Performance problem since updating from 6.0-RELEASE to 6.0-STABLE last friday

[Pierre-Luc Drouin]

Pierre-Luc Drouin wrote:

> Nate Lawson wrote:
>
>> Pierre-Luc Drouin wrote:
>>
>>> Hajimu UMEMOTO wrote:
>>>
>>>>>>>>> On Mon, 14 Nov 2005 12:40:36 -0500
>>>>>>>>> Pierre-Luc Drouin <pldrouin at pldrouin.net> said:
>>>>>>>>
>>>>>>>>
>>>> pldrouin> Yep, smart battery is definately the problem. The 
>>>> performance of my pldrouin> laptop is back to normal when I remove 
>>>> the xfce4-battery-plugin. pldrouin> acpiconf -i loop reproduces the 
>>>> problem for me too. So it looks like pldrouin> there is something 
>>>> wrong in smart battery.
>>>>
>>>> The cmbat has similar issue on some laptops.  So, acpi_cmbat.c uses
>>>> cache for retrieval to reduce its influence, and its expiration
>>>> time is set by hw.acpi.battery.info_expire.
>>>> However, acpi_smbat.c doesn't use cache.  So, I made a patch.  Since I
>>>> don't have a laptop which has smbat, I cannot test it by myself.
>>>> Please test it and let me know the result.
>>>>  
>>>>
>>> The patch seams to do its job correctly, but it is still very 
>>> annoying to have the whole computer to freeze for 1 second when the 
>>> cache expires. What does make the whole system to freeze? Before the 
>>> code was changed in 6.0-stable, FreeBSD was able to read the battery 
>>> status without freezing my laptop... I have been running 3 OSes 
>>> (FreeBSD, Ubuntu and Win XP) on my laptop for a while and never 
>>> experienced that kind of problem with either Linux or Win XP. I 
>>> guess there is something wrong in the new code added after 6.0-release.
>>
>>
>>
>> If you have both smbat and cmbat, just disable smbat if you don't 
>> like it.  Add this to /boot/loader.conf:
>>
>> debug.acpi.disabled="smbat"
>>
>> The pause is related to a buggy or slow EC.  Caching the values 
>> happens to hide it.  Do you get pauses with smbat disabled (see above 
>> for how to do this)?  Can you still get battery status from cmbat?
>>
> Ok, there is new development. I realized by playing with 
> debug.acpi.disabled="smbat", debug.acpi.disabled="smbat cmbat" and 
> debug.acpi.disabled="cmbat", that my laptop battery is not a smbat, 
> but a cmbat. When I played with hw.acpi.battery.info_expire after to 
> have applied the patch for acpi_smbat.c, it was freezing less often 
> because that sysctl variable was shared by both cmbat and smbat. So I 
> can only get battery status from cmbat (disabling cmbat disables the 
> use of acpiconf -i loop). To get the status of my battery via cmbat 
> was working fine up to 6.0-RELEASE (included), but makes my laptop to 
> freeze since I upgraded to 6.0-stable with Nov 10th sources. What 
> change related to cmbat between 6.0-release and 6.0-stable could be 
> causing this?
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Has someone found how to fix this problem in -stable?

Thank you