== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:27:17 (1789068437)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0613 s, 8.7 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-ffff9bfa83517000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385348
Iter 1/10: OSS cache speed: 0.370624
Iter 1/10: ladvise speed: 0.394846
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381865
Iter 2/10: OSS cache speed: 0.394306
Iter 2/10: ladvise speed: 0.312028
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352278
Iter 3/10: OSS cache speed: 0.367574
Iter 3/10: ladvise speed: 0.311683
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.326922
Iter 4/10: OSS cache speed: 0.276421
Iter 4/10: ladvise speed: 0.288843
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.278923
Iter 5/10: OSS cache speed: 0.340703
Iter 5/10: ladvise speed: 0.32075
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.337121
Iter 6/10: OSS cache speed: 0.334497
Iter 6/10: ladvise speed: 0.337413
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331763
Iter 7/10: OSS cache speed: 0.352255
Iter 7/10: ladvise speed: 0.32223
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.356749
Iter 8/10: OSS cache speed: 0.352147
Iter 8/10: ladvise speed: 0.331845
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.35945
Iter 9/10: OSS cache speed: 0.333891
Iter 9/10: ladvise speed: 0.353276
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.31924
Iter 10/10: OSS cache speed: 0.336461
Iter 10/10: ladvise speed: 0.346639
Average uncached read: .34
Average speedup with OSS cached read:  .34 = +0%
Average speedup with ladvise willread:  .33 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0