequency: 2 MHz
- Percentage of cycles used for DMA: 0.5%
Step 1: Calculate the number of cycles used for DMA per second.
- Total cycles per second = Processor frequency
- Cycles used for DMA per second = Total cycles per second * Percentage of cycles used for DMA
- Cycles used for DMA per second = 2,000,000 * 0.005
Step 2: Calculate the number of characters transferred per second.
- Each cycle transfers one 8-bit character.
- Characters transferred per second = Cycles used for DMA per second
Step 3: Convert characters to bits.
- 1 character = 8 bits
- Bits transferred per second = Characters transferred per second * 8
Step 4: Calculate the data transfer rate in bits per second.
- Data transfer rate = Bits transferred per second
Calculation:
- Cycles used for DMA per second = 2,000,000 * 0.005 = 10,000 cycles per second
- Characters transferred per second = Cycles used for DMA per second = 10,000 characters per second
- Bits transferred per second = Characters transferred per second * 8 = 10,000 * 8 = 80,000 bits per second
Therefore, the data transfer rate of the device is 80,000 bits per second.
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Community Answer
Consider a computer system with DMA support. The DMA module is transfe...
We have given 2 MHz processor, 8-bit character in one CPU cycle, 0.5% of CPU cycles are used for DMA.
Frequency of processor = 2 MHz
In 1 second = 2 × 106 cycles
From these cycles 0.5% cycles are used for DMA transfers
= 0.005 × 2 × 106
= 10000 cycles per second used for DMA transfer
And also 8 bit character in one CPU cycle.
= 10000 × 8 = 80000 bits in each second (total)
So, transfer rate = 80000 bits per second .
Hence, the correct answer is 80000.
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Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer?
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Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer?.
Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer?.
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Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer?, a detailed solution for Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? has been provided alongside types of Consider a computer system with DMA support. The DMA module is transferring one 8-bit character in one CPU cycle from a device to memory through cycle stealing at regular intervals. Consider a 2 MHz processor. If 0.5% processor cycles are used for DMA, the data transfer rate of the device is bits per second.Correct answer is '80000'. Can you explain this answer? theory, EduRev gives you an
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