O9.21-641(.1) - OPERA_NUM_XSHM

Robt. W. Fletcher Jr · External Since: Jun 02, 2004 Posts: 260

I don't know if anybody knows, but I'll ask the question anyway.

During one on the betas (O9.20-557(.5 or .6)) I had an issue w/ the
proper display of opera. See this link:

http://groups.google.com/group/opera.linux/browse_thread/thread/b73ed1...37c0013

Tommy Olsen recommended setting OPERA_NUM_XSHM to 0.

I've also seen posts on the Opera forums about people setting
OPERA_NUM_XSHM to 1000 and getting 'better' performanace.

Assumption/Questions follow:

1. 0 indicates that the use of XSHM should be disabled.

2. I have no idea what the default value is?

3. I have no idea what the max value is (i.e. set by the user)?

4. I have no idea what 1000 refers to (memory?/kilobytes?/etc?)

5. It 'might' be nice to know the answers to 2.), 3.) and 4.)

Note: I assuming XSHM refers to:

~% cat /var/log/Xorg.0.0.log | grep SHM
(II) Initializing built-in extension MIT-SHM

Comments?

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-rwf

Robt. W. Fletcher Jr · External Since: Jun 02, 2004 Posts: 260

"Robt. W. Fletcher Jr" <me.RemoveThis@wa.us> writes:

> 2. I have no idea what the default value is?

Oppps! Cockpit error ;-( Tommy Olsen clearly saided that 100 is the default.

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-rwf

csant · External Since: Jul 18, 2006 Posts: 6

On Mon, 25 Jun 2007 18:49:44 +0200, Robt. W. Fletcher Jr <me.TakeThisOut@wa.us> wrote:

> 1. 0 indicates that the use of XSHM should be disabled.

Correct.

> 2. I have no idea what the default value is?

100

> 3. I have no idea what the max value is (i.e. set by the user)?
>
> 4. I have no idea what 1000 refers to (memory?/kilobytes?/etc?)

It refers to the number of shared memory segments.

ipcs -mp | grep <opera_process_ID> | wc -l

/c

csant · External Since: Jul 18, 2006 Posts: 6

On Mon, 25 Jun 2007 21:24:27 +0200, csant <csant.DeleteThis@opera.com> wrote:

> On Mon, 25 Jun 2007 18:49:44 +0200, Robt. W. Fletcher Jr <me.DeleteThis@wa.us>
> wrote:
>
>> 1. 0 indicates that the use of XSHM should be disabled.
>
> Correct.
>
>> 2. I have no idea what the default value is?
>
> 100
>
>> 3. I have no idea what the max value is (i.e. set by the user)?

Sorry, missed this one. 4096.

>> 4. I have no idea what 1000 refers to (memory?/kilobytes?/etc?)
>
> It refers to the number of shared memory segments.
>
> ipcs -mp | grep <opera_process_ID> | wc -l