> I guess the simplest way to do that without breaking with existing code is to change the 
> second number to a float. So a
> 
> WAIT SECONDS, 1
> 
> will still work, and you can then write
> 
> WAIT SECONDS, 0.01
> 
> to get a 10 ms wait. Would that work for you?

This would work fine in principle, but isn't implemented in the current MIDAS sequencer as we understand it.  (We tried!) Is your proposal to rewrite the sequencer 
to allow fractional waits?  Right now the code seems to store the start_time as a DWORD and uses atoi to parse the wait time, and uses ss_time (which seems only get
the time to the nearest second) to fetch the time.

> > This would work fine in principle, but isn't implemented in the current MIDAS sequencer as we understand it.  (We tried!) Is your proposal to rewrite the sequencer 
> > to allow fractional waits?  Right now the code seems to store the start_time as a DWORD and uses atoi to parse the wait time, and uses ss_time (which seems only get
> > the time to the nearest second) to fetch the time.
> 
> No it's not implemented, was just my idea. If it would work for you, I can implement it in the next couple of days.
> 
> Stefan

Yes, please!  Something like WAIT seconds, 0.01 would be perfect.

> While I will do it, i'm not sure if this is what you want. If I understand correctly, some process gets triggered and then writes some values to the ODB, then the sequencer 
> should continue. Putting a wait there is dangerous. Maybe your process always takes like 10-20 ms, so you put a wait of let's say 100ms, and things are fine with you. Your 
> script runs many days, but then once in a while your machine is on heavy load because someone starts a web browser, and your process takes 110ms, and you script crashes.
> 
> I would rather go following path: put a "done" flag in the ODB, which is the last one which gets set by your process. Then the sequencer does a 
> 
> WAIT ODBvalue, /path/value, =, 1
> 
> which will work always, independend of the delay of your process.
> 
> Stefan

Our use case is pretty simple and I don't think is affected by the scenario you envision.  We want to turn on a setting in our equipment, and turn it off again some 0.2 s later.  We don't need msec timing.  So something like:

ODBSET /somekey 1   # this will cause a front-end to flip a bit in our hardware     
WAIT seconds, 0.2
ODBSET /somekey 0   # this will cause a front-end to reset a bit in our hardware 

It is true that if the load is high there could be a little delay, and the time that the bit is set will not be 0.2 seconds, but on average it should work, 
and it should be good enough we think.

Yes, we could also check an ODB key to see that something is done, but we'd still need the ability to wait for time intervals less than 1 second, which
right now doesn't exist.

> Ok, I implemented the float second wait function. Internally it works in ms, so the maximum resolution is 0.001 s.
> 
> Best,
> Stefan

Thank you, we will test this soon and let you know if we see any issues (but we're not expecting any).

On February 13, 2007, gcc 4.1.2 was released.
I checked this version, and it compiles midas successfully,

GCC 3                    - OK
GCC 4.0                  - OK
GCC 4.1.0 and 4.1.1      - Bad
GCC 4.1.2                - OK
GCC 4.2                  - This is not released. Development version of GCC 4.2 is OK

#include <stdio.h>
  
int main(){
   int ii = 1;
   float* ff = (float*)&ii;
   *ff = 2;
   printf("%d\n", ii);
   return 0;
} 

warning: dereferencing type-punned pointer will break strict-aliasing rules

#include <stdio.h>

typedef struct xxx {int ii;} XX;
  
int main(){
   XX a;
   a.ii = 1;
   *(short*)&a.ii = 0;
   printf("%d\n", a.ii);
   return 0;
}

#include <stdio.h>
#include <string.h>
#include <malloc.h>
  
int main(){
   int *ii = (int*)malloc(8);
   ii[0] = 1;
   ii[1] = 2;
   float* ff = (float*)ii;
   ff[0] = 3;
   ff[1] = 4;
   printf("%d %d\n", ii[0], ii[1]);
   return 0;
}

mhist -s 140705 -p 140707 -e "HV".

diff --git a/utils/mhist.cxx b/utils/mhist.cxx
index 930de3b..10cc6ad 100755
--- a/utils/mhist.cxx
+++ b/utils/mhist.cxx
@@ -652,7 +652,6 @@ int main(int argc, char *argv[])
             else if (strncmp(argv[i], "-s", 2) == 0) {
                strcpy(start_name, argv[++i]);
                start_time = convert_time(argv[i]);
-               do_hst_file = true;
             } else if (strncmp(argv[i], "-p", 2) == 0)
                end_time = convert_time(argv[++i]);
             else if (strncmp(argv[i], "-t", 2) == 0)

Hi all

There is a bug report in the ROME repository which says bm_receive_event timeouts.

https://bitbucket.org/muegamma/rome3/issues/8/rome-with-midas-produces-timeout-after

Does anybody have any ideas what could causing the problem ?

Ryu

Hello,

We are going to implement a list of sequencer files to allow users to select one 
of them. The name of this file will be transferred to 
/ODB/Sequencer/State/Filename field of ODB. 

Is it possible to get a list of Sequencer files from MIDAS? Is there a jrpc 
command for this?

Thanks.

Best,
Ruslan

> If you load a file into the sequencer from the web interface, you get a list of all files in that directory. 
> This basically gives you a list of possible sequencer files. It's even more powerful, since you can 
> create subdirectories and thus group the sequencer files. Attached an example from our 
> experiment.
> 
> Stefan


Dear Stefan,

Thank you for the explanation.

Ruslan

> If you load a file into the sequencer from the web interface, you get a list of all files in that directory. 
> This basically gives you a list of possible sequencer files. It's even more powerful, since you can 
> create subdirectories and thus group the sequencer files. Attached an example from our 
> experiment.
> 
> Stefan

Dear Stefan,

Could you please answer one more question:

We have a custom webpage and trying to get list of files from the custom webpage and need jrpc command to show it 
in custom page. Is there a jrpc command to get this file list?

Thanks,

Hello,

I have a question about length of the name of ODB key.
Is it possible to create an ODB key containing more than 32 characters?

Thanks.
Ruslan

Hello,

I have a few questions about time information:
1. Is it possible to get "Running time" using, for example, jsonrpc? (please see 
the attached file)
2. Is it possible to configure "Start time" and "Stop time" with time zone? For 
example when I start a new run, value of "Start time" key is automatically changed 
to "Fri Aug 21 12:38:36 2020" without time zone. 

Thank you.

Thank you, Stefan

Ruslan 



> > 1. Is it possible to get "Running time" using, for example, jsonrpc? (please see 
> > the attached file)
> 
> You have in the ODB "/Runinfo/Start time binary" which is measured in seconds since 
> 1970. By subtracting this from the current time, you get the running time.
> 
> > 2. Is it possible to configure "Start time" and "Stop time" with time zone? For 
> > example when I start a new run, value of "Start time" key is automatically changed 
> > to "Fri Aug 21 12:38:36 2020" without time zone. 
> 
> "Start time binary" and "Stop time binary" are in seconds since the 1970 in UTC, so no 
> time zone involved there. The ASCII versions of the start/stop time are derived from 
> the binary time using the server's local time zone. If you want to display them in a 
> different time zone, you have to create a custom page and convert it to another time 
> zone using JavaScript like
> 
> var d = new Date(start_time_binary);
> 
> Stefan

 Thank you, Stefan

 >>>var d = new Date(start_time_binary);
 I need time zone because new Date() gives time related to time zone of my PC. 
 
 Ruslan 
> 
> 
> 
> > > 1. Is it possible to get "Running time" using, for example, jsonrpc? (please see 
> > > the attached file)
> > 
> > You have in the ODB "/Runinfo/Start time binary" which is measured in seconds since 
> > 1970. By subtracting this from the current time, you get the running time.
> > 
> > > 2. Is it possible to configure "Start time" and "Stop time" with time zone? For 
> > > example when I start a new run, value of "Start time" key is automatically changed 
> > > to "Fri Aug 21 12:38:36 2020" without time zone. 
> > 
> > "Start time binary" and "Stop time binary" are in seconds since the 1970 in UTC, so no 
> > time zone involved there. The ASCII versions of the start/stop time are derived from 
> > the binary time using the server's local time zone. If you want to display them in a 
> > different time zone, you have to create a custom page and convert it to another time 
> > zone using JavaScript like
> > 
> > var d = new Date(start_time_binary);
> > 
> > Stefan

Hello,

I got an error after start of run and it would be good to show this error (or 
errors) in UI that I am developing. I see this error in the Transition 
directory (please see the attached file). Is it possible to read the status 
message and error messages from the Transition directory using jsonrpc? If yes, 
could you please explain me how to do this.

Thank you.
Ruslan  

> The information you want is in the ODB:
> * "/System/Transition/status" is the overall integer status code.
> * "/System/Transition/error" is the overall error message string.
> 
> There is also per-client status information in the ODB:
> * "/System/Transition/Clients/<client_name>/status"
> * "/System/Transition/Clients/<client_name>/error"


Thank you so much, Ben!

> > > The information you want is in the ODB:
> > > * "/System/Transition/status" is the overall integer status code.
> > > * "/System/Transition/error" is the overall error message string.
> > > 
> > > There is also per-client status information in the ODB:
> > > * "/System/Transition/Clients/<client_name>/status"
> > > * "/System/Transition/Clients/<client_name>/error"
> 
> You can also use web page .../resources/transition.html as an example of how
> to read transition (and other) data from ODB into your own web page. example.html
> may also be helpful.
> 
> K.O.

Thank you Konstantin!

Ruslan