+ladvise_no_type()
+{
+ local type=$1
+ local file=$2
+
+ lfs ladvise -a invalid $file 2>&1 | grep "Valid types" |
+ awk -F: '{print $2}' | grep $type > /dev/null
+ if [ $? -ne 0 ]; then
+ return 0
+ fi
+ return 1
+}
+
+ladvise_no_ioctl()
+{
+ local file=$1
+
+ lfs ladvise -a willread $file > /dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ return 1
+ fi
+
+ lfs ladvise -a willread $file 2>&1 |
+ grep "Inappropriate ioctl for device" > /dev/null
+ if [ $? -eq 0 ]; then
+ return 0
+ fi
+ return 1
+}
+
+ladvise_willread_performance()
+{
+ local repeat=10
+ local average_cache=0
+ local average_ladvise=0
+ for ((i = 1; i <= $repeat; i++)); do
+ echo "Iter $i/$repeat: reading without willread hint"
+ cancel_lru_locks osc
+ do_nodes $(comma_list $(osts_nodes)) \
+ "echo 3 > /proc/sys/vm/drop_caches"
+ local speed_origin=$($READS -f $DIR/$tfile -s $size \
+ -b 4096 -n $((size / 4096)) -t 60 |
+ sed -e '/^$/d' -e 's#.*s, ##' -e 's#MB/s##')
+
+ echo "Iter $i/$repeat: Reading again without willread hint"
+ cancel_lru_locks osc
+ local speed_cache=$($READS -f $DIR/$tfile -s $size \
+ -b 4096 -n $((size / 4096)) -t 60 |
+ sed -e '/^$/d' -e 's#.*s, ##' -e 's#MB/s##')
+
+ echo "Iter $i/$repeat: reading with willread hint"
+ cancel_lru_locks osc
+ do_nodes $(comma_list $(osts_nodes)) \
+ "echo 3 > /proc/sys/vm/drop_caches"
+ lfs ladvise -a willread $DIR/$tfile ||
+ error "Ladvise failed"
+ local speed_ladvise=$($READS -f $DIR/$tfile -s $size \
+ -b 4096 -n $((size / 4096)) -t 60 |
+ sed -e '/^$/d' -e 's#.*s, ##' -e 's#MB/s##')
+
+ local cache_speedup=$(echo "scale=2; \
+ ($speed_cache-$speed_origin)/$speed_origin*100" | bc)
+ cache_speedup=$(echo ${cache_speedup%.*})
+ echo "Iter $i/$repeat: cache speedup: $cache_speedup%"
+ average_cache=$((average_cache + cache_speedup))
+
+ local ladvise_speedup=$(echo "scale=2; \
+ ($speed_ladvise-$speed_origin)/$speed_origin*100" | bc)
+ ladvise_speedup=$(echo ${ladvise_speedup%.*})
+ echo "Iter $i/$repeat: ladvise speedup: $ladvise_speedup%"
+ average_ladvise=$((average_ladvise + ladvise_speedup))
+ done
+ average_cache=$((average_cache / repeat))
+ average_ladvise=$((average_ladvise / repeat))
+
+ if [ $average_cache -lt 20 ]; then
+ echo "Speedup with cache is less than 20% ($average_cache%),"\
+ "skipping check of speedup with willread:"\
+ "$average_ladvise%"
+ return 0
+ fi
+
+ local lowest_speedup=$((average_cache / 2))
+ [ $average_ladvise -gt $lowest_speedup ] ||
+ error "Speedup with willread is less than $lowest_speedup%,"\
+ "got $average_ladvise%"
+ echo "Speedup with willread ladvise: $average_ladvise%"
+ echo "Speedup with cache: $average_cache%"
+}
+
+test_255a() {
+ lfs setstripe -c -1 -i 0 $DIR/$tfile || error "$tfile failed"
+
+ ladvise_no_type willread $DIR/$tfile &&
+ skip "willread ladvise is not supported" && return
+
+ ladvise_no_ioctl $DIR/$tfile &&
+ skip "ladvise ioctl is not supported" && return
+
+ [ $(lustre_version_code ost1) -lt $(version_code 2.8.54) ] &&
+ skip "lustre < 2.8.54 does not support ladvise " && return
+
+ local size_mb=100
+ local size=$((size_mb * 1048576))
+ dd if=/dev/zero of=$DIR/$tfile bs=1048576 count=$size_mb ||
+ error "dd to $DIR/$tfile failed"
+
+ lfs ladvise -a willread $DIR/$tfile ||
+ error "Ladvise failed with no range argument"
+
+ lfs ladvise -a willread -s 0 $DIR/$tfile ||
+ error "Ladvise failed with no -l or -e argument"
+
+ lfs ladvise -a willread -e 1 $DIR/$tfile ||
+ error "Ladvise failed with only -e argument"
+
+ lfs ladvise -a willread -l 1 $DIR/$tfile ||
+ error "Ladvise failed with only -l argument"
+
+ lfs ladvise -a willread -s 2 -e 1 $DIR/$tfile &&
+ error "End offset should not be smaller than start offset"
+
+ lfs ladvise -a willread -s 2 -e 2 $DIR/$tfile &&
+ error "End offset should not be equal to start offset"
+
+ lfs ladvise -a willread -s $size -l 1 $DIR/$tfile ||
+ error "Ladvise failed with overflowing -s argument"
+
+ lfs ladvise -a willread -s 1 -e $((size + 1)) $DIR/$tfile ||
+ error "Ladvise failed with overflowing -e argument"
+
+ lfs ladvise -a willread -s 1 -l $size $DIR/$tfile ||
+ error "Ladvise failed with overflowing -l argument"
+
+ lfs ladvise -a willread -l 1 -e 2 $DIR/$tfile &&
+ error "Ladvise succeeded with conflicting -l and -e arguments"
+
+ echo "Synchronous ladvise should wait"
+ local delay=4
+#define OBD_FAIL_OST_LADVISE_PAUSE 0x237
+ do_nodes $(comma_list $(osts_nodes)) \
+ $LCTL set_param fail_val=$delay fail_loc=0x237
+
+ local start_ts=$SECONDS
+ lfs ladvise -a willread $DIR/$tfile ||
+ error "Ladvise failed with no range argument"
+ local end_ts=$SECONDS
+ local inteval_ts=$((end_ts - start_ts))
+
+ if [ $inteval_ts -lt $(($delay - 1)) ]; then
+ error "Synchronous advice didn't wait reply"
+ fi
+
+ echo "Asynchronous ladvise shouldn't wait"
+ local start_ts=$SECONDS
+ lfs ladvise -a willread -b $DIR/$tfile ||
+ error "Ladvise failed with no range argument"
+ local end_ts=$SECONDS
+ local inteval_ts=$((end_ts - start_ts))
+
+ if [ $inteval_ts -gt $(($delay / 2)) ]; then
+ error "Asynchronous advice blocked"
+ fi
+
+ do_nodes $(comma_list $(osts_nodes)) $LCTL set_param fail_loc=0
+ ladvise_willread_performance
+}
+run_test 255a "check 'lfs ladvise -a willread'"
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff