Sleep - Revision history

Leo at 01:12, 30 December 2021

2021-12-30T01:12:03Z

← Older revision		Revision as of 01:12, 30 December 2021
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	\| lang = bash		\| lang = bash
	}}Synchronizing bash scripts with this method works quite well as long as all the machines are using the same NTP server. I was able to precisely synchronize an audio file playing across an entire computer lab of over 100 machines through the PC speaker back in 2017.		}}Synchronizing bash scripts with this method works quite well as long as all the machines are using the same NTP server. I was able to precisely synchronize an audio file playing across an entire computer lab of over 100 machines through the PC speaker back in 2017.

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Leo at 23:10, 12 July 2021

2021-07-12T23:10:24Z

← Older revision		Revision as of 23:10, 12 July 2021
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	<br />		<br />Sleep is a command that sleeps for a certain amount of time. For millisecond sleeps, use <code>usleep</code>.

	==Sleep to the nearest minute or hour==		==Sleep to the nearest minute or hour==
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	usleep $((3600000 - (`date +%s%N` / 1000) % 3600000 ))		usleep $((3600000 - (`date +%s%N` / 1000) % 3600000 ))
	\| lang = bash		\| lang = bash
	}}Synchronizing bash scripts with this method works quite well as long as all the machines are using the same NTP server. I was able to precisely synchronize an audio file playing across an entire computer lab of over 100 machines through the PC speaker.		}}Synchronizing bash scripts with this method works quite well as long as all the machines are using the same NTP server. I was able to precisely synchronize an audio file playing across an entire computer lab of over 100 machines through the PC speaker back in 2017.

Leo at 23:09, 12 July 2021

2021-07-12T23:09:16Z

← Older revision		Revision as of 23:09, 12 July 2021
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	<br />		<br />

	== Sleep to the nearest minute or hour ==		==Sleep to the nearest minute or hour==
	This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour.		This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour.
	{{Highlight		{{Highlight
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	}}		}}

	=== With millisecond precision ===		===With millisecond precision===
	If you need to synchronize a task by the millisecond, you can use <code>date +%s%N</code> which will print the timestamp with nanoseconds. Divide by 1000 for milliseconds and apply the same logic as above.		If you need to synchronize a task by the millisecond, you can use <code>date +%s%N</code> which will print the timestamp with nanoseconds. Divide by 1000 for milliseconds and apply the same logic as above.{{Highlight
	~~<br~~ />		\| code = # Next minute
			usleep $((60000 - (`date +%s%N` / 1000) % 60000 ))

			# Next hour
			usleep $((3600000 - (`date +%s%N` / 1000) % 3600000 ))
			\| lang = bash
			}}Synchronizing bash scripts with this method works quite well as long as all the machines are using the same NTP server. I was able to precisely synchronize an audio file playing across an entire computer lab of over 100 machines through the PC speaker.

Leo: Created page with "
== Sleep to the nearest minute or hour == This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour. {{High..."

2021-07-12T23:04:15Z

Created page with "<br /> == Sleep to the nearest minute or hour == This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour. {{High..."

New page

<br />

== Sleep to the nearest minute or hour ==
This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour.
{{Highlight
| code = # Next minute
sleep $((60 - `date +%s` % 60))

# Next hour
sleep $((3600 - `date +%s` % 3600))
| lang = bash
}}

=== With millisecond precision ===
If you need to synchronize a task by the millisecond, you can use <code>date +%s%N</code> which will print the timestamp with nanoseconds. Divide by 1000 for milliseconds and apply the same logic as above.
<br />

Sleep - Revision history

Leo at 01:12, 30 December 2021

Leo at 23:10, 12 July 2021

Leo at 23:09, 12 July 2021

Leo: Created page with " == Sleep to the nearest minute or hour == This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour. {{High..."

Leo: Created page with "
== Sleep to the nearest minute or hour == This can be done with some bash arithmetic and applying modulus to 60 seconds for 1 minute or 3600 seconds for 1 hour. {{High..."