What is this error telling me?

Jim Wilkins
Jim Wilkins
Joined: 1 Jun 05
Posts: 33
Credit: 28,426,884
RAC: 0
Topic 192358

I got a bunch of these errors just a few minutes ago. I have never seen this before . Is it a problem on my end?

Thanks,
Jim

Thu Jan 25 14:12:13 2007|Einstein@Home|Resuming task h1_0380.0_S5R1__47_S5RIa_0 using einstein_S5RI version 428
Thu Jan 25 14:12:13 2007|SETI@home Beta Test|Pausing task 06no06aa.19371.91308.10.4.148_2 (left in memory)
Thu Jan 25 14:12:13 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:12:13 2007|Einstein@Home|Unrecoverable error for result h1_0380.0_S5R1__17121_S5R1a_2 (Couldn't start or resume: -146)
Thu Jan 25 14:12:13 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:12:13 2007||Rescheduling CPU: start failed
Thu Jan 25 14:12:13 2007|Climateprediction.net Beta|Pausing task hadcm3transb1_0d2a_50356104_0 (left in memory)
Thu Jan 25 14:12:13 2007|SETI@home|Resuming task 06no03aa.23964.27264.678406.3.151_2 using setiathome_enhanced version 513
Thu Jan 25 14:12:13 2007|Einstein@Home|Unexpected state 7 for task h1_0380.0_S5R1__17121_S5R1a_2
Thu Jan 25 14:12:14 2007|Einstein@Home|Computation for task h1_0380.0_S5R1__17121_S5R1a_2 finished
Thu Jan 25 14:13:15 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:13:15 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:13:15 2007|Einstein@Home|Requesting 4427 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:13:25 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:13:27 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:13:27 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:13:27 2007|Einstein@Home|Unrecoverable error for result h1_0380.0_S5R1__18_S5RIa_1 (Couldn't start or resume: -146)
Thu Jan 25 14:13:27 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:13:27 2007||Rescheduling CPU: start failed
Thu Jan 25 14:13:27 2007|Einstein@Home|Unexpected state 7 for task h1_0380.0_S5R1__18_S5RIa_1
Thu Jan 25 14:13:28 2007|Einstein@Home|Computation for task h1_0380.0_S5R1__18_S5RIa_1 finished
Thu Jan 25 14:14:30 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:14:30 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:14:30 2007|Einstein@Home|Requesting 5799 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:14:35 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:14:37 2007|Einstein@Home|Started download of file grid_0370_h_T02_S5RI.dat
Thu Jan 25 14:14:40 2007|Einstein@Home|Finished download of file grid_0370_h_T02_S5RI.dat
Thu Jan 25 14:14:40 2007|Einstein@Home|Throughput 31872 bytes/sec
Thu Jan 25 14:14:41 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:14:41 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:14:41 2007|Einstein@Home|Unrecoverable error for result h1_0360.5_S5R1__240_S5RIa_1 (Couldn't start or resume: -146)
Thu Jan 25 14:14:41 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:14:41 2007||Rescheduling CPU: start failed
Thu Jan 25 14:14:41 2007|Einstein@Home|Unexpected state 7 for task h1_0360.5_S5R1__240_S5RIa_1
Thu Jan 25 14:14:42 2007|Einstein@Home|Computation for task h1_0360.5_S5R1__240_S5RIa_1 finished
Thu Jan 25 14:15:45 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:15:45 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:15:45 2007|Einstein@Home|Requesting 7152 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:15:55 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:15:57 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:15:57 2007|Climateprediction.net Beta|Resuming task hadcm3transb1_0d2a_50356104_0 using hadcm3trans version 524
Thu Jan 25 14:15:57 2007|SETI@home|Pausing task 06no03aa.23964.27264.678406.3.151_2 (left in memory)
Thu Jan 25 14:15:57 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:15:57 2007|Einstein@Home|Unrecoverable error for result h1_0380.0_S5R1__15_S5RIa_0 (Couldn't start or resume: -146)
Thu Jan 25 14:15:57 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:15:57 2007||Rescheduling CPU: start failed
Thu Jan 25 14:15:57 2007|Climateprediction.net Beta|Pausing task hadcm3transb1_0d2a_50356104_0 (left in memory)
Thu Jan 25 14:15:57 2007|SETI@home|Resuming task 06no03aa.23964.27264.678406.3.151_2 using setiathome_enhanced version 513
Thu Jan 25 14:15:57 2007|Einstein@Home|Unexpected state 7 for task h1_0380.0_S5R1__15_S5RIa_0
Thu Jan 25 14:15:58 2007|Einstein@Home|Computation for task h1_0380.0_S5R1__15_S5RIa_0 finished
Thu Jan 25 14:17:00 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:17:00 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:17:00 2007|Einstein@Home|Requesting 8507 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:17:05 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:17:07 2007|Einstein@Home|Started download of file grid_0370_h_T02_S5RI.dat
Thu Jan 25 14:17:09 2007|Einstein@Home|Finished download of file grid_0370_h_T02_S5RI.dat
Thu Jan 25 14:17:09 2007|Einstein@Home|Throughput 30650 bytes/sec
Thu Jan 25 14:17:10 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:17:10 2007|Climateprediction.net Beta|Resuming task hadcm3transb1_0d2a_50356104_0 using hadcm3trans version 524
Thu Jan 25 14:17:10 2007|SETI@home|Pausing task 06no03aa.23964.27264.678406.3.151_2 (left in memory)
Thu Jan 25 14:17:10 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:17:10 2007|Einstein@Home|Unrecoverable error for result h1_0360.5_S5R1__239_S5RIa_1 (Couldn't start or resume: -146)
Thu Jan 25 14:17:10 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:17:10 2007||Rescheduling CPU: start failed
Thu Jan 25 14:17:10 2007|Einstein@Home|Unexpected state 7 for task h1_0360.5_S5R1__239_S5RIa_1
Thu Jan 25 14:17:11 2007|Einstein@Home|Computation for task h1_0360.5_S5R1__239_S5RIa_1 finished
Thu Jan 25 14:18:10 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:18:10 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:18:10 2007|Einstein@Home|Requesting 9753 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:18:15 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:18:17 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:18:17 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:18:17 2007|Einstein@Home|Unrecoverable error for result h1_0360.5_S5R1__238_S5RIa_1 (Couldn't start or resume: -146)
Thu Jan 25 14:18:17 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:18:17 2007||Rescheduling CPU: start failed
Thu Jan 25 14:18:17 2007|Einstein@Home|Unexpected state 7 for task h1_0360.5_S5R1__238_S5RIa_1
Thu Jan 25 14:18:18 2007|Einstein@Home|Computation for task h1_0360.5_S5R1__238_S5RIa_1 finished
Thu Jan 25 14:19:20 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:19:20 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:19:20 2007|Einstein@Home|Requesting 10972 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:19:30 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:19:33 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:19:33 2007|Einstein@Home|Can't create shared memory: system shmat
Thu Jan 25 14:19:33 2007|Einstein@Home|Unrecoverable error for result h1_0380.0_S5R1__14_S5RIa_0 (Couldn't start or resume: -146)
Thu Jan 25 14:19:33 2007|Einstein@Home|Deferring scheduler requests for 1 minutes and 0 seconds
Thu Jan 25 14:19:33 2007||Rescheduling CPU: start failed
Thu Jan 25 14:19:33 2007|Einstein@Home|Unexpected state 7 for task h1_0380.0_S5R1__14_S5RIa_0
Thu Jan 25 14:19:34 2007|Einstein@Home|Computation for task h1_0380.0_S5R1__14_S5RIa_0 finished
Thu Jan 25 14:20:36 2007||Rescheduling CPU: application exited
Thu Jan 25 14:20:36 2007|SETI@home|Computation for task 01my00ab.5266.30897.604828.3.194_1 finished
Thu Jan 25 14:20:36 2007|SETI@home|Resuming task 06no03aa.23964.27264.678406.3.151_2 using setiathome_enhanced version 513
Thu Jan 25 14:20:36 2007|SETI@home|Resuming task 01my00ab.5266.31618.829832.3.129_2 using setiathome_enhanced version 513
Thu Jan 25 14:20:36 2007|Einstein@Home|Sending scheduler request to http://einstein.phys.uwm.edu/EinsteinAtHome_cgi/cgi
Thu Jan 25 14:20:36 2007|Einstein@Home|Reason: To fetch work
Thu Jan 25 14:20:36 2007|Einstein@Home|Requesting 12273 seconds of new work, and reporting 1 completed tasks
Thu Jan 25 14:20:38 2007|SETI@home|Started upload of file 01my00ab.5266.30897.604828.3.194_1_0
Thu Jan 25 14:20:41 2007|Einstein@Home|Scheduler request succeeded
Thu Jan 25 14:20:43 2007||Rescheduling CPU: files downloaded
Thu Jan 25 14:20:43 2007|SETI@home|Pausing task 01my00ab.5266.31618.829832.3.129_2 (left in memory)
Thu Jan 25 14:20:43 2007|Einstein@Home|Starting task h1_0380.0_S5R1__13_S5RIa_0 using einstein_S5RI version 428
Thu Jan 25 14:20:49 2007|SETI@home|Finished upload of file 01my00ab.5266.30897.604828.3.194_1_0
Thu Jan 25 14:20:49 2007|SETI@home|Throughput 3288 bytes/sec

Jord
Joined: 26 Jan 05
Posts: 2,952
Credit: 5,779,100
RAC: 0

What is this error telling me?

Quote:
Can't create shared memory: system shmat


This is the main error. BOINC cannot use the shared memory segment. Shared memory is a large block of memory used by multiple CPUs.

In your case it would seem that BOINC can't create that shared memory for one or more of your CPUs. Probably because the memory it is trying to map is already in use by something else. If it happens again, try to exit BOINC and restart it. If it still happens, restart your Mac.

Jim Wilkins
Jim Wilkins
Joined: 1 Jun 05
Posts: 33
Credit: 28,426,884
RAC: 0

RE: RE: Can't create

Message 60099 in response to message 60098

Quote:
Quote:
Can't create shared memory: system shmat

This is the main error. BOINC cannot use the shared memory segment. Shared memory is a large block of memory used by multiple CPUs.

In your case it would seem that BOINC can't create that shared memory for one or more of your CPUs. Probably because the memory it is trying to map is already in use by something else. If it happens again, try to exit BOINC and restart it. If it still happens, restart your Mac.

Thanks! It seems to have gone away.

Jim

Odysseus
Odysseus
Joined: 17 Dec 05
Posts: 372
Credit: 17,089,207
RAC: 5,593

RE: RE: RE: Can't

Message 60100 in response to message 60099

Quote:
Quote:
Quote:
Can't create shared memory: system shmat

This is the main error. BOINC cannot use the shared memory segment. Shared memory is a large block of memory used by multiple CPUs.


Not large enough, it seems … see below.

Quote:
Quote:
In your case it would seem that BOINC can't create that shared memory for one or more of your CPUs. Probably because the memory it is trying to map is already in use by something else. If it happens again, try to exit BOINC and restart it. If it still happens, restart your Mac.

Thanks! It seems to have gone away.


Restarting will probably be only a temporary solution for a multiple-CPU system running several projects. Apparently Apple configures all systems’ shared memory the same, regardless of the amount of RAM installed or how many CPUs they have, and this turns out to be inadequate for BOINC in such cases, as each active task needs a block of shared memory where the apps keep data that needs to be available to the client.

A long-term solution is outlined in an article on the Pirates@home site called Configuring Shared Memory on Mac OS X. My dual-core G5 got a rash of the above errors last fall, shortly after attaching to its fifth project IIRC, but since I applied the ‘patch’ the problem hasn’t recurred—and the system has only been rebooted perhaps half a dozen times over that entire interval.

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