== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:09:27 (1787566167)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6586 s, 9.0 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-ffff939892f59000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.459066
Iter 1/10: OSS cache speed: 0.40453
Iter 1/10: ladvise speed: 0.373901
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.395089
Iter 2/10: OSS cache speed: 0.513616
Iter 2/10: ladvise speed: 0.339918
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.351512
Iter 3/10: OSS cache speed: 0.409661
Iter 3/10: ladvise speed: 0.355928
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.339941
Iter 4/10: OSS cache speed: 0.41116
Iter 4/10: ladvise speed: 0.345162
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.357921
Iter 5/10: OSS cache speed: 0.344285
Iter 5/10: ladvise speed: 0.371939
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.322734
Iter 6/10: OSS cache speed: 0.375097
Iter 6/10: ladvise speed: 0.385796
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.461999
Iter 7/10: OSS cache speed: 0.482355
Iter 7/10: ladvise speed: 0.348183
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.386963
Iter 8/10: OSS cache speed: 0.443833
Iter 8/10: ladvise speed: 0.411985
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.364264
Iter 9/10: OSS cache speed: 0.376973
Iter 9/10: ladvise speed: 0.325308
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363878
Iter 10/10: OSS cache speed: 0.431924
Iter 10/10: ladvise speed: 0.439904
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .36 = +-5%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0