Do you know the reason?

[James Zheng]

Thanks. I have used latest version. but it can't work well now. and i use 
the http://ftp.belnet.be/linux/SuSe/people/mason/utils/ test the system, it 
works well.

uname  -r
2.6.15-1.2054_FC5smp


wget http://ftp.belnet.be/linux/SuSe/people/mason/utils/*
# gcc -Wall -laio -lpthread -o aio-stress aio-stress.c
#./aio-stress -s 300 -m -S -l -L -t 10 file1

dropping thread count to the number of contexts 1
file size 300MB, record size 64KB, depth 64, ios per iteration 8
max io_submit 8, buffer alignment set to 4KB
threads 1 files 1 contexts 1 context offset 2MB verification off
Running single thread version
latency min 1.95 avg 14.38 max 234.36
         598 < 100 2 < 250 0 < 500 0 < 1000 0 < 5000 0 < 10000
completion latency min 0.17 avg 32.09 max 326.71
         4464 < 100 232 < 250 40 < 500 0 < 1000 0 < 5000 0 < 10000
write on file1 (33.59 MB/s) 300.00 MB in 8.93s
thread 0 write totals (32.32 MB/s) 300.00 MB in 9.28s
latency min 5.83 avg 11.49 max 81.89
         600 < 100 0 < 250 0 < 500 0 < 1000 0 < 5000 0 < 10000
completion latency min 0.17 avg 43.18 max 296.57
         4640 < 100 144 < 250 16 < 500 0 < 1000 0 < 5000 0 < 10000
read on file1 (40.84 MB/s) 300.00 MB in 7.34s
thread 0 read totals (40.77 MB/s) 300.00 MB in 7.36s
latency min 0.77 avg 11.11 max 369.76
         595 < 100 4 < 250 1 < 500 0 < 1000 0 < 5000 0 < 10000
completion latency min 0.61 avg 28.28 max 424.04
         4570 < 100 222 < 250 8 < 500 0 < 1000 0 < 5000 0 < 10000
random write on file1 (42.88 MB/s) 300.00 MB in 7.00s
thread 0 random write totals (39.38 MB/s) 300.00 MB in 7.62s
latency min 2.27 avg 15.44 max 188.48
         597 < 100 3 < 250 0 < 500 0 < 1000 0 < 5000 0 < 10000
completion latency min 0.16 avg 57.28 max 331.30
         3954 < 100 822 < 250 24 < 500 0 < 1000 0 < 5000 0 < 10000
random read on file1 (30.87 MB/s) 300.00 MB in 9.72s
thread 0 random read totals (30.83 MB/s) 300.00 MB in 9.73s


----- Original Message ----- 
From: "Jay Buffington" <jaybuffington at gmail.com>
To: <mogilefs at lists.danga.com>
Sent: Tuesday, July 18, 2006 6:46 AM
Subject: Re: Do you know the reason?


> You could try IO::AIO, but you'll most likely get the same make test 
> failures.
>
> My guess is this is a threading bug in your OS.  Old RedHat versions
> have really buggie thread support (You're using Fedora?).  I'm not
> sure what the latest is like.
>
> You probably need to upgrade your OS.
>
> Jay
>
> On 7/17/06, James Zheng <jameswork66 at gmail.com> wrote:
>> Would you get some suggestion for this again?
>>
>> Thanks.