5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions are
9 # * Redistributions of source code must retain the above copyright
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13 # notice, this list of conditions and the following disclaimer in the
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16 # * Neither the name of Red Hat nor the names of its contributors may be
17 # used to endorse or promote products derived from this software without
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20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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39 requires
dd iflag
=count_bytes
</dev
/null
43 cleanup_fn
rm -f $files
45 nbdkit
-fv -U - sh
- \
47 --run 'nbdsh --uri "$uri" -c "
49 for i in range(0, 512*10, 512):
51 # Give some time for bgthread to finish.
68 echo "$@" >> readahead.out
71 echo "$@" >> readahead.out
72 dd if=/dev/zero count=$3 iflag=count_bytes
82 # We should see the pread requests, and additional cache requests for
83 # the 32K region following each pread request.
84 for i
in `seq 0 512 $((512*10 - 512))` ; do
85 grep "pread 512 $i" readahead.out
86 grep "cache 32768 $((i+512))" readahead.out