== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:36:36 (1746138996)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.58875 s, 22.9 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-ffff8800b589d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.780665
Iter 1/10: OSS cache speed: 0.870374
Iter 1/10: ladvise speed: 0.807455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.82116
Iter 2/10: OSS cache speed: 0.80934
Iter 2/10: ladvise speed: 0.768981
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.713208
Iter 3/10: OSS cache speed: 0.760388
Iter 3/10: ladvise speed: 0.771039
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.77216
Iter 4/10: OSS cache speed: 0.704631
Iter 4/10: ladvise speed: 0.798499
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.849137
Iter 5/10: OSS cache speed: 0.750743
Iter 5/10: ladvise speed: 0.758707
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.704833
Iter 6/10: OSS cache speed: 0.695833
Iter 6/10: ladvise speed: 0.708923
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.683989
Iter 7/10: OSS cache speed: 0.728135
Iter 7/10: ladvise speed: 0.733469
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.745598
Iter 8/10: OSS cache speed: 0.792896
Iter 8/10: ladvise speed: 0.807516
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.767092
Iter 9/10: OSS cache speed: 0.83769
Iter 9/10: ladvise speed: 0.900081
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.903082
Iter 10/10: OSS cache speed: 1.03838
Iter 10/10: ladvise speed: 0.804963
Average uncached read: .77
Average speedup with OSS cached read:  .79 = +2%
Average speedup with ladvise willread:  .78 = +1%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0