 05 Sep 2024, Ben Smith, Forum, Python frontend rate limitations?
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> What limits the rate that poll_func is called in a python frontend?
First the general advice: if you reduce the "period" of your equipment, then your function will get called more frequently. You can set it to 0 and we'll |
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05 Sep 2024, Jack Carlton, Forum, Python frontend rate limitations?
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Thank you, this was very helpful.
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05 Sep 2024, Stefan Ritt, Forum, Python frontend rate limitations?
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> First the general advice: if you reduce the "period" of your equipment, then your function will get called more frequently.
> You can set it to 0 and we'll call it as often as possible. You can set this in the ODB at "/Equipment/Python Data Simulator/Common/Period"
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06 Sep 2024, Jack Carlton, Forum, Python frontend rate limitations?
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Thanks for the responses, they were very helpful.
>First the general advice: if you reduce the "period" of your equipment, then your function will get called more frequently. You can set it to 0 and we'll |
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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> I'm trying to get a sense of the rate limitations of a python frontend.
1) python is single-threaded, for ultimate performance, a MIDAS frontend (or any DAQ
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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>
> poll(INT count) {
> for (i=0 ; i<count ; i++)
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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> > I'm trying to get a sense of the rate limitations of a python frontend.
forgot one more:
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11 Sep 2024, Konstantin Olchanski, Forum, "Safe" abort of sequencer scripts
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> We often use the MIDAS sequencer to temporarily control detector settings, such as:
>
> * <change some setting>
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27 Sep 2024, Ben Smith, Forum, Python frontend rate limitations?
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> in your case the limitation is likely that you're sending 1.25MB per event and we have a lot of data marshalling to do between the python and C++ layer.
>
> I'll add it to my to-do list to investigate improving the performance of medium-to-large events in the python code.
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 13 Oct 2004, Konstantin Olchanski, Bug Report, db_paste: found string exceeding MAX_STRING_LENGTH
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I am updating TWIST to the latest MIDAS and when I load a saved .odb file, I get
these messages. Their text ought to say where and what strings it does not like.
K.O.
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13 Oct 2004, Stefan Ritt, Bug Report, db_paste: found string exceeding MAX_STRING_LENGTH
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Can you attach
/twist/data_onl/current/run17548.odb
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13 Oct 2004, Konstantin Olchanski, Bug Report, silly odbedit "rename Display xxx/yyy"
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odbedit command "rename Display xxx/yyy" creates a key named "xxx/yyy" (yes,
with a slash in the name) and this key cannot be deleted or renamed...
K.O. |
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13 Oct 2004, Stefan Ritt, Bug Report, silly odbedit "rename Display xxx/yyy"
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> odbedit command "rename Display xxx/yyy" creates a key named "xxx/yyy" (yes,
> with a slash in the name) and this key cannot be deleted or renamed...
> K.O.
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13 Oct 2004, Konstantin Olchanski, Bug Report, TWIST upgrade bombed...
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The upgrade of TWIST to the latest midas has bombed- we see mevb and mlogger
crashes during shared memory data buffer accesses. I am looking into it and I
will add information as I figure things out. K.O. |
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13 Oct 2004, Pierre-Andre Amaudruz, Bug Report, TWIST upgrade bombed...
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> The upgrade of TWIST to the latest midas has bombed- we see mevb and mlogger
> crashes during shared memory data buffer accesses. I am looking into it and I
> will add information as I figure things out. K.O.
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13 Oct 2004, Konstantin Olchanski, Bug Report, TWIST upgrade bombed...
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> The upgrade of TWIST to the latest midas has bombed- we see mevb and mlogger
> crashes during shared memory data buffer accesses. I am looking into it and I
> will add information as I figure things out. K.O.
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13 Oct 2004, Konstantin Olchanski, Bug Report, TWIST upgrade bombed...
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> > The upgrade of TWIST to the latest midas has bombed- we see mevb and mlogger
> > crashes during shared memory data buffer accesses. I am looking into it and I
> > will add information as I figure things out. K.O.
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14 Oct 2004, Stefan Ritt, Bug Report, TWIST upgrade bombed...
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Agree.
Once you did the modification, please check following situation: Create a fresh
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14 Oct 2004, Konstantin Olchanski, Bug Report, lazylogger complains about zero-size files
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With latest midas, I see this:
Thu Oct 14 19:31:17 2004 [Lazy_Tape] [lazylogger.c:1717:Lazy] lazy_file_exists
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14 Oct 2004, Konstantin Olchanski, Bug Report, TWIST upgrade bombed...
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> The upgrade of TWIST to the latest midas has bombed- we see mevb and mlogger
> crashes during shared memory data buffer accesses. I am looking into it and I
> will add information as I figure things out. K.O.
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