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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | weird behaviour of SNL test program running on Soft IOC on LINUX |
| From: | "Oleg Makarov" <[email protected]> |
| To: | "EPICS tech-talk" <[email protected]> |
| Cc: | [email protected], "Stepanov, Sergey" <[email protected]> |
| Date: | Mon, 16 Mar 2009 11:03:58 -0500 |
|
A small SNL test program strangely misbehaves when
it being run on Soft IOC on LINUX.
Under VxWorks this SNL test program program behaves
as expected.
%%#include <string.h> string str_rsp; assign str_rsp to "{dev}StrRsp"; string str_cmd; assign str_cmd to "{dev}StrCmd";
ss main { state tst { when(pvConnectCount() == pvChannelCount()) { strcpy (str_cmd, "I522"); pvPut(str_cmd); epicsThreadSleep(1.0); pvGet (str_rsp); epicsThreadSleep(1.0); printf ("str_rsp = %s \n", str_rsp); strcpy (str_cmd, "I521"); pvPut(str_cmd); epicsThreadSleep(1.0); } state tst } } This program interacts with device using two EPICS PV strings:
1) writes a command "I522" and sleeps one second
2) reads a response and sleeps one second
3) prints a response at IOC console
4) writes a command "I521" and sleeps one second
The program repeats this sequence periodically.
being run under the VxWorks OS program behaves exactly as expected:
23b:ioc2> seq &test, "name=my_test, mtr=23b:GO:mom:" SEQ Version 2.0.12: Mon Feb 9 13:16:21 2009 Spawning state program "test", thread 0x1ee970f0: "my_test" value = 518615280 = 0x1ee970f0 23b:ioc2> str_rsp = 378.88 str_rsp = 378.88 str_rsp = 378.88 str_rsp = 378.88 str_rsp = 378.88 str_rsp = 378.88 str_rsp = 378.88
camonitor connected to these two PV strings shows timing as expected:
gmca@mar3:~ 6> camonitor 23b:GO:mom:StrCmd 23b:GO:mom:StrRsp 23b:GO:mom:StrCmd 2009-03-13 18:12:19.025831 I522 23b:GO:mom:StrRsp 2009-03-13 18:12:19.042497 378.88 23b:GO:mom:StrCmd 2009-03-13 18:12:21.025831 I521 23b:GO:mom:StrRsp 2009-03-13 18:12:21.025831 100 23b:GO:mom:StrCmd 2009-03-13 18:12:22.025831 I522 23b:GO:mom:StrRsp 2009-03-13 18:12:22.025831 378.88 23b:GO:mom:StrCmd 2009-03-13 18:12:24.025831 I521 23b:GO:mom:StrRsp 2009-03-13 18:12:24.025831 100 23b:GO:mom:StrCmd 2009-03-13 18:12:25.025830 I522 23b:GO:mom:StrRsp 2009-03-13 18:12:25.025830 378.88 23b:GO:mom:StrCmd 2009-03-13 18:12:27.025830 I521 23b:GO:mom:StrRsp 2009-03-13 18:12:27.025830 100 being run under Soft IOC on LINUX strange things happen - on the concole it
prints a string corresponding to the responce on the second command and
sometimes it prints a string with the first command "I522":
str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = 100 str_rsp = I522 str_rsp = 100 str_rsp = 100
camonitor connected to these two PV strings also shows a strange timing - two commands get posted without time delays: 23b:GO:mom:StrCmd 2009-03-13 18:27:02.628072 I522 23b:GO:mom:StrCmd 2009-03-13 18:27:04.978072 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:06.628072 I522 23b:GO:mom:StrRsp 2009-03-13 18:27:06.628072 378.88 23b:GO:mom:StrCmd 2009-03-13 18:27:08.628072 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:08.628072 I522 23b:GO:mom:StrRsp 2009-03-13 18:27:08.628072 100 23b:GO:mom:StrCmd 2009-03-13 18:27:11.644738 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:11.644738 I522 23b:GO:mom:StrCmd 2009-03-13 18:27:14.644738 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:14.644738 I522 23b:GO:mom:StrCmd 2009-03-13 18:27:17.644738 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:17.644738 I522 23b:GO:mom:StrCmd 2009-03-13 18:27:20.644738 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:20.644738 I522 23b:GO:mom:StrCmd 2009-03-13 18:27:23.661404 I521 23b:GO:mom:StrCmd 2009-03-13 18:27:23.661404 I522
Any ideas on how to correct this problem with SNL
test program running on Soft IOC under LINUX OS?
Regards,
Oleg A. Makarov,
Beamline Instrumentation Scientist Argonne National Laboratory 9700 South Cass Avenue Argonne, IL 60439-4861 Phone 630 252 0668
Fax 630 252 0667 |