test/sys_req/dev_shm_size.sh

   1 #!/bin/sh
   2
   3 # this script verifies that /dev/shm is big enough for test purposes
   4 # 512MB seems to be enough with room to spare at the time of writing this test
   5 # (motivation for this check is the default docker /dev/shm size of 64M, which
   6 # was occasionally overrun when running the tests)
   7 req_min_size_megabytes=512
   8
   9 cur_size=`df -BM --output=size /dev/shm | awk ' NR==2 { print $1 } ' | cut -f 1 -d 'M'`
  10
  11 if test "$V" = "2"
  12 then
  13         echo -n "Checking /dev/shm size..."
  14 fi
  15
  16 if test "$cur_size" -lt "$req_min_size_megabytes"
  17 then
  18         echo "/dev/shm size ${cur_size}M is too small, attempting to enlarge to ${req_min_size_megabytes}M."
  19         sudo mount -o remount /dev/shm -o size=512M
  20         cur_size=`df -BM --output=size /dev/shm | awk ' NR==2 { print $1 } ' | cut -f 1 -d 'M'`
  21         if test "$cur_size" -lt "$req_min_size_megabytes"
  22         then
  23                 echo "Couldn't enlarge /dev/shm. Please enlarge it manually so that it's at least ${req_min_size_megabytes}M big."
  24                 exit 1
  25         fi
  26         echo "/dev/shm successfully enlarged."
  27 elif test "$V" = "2"
  28 then
  29         echo "OK (current size: ${cur_size}M, required size: ${req_min_size_megabytes}M)"
  30 fi