Read the statement by Michael Teeuw here.
mmap() failed: Cannot allocate memory
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@sdetweil I’ve done a lot of testing and I think the problem is audio.
For now I have found a configuration that does not give many problems.
Could it be a resource issue? -
@Egnos could be. the error is no memory
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@sdetweil said in mmap() failed: Cannot allocate memory:
the error is no memory
No memory do you mean RAM or SD memory?
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@Egnos ram technically heap.
could be a bug in the module or a library it uses
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I found the follow procedure for prevent Raspberry Pi memory allocation failure.
- All commands should be issued as root:
sudo su1.5) If you have previously uninstalled dphys-swapfile:
apt-get install dphys-swapfile- Set the swap file size to double the amount on RAM:
echo "CONF_SWAPSIZE=512" > /etc/dphys-swapfile dphys-swapfile setupIf you have 512 MB RAM on the Pi then set swapsize to 1024.
- Enable swap
dphys-swapfile swapon- Exit the root shell
exitAnd that’s it.
Could be the solution to use the SWAP file?
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@Egnos maybe. but I don’t know if you ever constrained before. one of the commands I asked for results from was the memory free command
free -m -
@sdetweil said in mmap() failed: Cannot allocate memory:
no idea… would take a bit of debugging
in a terminal window do
free -m
lsb_release -a
uname -aAs requested:
pi@MagicMirror:~ $ lsb_release -a No LSB modules are available. Distributor ID: Raspbian Description: Raspbian GNU/Linux 10 (buster) Release: 10 Codename: busterpi@MagicMirror:~ $ uname -a Linux MagicMirror 5.4.79-v7+ #1373 SMP Mon Nov 23 13:22:33 GMT 2020 armv7l GNU/LinuxSometimes the message “mmap() failed: Cannot allocate memory” appears before the RAM saturation, no longer allowing MMM-GoogleAssistant to be able to launch searches on YouTube, etc …
Sometimes the error appears shortly after starting MM sometimes after a long time.
In the Sound page of @Bugsounet I read that the choice of the audio player could give these problems (“With HTML5, some device have some trouble with sound output (no sound output, only chime, mmap memory issue,…)”) but I have already done some tests and the only one that works is “mpg321”.pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 452 95 43 376 373 Swap: 99 8 91 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 455 58 253 411 165 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 462 48 254 413 157 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 463 48 253 413 157 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 465 35 263 424 145 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 466 47 249 410 158 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 470 43 249 410 153 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 471 31 261 422 142 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 468 53 248 403 157 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 467 56 246 400 161 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 465 55 249 403 160 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 467 32 270 425 136 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 468 31 270 424 136 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 469 30 270 424 135 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 469 29 271 426 134 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 469 31 272 423 133 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 471 47 254 405 149 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 473 44 254 406 147 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 473 44 254 406 147 Swap: 99 84 15 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 507 46 252 371 114 Swap: 99 96 3 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 513 37 255 374 105 Swap: 99 96 3 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 508 37 260 379 105 Swap: 99 96 3 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 508 36 260 379 105 Swap: 99 96 3 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 540 37 254 347 79 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 540 37 254 346 79 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 540 37 254 346 79 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 528 48 254 348 91 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 455 120 248 348 170 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 465 60 269 398 141 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 465 60 268 398 141 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 494 35 253 394 122 Swap: 99 99 0 pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 495 54 251 374 127 Swap: 99 99 0mmap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoria ^[[Ammap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoria mmap() failed: Impossibile allocare memoriaWould you have the patience to help me?
Many Thanks.
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@Egnos said in mmap() failed: Cannot allocate memory:
Mem: 924 495 54 251 374 127
Swap: 99 99u always have memory available, and never consume any swap space…
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pi@MagicMirror:~ $ free -m total used free shared buff/cache available Mem: 924 495 54 251 374 127 Swap: 99 99 0I see that all swap memory is finished … “Used =99 and free=0”.
I dont understand why it is already using swap memory if it is not out of RAM yet …Why the swap memory always occupied?
Finished the task shouldn’t it free itself? -
@Egnos try this
for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k 2 -n -r | lessshould give a list of processes using swap, most to least
