My problem is as follows: everything worked fine with my Firefox on all my computers. All of them were sync'ed with firefox sync (including my mobile).
Then, on my Window… (tuilleadh eolais)
My problem is as follows: everything worked fine with my Firefox on all my computers. All of them were sync'ed with firefox sync (including my mobile).
Then, on my Windows 7 Home Premium 64-bit desktop (Q9450 CPU, 4Gb of RAM, Asus P5KC motherboard Intel P35-based), I replaced the motherboard and the CPU. Obviously I reinstalled Windows from scratch and Firefox as well. From plugins, I installed only Adblock plus with the Easylist and malwaredomains lists. The same plugin (along with others) were installed previously on my desktop. I initiated a new sync and my bookmarks and everything obviously appeared ok.
On this new hardware platform (Q9650 CPU, 8Gb RAM, Asus Rampage Extreme, Intel X48-based) I experienced strange freezes, which felt that they ranged from 10" to 30". These happen while I am trying to do an action, like fill in a form for example. Firefox does not freeze while it is idle. When this freeze takes place, it affects only firefox. Nothing else gets affected. Made a clean uninstall, re-installed with only adblock plus and enabled firefox sync. Same issue...
It drives my crazy because both the motherboard and the cpu are better than the one I used to have. The system is not overclocked. All my other firefox installations work perfectly.
I should add that I also tried checking with certain sqlite commands the integrity of all sqlite databases. All were ok. Additionally, I deleted this system from sync, completely uninstalled ff, deleted the relevant Application data subdirectories and made a fresh install, only with adblock plus and re-enabled sync. Same issue. Also tried using other memory DIMMs. Same thing again.
Atm, it feels like this is either motherboard related OR there is a "blocker" somewhere. What strikes me a lot is that it works perfectly on all my other computers (remember that all of them are firefox sync'ed) and that the problem appears on the strongest of these machines...
I've read some bug reports in bugzilla that *seem* to be similar to mine, but can't quite correlate the same. Then I stumbled an excellent process explorer from winternals (mentioned in this thread here as well), which you can get from http://technet.microsoft.com/en-us/sysinternals/bb896653
Running this process explorer along firefox I noticed that initially all seem fine. Selecting View -> System Information I watched what happened while browsing. Initially, browsing causes some small spikes. Then something *very* strange happens (see attached pic):
Every 120" cpu load rises for approximately 60".
During the 60" cpu peak, firefox exhibits the freezing
firefox is ok during the rest (120-70=50") of the time only!
Note that this behaviour does not appear immediately at firefox start, but rather appears later on. I can not pinpoint the exact cause at this point. Once this 2 minute cycle starts, it does not stop until firefox exits!
Perhaps this should be submitted as a bug directly, but it felt like I had to gather some expert opinion here to help me and the devs on this.
EDIT: Updated info. From sysinternals, I can see that when the 60" peaks take place, cpu time is dominated by thread MOZCRT19.DLL (see 2nd screenshot). During that time, the following seem to be causing the peak:
mozsqlite3.dll!sqlite3_reset+0x2db1 mozsqlite3.dll!sqlite3_step+0xd9 xul.dll!?CanUseOpaqueSurface@Layer@layers@mozilla@@QAEHXZ+0x1d81 xul.dll!?CanUseOpaqueSurface@Layer@layers@mozilla@@QAEHXZ+0x1c58 xul.dll!?CanUseOpaqueSurface@Layer@layers@mozilla@@QAEHXZ+0x1bc6 xul.dll!NS_GetXPTCallStub_P+0xb59 xul.dll!?IsOriginalCharSkipped@gfxSkipCharsIterator@@QBEHPAH@Z+0x28f9a xul.dll!?GetEffectiveClipRect@Layer@layers@mozilla@@QAEPBUnsIntRect@@XZ+0x659 MOZCRT19.dll!_endthreadex+0x78 MOZCRT19.dll!_endthreadex+0x106 ntdll.dll!RtlInitializeExceptionChain+0x63 ntdll.dll!RtlInitializeExceptionChain+0x36