Difference between revisions of "Access time"
From Computer History Wiki
(Access time on disks) |
m (prepare for move) |
||
| (One intermediate revision by the same user not shown) | |||
| Line 1: | Line 1: | ||
In [[main memory]], the '''access time''' (sometimes '''response time''') is the time period between the start of a read access cycle, and the point in time when the data is returned to the requestor. | In [[main memory]], the '''access time''' (sometimes '''response time''') is the time period between the start of a read access cycle, and the point in time when the data is returned to the requestor. | ||
| − | In [[Dynamic RAM|DRAM]] memories, if the memory is in the middle of a [[refresh]] cycle when the request arrives, that can delay the memory's response - and thus the access time for that particular cycle. | + | In [[Dynamic RAM|DRAM]] memories, if the memory is in the middle of a [[memory refresh]] cycle when the request arrives, that can delay the memory's response - and thus the access time for that particular cycle. |
For [[secondary storage]], such as [[disk]]s, it refers to the time between when the disk is asked to perform an operation on a given block, and when the operation begins. | For [[secondary storage]], such as [[disk]]s, it refers to the time between when the disk is asked to perform an operation on a given block, and when the operation begins. | ||
| Line 10: | Line 10: | ||
{{semi-stub}} | {{semi-stub}} | ||
| + | |||
| + | [[Category: Memory Basics]] | ||
| + | [[Category: Device Basics]] | ||
Latest revision as of 01:11, 20 September 2022
In main memory, the access time (sometimes response time) is the time period between the start of a read access cycle, and the point in time when the data is returned to the requestor.
In DRAM memories, if the memory is in the middle of a memory refresh cycle when the request arrives, that can delay the memory's response - and thus the access time for that particular cycle.
For secondary storage, such as disks, it refers to the time between when the disk is asked to perform an operation on a given block, and when the operation begins.
