run_test 101c "check stripe_size aligned read-ahead ================="
set_read_ahead() {
- $LCTL get_param -n llite.*.max_read_ahead_mb | head -n 1
- $LCTL set_param -n llite.*.max_read_ahead_mb $1 > /dev/null 2>&1
+ $LCTL get_param -n llite.*.max_read_ahead_mb | head -n 1
+ $LCTL set_param -n llite.*.max_read_ahead_mb $1 > /dev/null 2>&1
}
test_101d() {
[ $PARALLEL == "yes" ] && skip "skip parallel run" && return
local file=$DIR/$tfile
- local size=${FILESIZE_101c:-500}
+ local sz_MB=${FILESIZE_101d:-500}
local ra_MB=${READAHEAD_MB:-40}
- local space=$(df -P $DIR | tail -n 1 | awk '{ print $4 }')
- [ $space -gt $((size * 1024)) ] ||
- { skip "Need free space ${size}M, have ${space}K" && return; }
+ local free_MB=$(($(df -P $DIR | tail -n 1 | awk '{ print $4 }') / 1024))
+ [ $free_MB -lt $sz_MB ] &&
+ skip "Need free space ${sz_MB}M, have ${free_MB}M" && return
- echo "Creating test file $file of size ${size}M with ${space}K free space"
+ echo "Create test file $file size ${sz_MB}M, ${free_MB}M free"
$SETSTRIPE -c -1 $file || error "setstripe failed"
- dd if=/dev/zero of=$file bs=1M count=$size || error "dd failed"
+
+ dd if=/dev/zero of=$file bs=1M count=$sz_MB || error "dd failed"
echo Cancel LRU locks on lustre client to flush the client cache
cancel_lru_locks osc
- echo Disable read-ahead
- local old_READAHEAD=$(set_read_ahead 0)
+ echo Disable read-ahead
+ local old_READAHEAD=$(set_read_ahead 0)
- echo Reading the test file $file with read-ahead disabled
- time_ra_OFF=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$size")
+ echo Reading the test file $file with read-ahead disabled
+ local raOFF=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$sz_MB")
- echo Cancel LRU locks on lustre client to flush the client cache
- cancel_lru_locks osc
- echo Enable read-ahead with ${ra_MB}MB
- set_read_ahead $ra_MB
+ echo Cancel LRU locks on lustre client to flush the client cache
+ cancel_lru_locks osc
+ echo Enable read-ahead with ${ra_MB}MB
+ set_read_ahead $ra_MB
- echo Reading the test file $file with read-ahead enabled
- time_ra_ON=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$size")
+ echo Reading the test file $file with read-ahead enabled
+ local raON=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$sz_MB")
- echo read-ahead disabled time read $time_ra_OFF
- echo read-ahead enabled time read $time_ra_ON
+ echo "read-ahead disabled time read $raOFF"
+ echo "read-ahead enabled time read $raON"
set_read_ahead $old_READAHEAD
rm -f $file
wait_delete_completed
- [ $time_ra_ON -lt $time_ra_OFF ] ||
- error "read-ahead enabled time read (${time_ra_ON}s) is more than
- read-ahead disabled time read (${time_ra_OFF}s) filesize ${size}M"
+ [ $raOFF -le 1 -o $raON -lt $raOFF ] ||
+ error "readahead ${raON}s > no-readahead ${raOFF}s ${sz_MB}M"
}
-run_test 101d "file read with and without read-ahead enabled ================="
+run_test 101d "file read with and without read-ahead enabled"
test_101e() {
[ $PARALLEL == "yes" ] && skip "skip parallel run" && return
- local file=$DIR/$tfile
- local size=500 #KB
- local count=100
- local blksize=1024
-
- local space=$(df -P $DIR | tail -n 1 | awk '{ print $4 }')
- local need_space=$((count * size))
- [ $space -gt $need_space ] ||
- { skip_env "Need free space $need_space, have $space" && return; }
-
- echo Creating $count ${size}K test files
- for ((i = 0; i < $count; i++)); do
- dd if=/dev/zero of=${file}_${i} bs=$blksize count=$size 2>/dev/null
- done
+ local file=$DIR/$tfile
+ local size_KB=500 #KB
+ local count=100
+ local bsize=1024
+
+ local free_KB=$(df -P $DIR | tail -n 1 | awk '{ print $4 }')
+ local need_KB=$((count * size_KB))
+ [ $free_KB -le $need_KB ] &&
+ skip_env "Need free space $need_KB, have $free_KB" && return
+
+ echo "Creating $count ${size_KB}K test files"
+ for ((i = 0; i < $count; i++)); do
+ dd if=/dev/zero of=$file.$i bs=$bsize count=$size_KB 2>/dev/null
+ done
- echo Cancel LRU locks on lustre client to flush the client cache
- cancel_lru_locks osc
+ echo "Cancel LRU locks on lustre client to flush the client cache"
+ cancel_lru_locks osc
- echo Reset readahead stats
- $LCTL set_param -n llite.*.read_ahead_stats 0
+ echo "Reset readahead stats"
+ $LCTL set_param -n llite.*.read_ahead_stats 0
- for ((i = 0; i < $count; i++)); do
- dd if=${file}_${i} of=/dev/null bs=$blksize count=$size 2>/dev/null
- done
+ for ((i = 0; i < $count; i++)); do
+ dd if=$file.$i of=/dev/null bs=$bsize count=$size_KB 2>/dev/null
+ done
- local miss=$($LCTL get_param -n llite.*.read_ahead_stats | \
- get_named_value 'misses' | cut -d" " -f1 | calc_total)
+ local miss=$($LCTL get_param -n llite.*.read_ahead_stats |
+ get_named_value 'misses' | cut -d" " -f1 | calc_total)
- for ((i = 0; i < $count; i++)); do
- rm -rf ${file}_${i} 2>/dev/null
- done
+ for ((i = 0; i < $count; i++)); do
+ rm -rf $file.$i 2>/dev/null
+ done
- #10000 means 20% reads are missing in readahead
- [ $miss -lt 10000 ] || error "misses too much for small reads"
+ #10000 means 20% reads are missing in readahead
+ [ $miss -lt 10000 ] || error "misses too much for small reads"
}
run_test 101e "check read-ahead for small read(1k) for small files(500k)"
git://git.whamcloud.com / fs / lustre-release.git / blobdiff