On Fri, 26 May 2006 Abu M.Muttalib wrote :
>Hi Tayseer,
>
>Thanks for your reply.
>
>The log shows new PID for different thread, but threads/process marked in
>red color have different PPID, why this is so?
This is beacuse if you notice
The process with PPID = 1 has the lowest PID number
What does this imply?
- It states that this a process which is say ... started by a shell .. and this is the process which starts other threads ...
Infact if you see the output of PS correctly ....
process with PID = 872 spawns process with PID = 874 and this process then starts spawning the other threads ...
Please CMIIW ....
>
>My main question remained unanswered: Are the processes with the same name
>represent threads? Is there a direct correlation between no of threads
>created and no shown in the output of ps?
Yes there is ... I hope my above explanation also explains this query
- Rohit
>
>Regards,
>Abu.
>Abu M. Muttalib
>Associate,
>Aftek Infosys Ltd.,
>Pune, India
>Office: 91-20-25449260-65 X-254
>Email: abum@xxxxxxxxx
>
>
>
> -----Original Message-----
> From: MHD.Tayseer Alquoatli [mailto:idoit.ief@xxxxxxxxx]
> Sent: Friday, May 26, 2006 12:42 PM
> To: Abu M. Muttalib
> Cc: kernelnewbies@xxxxxxxxxxxx
> Subject: Re: PS output for threads
>
>
>
>
>
> On 5/26/06, Abu M. Muttalib <abum@xxxxxxxxx> wrote:
> Hi Tayseer,
>
> Hi Abu
> http://en.wikipedia.org/wiki/Top_posting
>
>
>
> I don't agree with that. For any thread there will be a new task struct,
>and hence there will be new process ID and all.
>
> This is true .. but this is now what i've said
> for each new threads there will be a new task, new process id "pid", all
>threads have the same parent id "ppid" and the same process group id "pgid"
>and this is what is shown in your log
> "Linux doesn't differentiate between processes and threads cause they all
>are tasks" i mean that both processes and threads will be presented by a
>task struct
> CMIIW please
>
> thanks
>
>
> for example I have the following log:
>
> PID USER STATUS RSS PPID %CPU %MEM COMMAND
> 942 yoku R 828 871 1.9 5.7 busybox
> 834 yoku S 2620 1 0.0 18.3 hopper
> 891 yoku S 2620 890 0.0 18.3 hopper
> 890 yoku S 2620 834 0.0 18.3 hopper
> 871 yoku S 1340 1 0.0 9.3 sh
> 875 yoku S 1336 874 0.0 9.3 Angelia
> 872 yoku S 1336 1 0.0 9.3 Angelia
> 887 yoku S 1336 874 0.0 9.3 Angelia
> 888 yoku S < 1336 874 0.0 9.3 Angelia
> 876 yoku S 1336 874 0.0 9.3 Angelia
> 884 yoku S 1336 874 0.0 9.3 Angelia
> 885 yoku S 1336 874 0.0 9.3 Angelia
> 874 yoku S 1336 872 0.0 9.3 Angelia
> 883 yoku S 1336 874 0.0 9.3 Angelia
> 886 yoku S 1336 874 0.0 9.3 Angelia
> 766 yoku S 1092 1 0.0 7.6 SIMSCRIPT1
> 767 yoku S 1092 1 0.0 7.6 SIMSCRIPT2
> 836 yoku S 800 1 0.0 5.5 btsdpd
> 811 yoku S 712 1 0.0 4.9 btsrv
>
> Regards,
> Abu.
> Abu M. Muttalib
> Associate,
> Aftek Infosys Ltd.,
> Pune, India
> Office: 91-20-25449260-65 X-254
> Email: abum@xxxxxxxxx
>
>
>
> -----Original Message-----
> From: MHD.Tayseer Alquoatli [mailto:idoit.ief@xxxxxxxxx]
> Sent: Friday, May 26, 2006 11:58 AM
> To: Abu M. Muttalib
> Cc: kernelnewbies@xxxxxxxxxxxx
> Subject: Re: PS output for threads
>
>
>
>
>
> On 5/25/06, Abu M. Muttalib <abum@xxxxxxxxx> wrote:
> Hi,
>
> I have an application wherein I have say 10 threads which are created
> unconditionally and run a "while(1);".
>
> Will they be shown in the output of ps -A as 10 different processes?
>
> Hi
> cause Linux don't differentiate between process and a threads .. they
>are all tasks
> all your threads have the same parent process id "ppid" and share the
>same process group id "pgid"
> hope this helps
>
>
> --
> MHD.Tayseer
>
>
>
> --
> MHD.Tayseer
