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Fix dbufstats_001_pos

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Implement a new helper within_tolerance to test if a value
is within range of a target.

Because the dbufstats and dbufs kstat file are being read
at slightly different times, it is possible for stats to be
slightly off. Use within_tolerance to determine if the value
is "close enough" to the target.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Closes #7239 
Closes #7266
This commit is contained in:
Giuseppe Di Natale
2018-03-07 09:53:04 -08:00
committed by Brian Behlendorf
parent 639b18944a
commit a07ad58847
2 changed files with 28 additions and 4 deletions
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tests/zfs-tests/tests/functional/arc/dbufstats_001_pos.ksh
+5 -4
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@@ -55,10 +55,11 @@ function testdbufstat # stat_name dbufstat_filter
[[ -n "$2" ]] && filter="-F $2"
verify_eq \
$(grep -w "$name" "$DBUFSTATS_FILE" | awk '{ print $3 }') \
$(dbufstat.py -bxn -i "$DBUFS_FILE" "$filter" | wc -l) \
"$name"
from_dbufstat=$(grep -w "$name" "$DBUFSTATS_FILE" | awk '{ print $3 }')
from_dbufs=$(dbufstat.py -bxn -i "$DBUFS_FILE" "$filter" | wc -l)
within_tolerance $from_dbufstat $from_dbufs 5 \
|| log_fail "Stat $name exceeded tolerance"
}
verify_runnable "both"