Re: Hang running fs_mark

[Ric Wheeler <rwheeler@redhat.com>]

Chris Mason wrote:
> On Thu, 2008-09-25 at 17:10 -0400, Ric Wheeler wrote:
>
>   
>>> Ok, I have that fs_mark test running here.  How far did yours get before
>>> it stopped?
>>>
>>> -chris
>>>
>>>   
>>>       
>> I had gone (in heavy fsync mode) up to about 8 million files on a 1TB 
>> s-ata disk:
>>
>>     17      8064000        20480          5.6         15301404
>>
>> This is the new (no system sync() call) Chris special fs_mark.  The rate 
>> had been quite reasonable, starting out at around 160 20k files/sec, 
>> went under 100 files/sec at around 3 million files and then fell under 
>> 50 files/sec at around 7.5 million before hitting this really low speed 
>> at just under 8 million.
>>
>> Maybe it really was not hung, just extremely slow...
>>
>>     
>
> I'm at 6.9 million files so far on a 500GB disk, and not surprisingly, I
> get  155 files/sec ;)  My hope is that we're spinning around due to bad
> accounting on the reserved extents, and that Yan's latest patch set will
> fix it.
>
> -chris
I can update & restart my test as well. It is an odd box (8 CPUs, only 
1GB of DRAM and a single large 1TB s-ata drive). Hopefully useful in 
testing out edge conditions ;-)

ric