Time.sleep(0.0125) not available within Linux

[Blubaugh, David A.]

To All,


I was wondering if anyone has come across the issue of not being allowed
to have the following within a Python script operating under Linux:

time.sleep(0.0125)

It appears that I am not allowed to have the object sleep. Has anyone
encountered this specific issue before in the past?


Thank You,


David Blubaugh







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[Lawrence D'Oliveiro]

No, I have not. And I doubt anybody else has.

Just a thought, your minimum sleep time is probably limited by the
resolution of the system "HZ" clock. Type

less /proc/config.gz

and search for the value of the "CONFIG_HZ" setting. On the Athlon 64
machine I'm using to write this, it's 250, which should allow for sleep
intervals in multiples of 0.004 seconds.

 

[Steven D'Aprano]

Just a thought, your minimum sleep time is probably limited by the
resolution of the system "HZ" clock. Type

less /proc/config.gz

$ less /proc/config.gz
/proc/config.gz: No such file or directory


What OS are you using?

 

[Lawrence D'Oliveiro]

$ less /proc/config.gz
/proc/config.gz: No such file or directory


What OS are you using?

The one named in the subject line?

 

[Steven D'Aprano]

The one named in the subject line?

Are you asking me or telling me?


I've tried on five different Linux machines I have access to, and there
is no such /proc/config.gz on any of them:

two different versions of Centos
two versions of Fedora
one version of Ubuntu

So let me rephrase my question... what *specific* OS are you using?

 

[Lawrence D'Oliveiro]

Are you asking me or telling me?


I've tried on five different Linux machines I have access to, and there
is no such /proc/config.gz on any of them:

two different versions of Centos
two versions of Fedora
one version of Ubuntu

So let me rephrase my question... what *specific* OS are you using?

<http://lxr.linux.no/linux+v2.6.26.5/kernel/configs.c#L82>

 

[jkn]

Are you asking me or telling me?

I've tried on five different Linux machines I have access to, and there
is no such /proc/config.gz on any of them:

/proc/config.gz is not directly connected with a specific linux
distribution; it's a function of the kernel build configuration. If
the appropriate setting is enabled, then /proc/config.gz will show
(via eg. zcat) the equivalent of the .config file used to build the
kernel you are actually running. It's a useful feature in all linuces,
going back quite a way IIRC.

J^n

 

[Edel SM]

helllo,


or: less /boot/config-`uname -r`

The one named in the subject line?

 

[Lawrence D'Oliveiro]

Never assume somebody reading the article and attempting to
help you can see the subject line.

Why not?

 

[Lawrence D'Oliveiro]

Because it might not be. It depends on the user's newsreader
and editor settings.

So, should I not assume that they can see the content as well, because it
might not be visible, depending on the user's newsreader and editor
settings?

 

[Gabriel Genellina]

En Sat, 27 Sep 2008 01:46:45 -0300, Lawrence D'Oliveiro

So, should I not assume that they can see the content as well, because it
might not be visible, depending on the user's newsreader and editor
settings?

Of course not. But the space allowed for the subject line may be limited -
body usually wraps, but subject might not. Add a few Re: Rv: at the start
and even fewer characters are displayed.
I currently see the subject line shortened at: available wi...

 

[Michael Torrie]

Just a thought, your minimum sleep time is probably limited by the
resolution of the system "HZ" clock. Type

less /proc/config.gz

and search for the value of the "CONFIG_HZ" setting. On the Athlon 64
machine I'm using to write this, it's 250, which should allow for sleep
intervals in multiples of 0.004 seconds.

Since most distributions do not create this file in /proc for whatever
reason, and some people are being deliberately obtuse, does anyone know
how to ask the kernel what the timer resolution is? Is it stored
anywhere else in /proc or /sys? I kind of think most distros set it to
1000 Hz, but I'm not sure.