Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-26 Thread Alan Chandler

On 25/11/11 23:52, Bob Proulx wrote:

Alan Chandler wrote:

Over the last few weeks iceweasel has started to operate strangely.
The whole application stops whilst trying to open a web page.  you
can't switch tabs.  Sometimes it gets SO BAD that the entire desktop
locks for a while.

Am I the only person experiencing this.


I am wondering if you are running into the fsync() debacle?  Rather
than point to any particular article I will just point to the class of
them since the discussion has been endless and involved.


Might be.  Because this is my desktop which powers down at night I have 
to use anacron to run my daily backup.  This rsyncs my virtual machine 
images (about 70GB of them) to another machine as backup and seems to be 
faily heavy on disk usage for a few hours each morning.  That is when I 
get the worst experience - reading slashdot before I start the day.





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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-26 Thread Bob Proulx
Alan Chandler wrote:
 Bob Proulx wrote:
 I am wondering if you are running into the fsync() debacle?
 
 Might be.  Because this is my desktop which powers down at night I
 have to use anacron to run my daily backup.  This rsyncs my virtual
 machine images (about 70GB of them) to another machine as backup and
 seems to be faily heavy on disk usage for a few hours each morning.
 That is when I get the worst experience - reading slashdot before I
 start the day.

70G would be much larger than any expected buffer cache.  I would
expect that would thrash your file buffer cache completely.  Are the
contents of the images changing daily?

This might be interesting reading concerning this issue.  Patches to
rsync and benchmarks of it using posix_fadvise() with
POSIX_FADV_DONTNEED and POSIX_FADV_NOREUSE flags to avoid file buffer
cache thrash.

  http://lwn.net/Articles/449420/

Or you could simply move the start of the backup earlier so as to
finish before you get to slashdot in the morning.  :-)  That is
probably what I would do.

Bob


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Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Alan Chandler
Over the last few weeks iceweasel has started to operate strangely.  The 
whole application stops whilst trying to open a web page.  you can't 
switch tabs.  Sometimes it gets SO BAD that the entire desktop locks for 
a while.


Am I the only person experiencing this.

I suspect it has something to do with Javascript or Flash - Slashdot is 
a good candidate to cause this to happen - although it often appears 
from the status bar at the bottom that it is trying to fetch some advert 
info.



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http://www.chandlerfamily.org.uk


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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Roman Khomasuridze
Yes, I mentioned that in recent days, and from what i observed, it's more
of a javascript, because i didn't experience freezes on flash heavy
websites.

Regards

Roman

On Fri, Nov 25, 2011 at 1:12 PM, Alan Chandler
a...@chandlerfamily.org.ukwrote:

 Over the last few weeks iceweasel has started to operate strangely.  The
 whole application stops whilst trying to open a web page.  you can't switch
 tabs.  Sometimes it gets SO BAD that the entire desktop locks for a while.

 Am I the only person experiencing this.

 I suspect it has something to do with Javascript or Flash - Slashdot is a
 good candidate to cause this to happen - although it often appears from the
 status bar at the bottom that it is trying to fetch some advert info.


 --
 Alan Chandler
 http://www.chandlerfamily.org.**uk http://www.chandlerfamily.org.uk


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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Javier Barroso
On Fri, Nov 25, 2011 at 10:12 AM, Alan Chandler
a...@chandlerfamily.org.uk wrote:
 Over the last few weeks iceweasel has started to operate strangely.  The
 whole application stops whilst trying to open a web page.  you can't switch
 tabs.  Sometimes it gets SO BAD that the entire desktop locks for a while.

 Am I the only person experiencing this.

 I suspect it has something to do with Javascript or Flash - Slashdot is a
 good candidate to cause this to happen - although it often appears from the
 status bar at the bottom that it is trying to fetch some advert info.
It happens to me too, I think with some javascript which I don't identified yet.

I remember read about this kind of issue was going to be fixed using
¿one thread by tab? There is a mozilla page talking about [1]

Maybe there are any bug related ?

Regards,
[1] http://kb.mozillazine.org/Firefox_hangs#Hang_loading_sites_with_JavaScript


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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Hugo Vanwoerkom

Alan Chandler wrote:
Over the last few weeks iceweasel has started to operate strangely.  The 
whole application stops whilst trying to open a web page.  you can't 
switch tabs.  Sometimes it gets SO BAD that the entire desktop locks for 
a while.


Am I the only person experiencing this.

I suspect it has something to do with Javascript or Flash - Slashdot is 
a good candidate to cause this to happen - although it often appears 
from the status bar at the bottom that it is trying to fetch some advert 
info.





I found the hangs as I call them annoying and left iceweasel for 
google-chrome-beta which does not have the problem.


Hugo


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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Steve B
On Friday 25 November 2011 10:19:58 Javier Barroso wrote:
 
 I remember read about this kind of issue was going to be fixed using
 ¿one thread by tab? There is a mozilla page talking about [1]
 


Last week Mozilla announced that their multi-processus project for Firefox 
(Electrolysis) is delayed because it's eating Mozilla's manpower.
Smaller projects would probably receive highlights.

To diet websites and avoid crap I'm using NoScript addon and friends.


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Re: Has iceweasel (or maybe flash) gone single threaded

2011-11-25 Thread Bob Proulx
Alan Chandler wrote:
 Over the last few weeks iceweasel has started to operate strangely.
 The whole application stops whilst trying to open a web page.  you
 can't switch tabs.  Sometimes it gets SO BAD that the entire desktop
 locks for a while.
 
 Am I the only person experiencing this.

I am wondering if you are running into the fsync() debacle?  Rather
than point to any particular article I will just point to the class of
them since the discussion has been endless and involved.

  http://www.google.com/search?q=firefox+fsync

Except that problem is getting to be pretty well aged now.  Nothing
changed recently.  You were probably already aware of it.  But you may
be experiencing it recently now due to changes in behavior, such as
compiling a kernel in the background while web browsing which will
trigger this problem.  Or something else.

Bob


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