 01 Aug 2006, Konstantin Olchanski, Bug Fix, User-tunable buffer sizes
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By default, MIDAS creates shared memory event data buffers of default size
EVENT_BUFFER_SIZE defined in midas.h and until now making of large data buffers
for high data rate or large event size experiments was complicated.
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07 Aug 2006, Konstantin Olchanski, Bug Fix, Refactoring and rewrite of event buffer code
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In close cooperation with Stefan, I refactored and rewrote the MIDAS event
buffering code (bm_send_event, bm_flush_cache, bm_receive_event and bm_push_event).
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07 Aug 2006, Konstantin Olchanski, Bug Fix, Fix crash in mfe.c
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Some time ago, I accidentally introduced a bug in mfe.c- if there is data
congestion in the system, mfe.c can exit with the error "bm_flush_cache(ASYNC)
error 209" because it did not expect the valid return value BM_ASYNC_RETURN
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 09 Aug 2006, Konstantin Olchanski, Bug Fix, Refactoring and rewrite of event buffer code
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> In close cooperation with Stefan, I refactored and rewrote the MIDAS event
> buffering code (bm_send_event, bm_flush_cache, bm_receive_event and bm_push_event).
>
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17 Aug 2006, Konstantin Olchanski, Bug Report, "double" values are truncated
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The mhttpd ODB displays and mhist truncate values of "float" and "double"
floating point variables to 6 digits. In reality, "float" has 7 significant
digits and "double" has 16. I recommend that db_sprintf() in odb.c be changed to
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19 Aug 2006, Konstantin Olchanski, Bug Fix, fixes for minor mhttpd problems
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I commited fix for minor mhttpd problems (rev 3314):
- for a newly created experiment, the "history" button gave the error [history
panel "" does not exist] (new problem introduced in revision 3150)
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26 Aug 2006, Konstantin Olchanski, Bug Fix, fixes for minor mhttpd problems
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> I commited fix for minor mhttpd problems (rev 3314):
> - elog attachments did not work for file names containing character plus (+)
> (attachement URLs should be properly encoded to escape special CGI characters)
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04 Sep 2006, Konstantin Olchanski, Bug Fix, Fix MIDAS on MacOS 10.4.7
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I commited minor fixes for building MIDAS on MacOS 10.4.7:
1) there is no linux/unistd.h
2) gcc 4.0.0 does not like "struct { ... } var;" although "struct Foo { ... } var;" is fine
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05 Sep 2006, Konstantin Olchanski, Forum, Forums moved from dasdevpc.triumf.ca to ladd00.triumf.ca
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For the record, the MIDAS (& co) forums have been physically moved from
dasdevpc.triumf.ca to our new server machine ladd00.triumf.ca. This change
should be transparent to all users, but if anything stops working, please let me
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23 Sep 2006, Konstantin Olchanski, Bug Report, mhttpd elog corruption via double-edit
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Aparently the mhttpd elog will corrupt the elog files if two (or more?) elog entries are being edited at the
same time. K.O. |
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23 Sep 2006, Konstantin Olchanski, Bug Fix, commit latest ccusb.c CAMAC-USB driver
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> I commited the latest driver for the Wiener CCUSB USB-CAMAC driver. It
> implements all functions from mcstd.h and has been tested to be plug-compatible
> with at least one of our CAMAC frontends. K.O.
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27 Sep 2006, Konstantin Olchanski, Bug Report, mhttpd elog corruption via double-edit
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[quote="Stefan Ritt"][Quote="K.O.]Aparently the mhttpd elog will corrupt the
elog files if two (or more\?) elog entries are being edited at the same time.
K.O.[/quote]
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27 Sep 2006, Konstantin Olchanski, Suggestion, Increase of maximum event size
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> The current event size in midas is limited to 512k (MAX_EVENT_SIZE in midas.h)
Yes, 512 kBytes is rather small. For the T2K prototype TPC DAQ, I built and ran
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22 Jan 2007, Konstantin Olchanski, Forum, Midas on a x86_64
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> has anyone managed to get midas to work on a x86_64 processor. I followed the
> instructions for the 64-bit opteron but i am getting runtime error when trying
> the examples.
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05 Feb 2007, Konstantin Olchanski, Bug Report, wrong version in include/midas.h?
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The present .../include/midas.h contains
[alpha@laddvme06 ~/online]$ grep 1.9.5 /home/alpha/packages/midas/include/*
/home/alpha/packages/midas/include/midas.h:#define MIDAS_VERSION "1.9.5"
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11 Feb 2007, Konstantin Olchanski, Info, svn and "make indent" trashed my svn checkout tree...
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Fuming, fuming, fuming.
The combination of "make indent" and "svn update" completely trashed my work copy of midas. Half of
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17 Feb 2007, Konstantin Olchanski, Bug Report, segmentation violation of analyzer on a x86_64
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> Yes right, Problem of a segmentation violation is solved with this patch. Now it works
> fine on x86_64.
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23 Feb 2007, Konstantin Olchanski, Info, RFC- support for writing to removable hard disk storage
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At triumf, we are developing a system to use removable hard drives to store data collected by midas
daq stations. The basic idea is to replace storage on 300 GB DLT tapes with storage on removable
esata, usb2 or firewire 750 GB hard drives.
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23 Feb 2007, Konstantin Olchanski, Info, RFC- history system improvements
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While running the ALPHA experiment at CERN, we stressed and broke the MIDAS history system. We
generated about 0.5 GB of history data per day, and this killed the performance of the history plot
system in mhttpd - we had to wait for *minutes* to look at any plots of any variables.
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06 Mar 2007, Konstantin Olchanski, Info, commited mhttpd fixes & improvements
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I commited the mhttpd fixes and improvements to the history code accumulated while running the ALPHA
experiment at CERN:
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