== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:16:40 (1786832200)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4287 s, 8.4 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff90770895b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353282
Iter 1/10: OSS cache speed: 0.409934
Iter 1/10: ladvise speed: 0.315327
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.379222
Iter 2/10: OSS cache speed: 0.377364
Iter 2/10: ladvise speed: 0.33648
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.356075
Iter 3/10: OSS cache speed: 0.403616
Iter 3/10: ladvise speed: 0.35874
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.309734
Iter 4/10: OSS cache speed: 0.314246
Iter 4/10: ladvise speed: 0.29646
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.3579
Iter 5/10: OSS cache speed: 0.359576
Iter 5/10: ladvise speed: 0.334988
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.305244
Iter 6/10: OSS cache speed: 0.340403
Iter 6/10: ladvise speed: 0.393562
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.347435
Iter 7/10: OSS cache speed: 0.369176
Iter 7/10: ladvise speed: 0.366922
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346917
Iter 8/10: OSS cache speed: 0.392718
Iter 8/10: ladvise speed: 0.392776
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.313522
Iter 9/10: OSS cache speed: 0.359141
Iter 9/10: ladvise speed: 0.396789
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.36203
Iter 10/10: OSS cache speed: 0.418981
Iter 10/10: ladvise speed: 0.336969
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0