Hi there,
I'm trying to understand the documented options for debugging a restarted DMTCP process. I've been testing a few different environment variables trying to get the dmtcp_restart process to pause for 15 seconds like it is suppose to, so that I can attach to it with gdb. There are various options in the documentation, environment variables like: DMTCP_RESTART_PAUSE DMTCP_RESTART_PAUSE2 DMTCP_GDB_ATTACH_ON_RESTART I am currently locked into using DMTCP version 2.3.1 at the present time. My program was compiled using gcc 6.4.0. I am running under CentOS release 6.8 Final, kernal 2.6.32-642.4.2.el6.x86_64 #1 SMP. Have noted that the documentation states that prior to version 2.4 of DMTCP, the environment variable to use is named MTCP_RESTART_PAUSE. I have tried setting MTCP_RESTART_PAUSE prior to the dmtcp_launch command, and prior to both dmtcp_launch and dmtcp_restart commands with no luck. I am able to use gdb to attach to the process (more easily from a separate terminal because of the standard output being produced from my process in the dmtcp_restart process terminal) but since there is no pause, gdb doesn't attach until later in the process after the restart, all based on how quickly I can get the gdb attach commmand typed in and entered. Not really a reliable way to go :) In any event, if there are known issues with regard to getting the restart process to pause in version DMTCP 2.3.1, then that would explain it, if however I am doing something wrong, then any help would be appreciated. My normal series of run commands go like this (just like the DMTCP documentation) MTCP_RESTART_PAUSE=1 dmtcp_launch --disable-alloc-plugin --no-coordinator --port 0 program.exe < input.dat dmtcp_restart --port 0 --port-file dmtcpportfile checkpoint.dmtcp < input.int & Do you think any of the command line options are causing any issues, like my lack of using the coordinator? Also, my program always reads a file from standard input even during a restart. Thanks, Rick ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Dmtcp-forum mailing list Dmtcp-forum@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dmtcp-forum
