== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:23:59 (1783139039)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.2428 s, 6.1 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-ffff926807d2c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.433637
Iter 1/10: OSS cache speed: 0.469661
Iter 1/10: ladvise speed: 0.413358
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381163
Iter 2/10: OSS cache speed: 0.436254
Iter 2/10: ladvise speed: 0.415783
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387952
Iter 3/10: OSS cache speed: 0.401259
Iter 3/10: ladvise speed: 0.421513
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.362225
Iter 4/10: OSS cache speed: 0.491695
Iter 4/10: ladvise speed: 0.356069
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.424392
Iter 5/10: OSS cache speed: 0.379115
Iter 5/10: ladvise speed: 0.399948
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.313783
Iter 6/10: OSS cache speed: 0.409681
Iter 6/10: ladvise speed: 0.477854
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.428168
Iter 7/10: OSS cache speed: 0.467421
Iter 7/10: ladvise speed: 0.487998
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.49911
Iter 8/10: OSS cache speed: 0.515613
Iter 8/10: ladvise speed: 0.523048
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.491488
Iter 9/10: OSS cache speed: 0.487666
Iter 9/10: ladvise speed: 0.514309
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.497032
Iter 10/10: OSS cache speed: 0.543217
Iter 10/10: ladvise speed: 0.567769
Average uncached read: .42
Average speedup with OSS cached read:  .46 = +9%
Average speedup with ladvise willread:  .45 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0