Cm msg deadlock note: Difference between revisions
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(Created page with "= Note on race condition and deadlock between ODB lock and SYSMSG lock in cm_msg() = * https://midas.triumf.ca/elog/Midas/737") |
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= Note on race condition and deadlock between ODB lock and SYSMSG lock in cm_msg() = | = Note on race condition and deadlock between ODB lock and SYSMSG lock in cm_msg() = | ||
* https://midas.triumf.ca/elog/Midas/737 | In December 2010/January/February 2011 I identified and fixed a number of race conditions and deadlocks that were severely affecting the T2K/ND280 experiment in Japan. Removal of these problems was an important improvement to MIDAS. To remember lessons learned and to avoid having these problems come back, I document the relevant information in this wiki. | ||
The whole blow-by-blow account can be read on the MIDAS forum: | |||
* https://midas.triumf.ca/elog/Midas/734 - start of thread | |||
* https://midas.triumf.ca/elog/Midas/737 - deadlock involving cm_msg() | |||
* https://midas.triumf.ca/elog/Midas/741 - cm_msg() deadlock through cm_watchdog() | |||
Revision as of 09:35, 6 August 2013
Note on race condition and deadlock between ODB lock and SYSMSG lock in cm_msg()
In December 2010/January/February 2011 I identified and fixed a number of race conditions and deadlocks that were severely affecting the T2K/ND280 experiment in Japan. Removal of these problems was an important improvement to MIDAS. To remember lessons learned and to avoid having these problems come back, I document the relevant information in this wiki.
The whole blow-by-blow account can be read on the MIDAS forum:
- https://midas.triumf.ca/elog/Midas/734 - start of thread
- https://midas.triumf.ca/elog/Midas/737 - deadlock involving cm_msg()
- https://midas.triumf.ca/elog/Midas/741 - cm_msg() deadlock through cm_watchdog()