== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:05:40 (1763348740)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.9501 s, 9.6 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-ffffa01a05016000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.358727
Iter 1/10: OSS cache speed: 0.423799
Iter 1/10: ladvise speed: 0.387914
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.403383
Iter 2/10: OSS cache speed: 0.395084
Iter 2/10: ladvise speed: 0.309081
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.36115
Iter 3/10: OSS cache speed: 0.362823
Iter 3/10: ladvise speed: 0.330788
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.352241
Iter 4/10: OSS cache speed: 0.357131
Iter 4/10: ladvise speed: 0.344213
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.323109
Iter 5/10: OSS cache speed: 0.386134
Iter 5/10: ladvise speed: 0.387268
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342241
Iter 6/10: OSS cache speed: 0.362649
Iter 6/10: ladvise speed: 0.383951
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.438827
Iter 7/10: OSS cache speed: 0.401007
Iter 7/10: ladvise speed: 0.448788
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.443185
Iter 8/10: OSS cache speed: 0.40731
Iter 8/10: ladvise speed: 0.34607
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.407984
Iter 9/10: OSS cache speed: 0.360478
Iter 9/10: ladvise speed: 0.321143
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.330787
Iter 10/10: OSS cache speed: 0.352167
Iter 10/10: ladvise speed: 0.384622
Average uncached read: .37
Average speedup with OSS cached read:  .38 = +2%
Average speedup with ladvise willread:  .36 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0