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Tara2
Posted: Tuesday, April 6, 2021 5:33:50 AM

Rank: Advanced Member

Joined: 11/8/2017
Posts: 3,551
Neurons: 13,036
Can you please explain ' lock-step '?

At one extreme, processors can be completely synchronous, performing communication and computation in perfect lock-step synchrony. At the other extreme, they can be completely asynchronous, taking steps at arbitrary speeds and in arbitrary orders.
FounDit
Posted: Tuesday, April 6, 2021 11:02:39 AM

Rank: Advanced Member

Joined: 9/19/2011
Posts: 15,647
Neurons: 74,672
Tara2 wrote:
Can you please explain ' lock-step '?

At one extreme, processors can be completely synchronous, performing communication and computation in perfect lock-step synchrony. At the other extreme, they can be completely asynchronous, taking steps at arbitrary speeds and in arbitrary orders.


Lock-step means doing things at exactly the same time, such as soldiers marching together, each left and right foot hitting the ground at the same time. This is where the term comes from. All the steps are "locked" together.
Tara2
Posted: Tuesday, April 6, 2021 11:48:30 AM

Rank: Advanced Member

Joined: 11/8/2017
Posts: 3,551
Neurons: 13,036
FounDit wrote:
Tara2 wrote:
Can you please explain ' lock-step '?

At one extreme, processors can be completely synchronous, performing communication and computation in perfect lock-step synchrony. At the other extreme, they can be completely asynchronous, taking steps at arbitrary speeds and in arbitrary orders.


Lock-step means doing things at exactly the same time, such as soldiers marching together, each left and right foot hitting the ground at the same time. This is where the term comes from. All the steps are "locked" together.

Interesting. Many thanks!
Sorry FounDit, what does 'lock' mean here, please?
FounDit
Posted: Tuesday, April 6, 2021 11:57:22 AM

Rank: Advanced Member

Joined: 9/19/2011
Posts: 15,647
Neurons: 74,672
Tara2 wrote:
FounDit wrote:
Tara2 wrote:
Can you please explain ' lock-step '?

At one extreme, processors can be completely synchronous, performing communication and computation in perfect lock-step synchrony. At the other extreme, they can be completely asynchronous, taking steps at arbitrary speeds and in arbitrary orders.


Lock-step means doing things at exactly the same time, such as soldiers marching together, each left and right foot hitting the ground at the same time. This is where the term comes from. All the steps are "locked" together.

Interesting. Many thanks!
Sorry FounDit, what does 'lock' mean here, please?


Here, it means to tie things together, to connect them so they aren't separate any longer. The things move at the same time, occur at the same time, are performed at the same time. The are "locked" together as if there were a lock and chain forcing them to move together.
Tara2
Posted: Tuesday, April 6, 2021 12:33:51 PM

Rank: Advanced Member

Joined: 11/8/2017
Posts: 3,551
Neurons: 13,036
Great. Many thanks!!!
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