Re: [HACKERS] Regarding Postgres Dynamic Shared Memory (DSA)

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От Mahendranath Gurram
Тема Re: [HACKERS] Regarding Postgres Dynamic Shared Memory (DSA)
Дата
Msg-id 15cc5a7d6ac.12499fba61726.4983168038492706182@zohocorp.com
обсуждение исходный текст
Ответ на Re: [HACKERS] Regarding Postgres Dynamic Shared Memory (DSA)  (Dilip Kumar <dilipbalaut@gmail.com>)
Ответы Re: [HACKERS] Regarding Postgres Dynamic Shared Memory (DSA)  (Dilip Kumar <dilipbalaut@gmail.com>)
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Hi Dilip,

Thanks for your response.

The steps you followed are right. May i know in which OS you tried? Mac/Linux.

Because,  In Mac, it is working fine. just as expected. But the problem(segmentation fault) i'm facing is with linux systems.

Thanks & Best Regards,
-Mahi
Teamwork divides the task and multiplies the success.




---- On Tue, 20 Jun 2017 16:47:24 +0530 Dilip Kumar <dilipbalaut@gmail.com> wrote ----

On Tue, Jun 20, 2017 at 3:16 PM, Mahendranath Gurram
> Hi Thomas,
>
> Any update on this?
>
> Please let me know how can i proceed further.
>
> Thanks & Best Regards,
> -Mahi

I did not see the code but just tested with your code.

1) Added test_dsa to shared preload library.
2) CREATE EXTENSION test_dsa;
3) executed test_dsa_data_access(1)

postgres=# select test_dsa_data_access(1);
2017-06-20 16:49:39.483 IST [9738] LOG: Data read is ==> Hello world
2017-06-20 16:49:39.483 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world0
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world1
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world2
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world3
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world4
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world5
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world6
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world7
2017-06-20 16:49:39.484 IST [9907] LOG: BackgroundWorker Shared
LinkedList Data read is ==> Hello world8
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world0
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world1
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world2
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world3
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world4
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world5
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world6
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world7
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world8
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world9
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world10
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world11
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world12
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world13
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world14
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world15
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world16
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world17
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world18
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG: LinkedList Node Data read is
==> Hello world19
2017-06-20 16:49:39.485 IST [9738] STATEMENT: select test_dsa_data_access(1);
test_dsa_data_access
----------------------
0


I don't see any segmentation fault. Is there some other step which I
have missed.

--
Regards,
Dilip Kumar


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