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Re: [Discuss-gnuradio] MacOS 10.7.3 - mmap or shm_open is not available
From: |
Michael Dickens |
Subject: |
Re: [Discuss-gnuradio] MacOS 10.7.3 - mmap or shm_open is not available |
Date: |
Mon, 9 Apr 2012 08:13:16 -0400 |
Hmmph. Well, I bet Apple did something "clever" inside the Darwin kernel that
messed with shared memory in 10.7.3. There's probably a work-around too, but I
have no idea what it might be right now since I'm still using 10.6.8: it's
stable and works well for what I need right now. I'll look into this issue at
the end of this week unless someone else gets there first :) - MLD
On Apr 9, 2012, at 6:08 AM, Steven wrote:
>
> On 9 Apr 2012, at 01:16, Michael Dickens wrote:
>
>>> Does anyone have any pointers as to where I should be looking?
>>
>>
>> Hi Steven - First, the humor < http://xkcd.com/138/ >.
>>
>
> I was waiting for something like that :o)
>
>
>> Do "ipcs -a" to see how many shared memory attachments are in place. You
>> might see a lot, given that 'shmat' returns 'too many files open'. Here's
>> the BASH script I run, very often in my work right now, to try to remove
>> extraneous ones:
>>
>> for tf in `ipcs -m | sed -e 1d -e 2d -e 3d | awk '{print $2 }'`; do
>> ipcrm -m $tf ;
>> done
>>
>
> I only seem to have one entry:
>
> $ ipcs -a
> IPC status from <running system> as of Mon Apr 9 11:03:42 BST 2012
> T ID KEY MODE OWNER GROUP CREATOR CGROUP CBYTES
> QNUM QBYTES LSPID LRPID STIME RTIME CTIME
> Message Queues:
>
> T ID KEY MODE OWNER GROUP CREATOR CGROUP NATTCH
> SEGSZ CPID LPID ATIME DTIME CTIME
> Shared Memory:
> m 262157 0x00000000 --rw------- steven staff steven staff 2
> 393216 2302 2120 19:39:30 20:03:03 19:39:30
>
> T ID KEY MODE OWNER GROUP CREATOR CGROUP NSEMS
> OTIME CTIME
> Semaphores:
>
> $ ipcrm -m 262157
> ipcrm: shmid(262157): : Invalid argument
>
>
>
>> If all else fails, reboot and see if that doesn't take care of the issue, at
>> least for now. If the issue persists, it might be a new Lion issue from
>> 10.7.3; I know I've run GNU Radio in 10.7.[0-2]. I'll hopefully have a few
>> spare cycles later this week to look into GNU Radio on Lion. - MLD
>
> I've already tried that, doesn't seem to make any difference. I know of at
> least one other person on 10.7.3 that is having this exact same issue.