== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:49:17 (1764733757)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.6106 s, 10.9 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-ffff9dc106210000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.407173
Iter 1/10: OSS cache speed: 0.333719
Iter 1/10: ladvise speed: 0.405293
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.486896
Iter 2/10: OSS cache speed: 0.534705
Iter 2/10: ladvise speed: 0.26019
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.447223
Iter 3/10: OSS cache speed: 0.454172
Iter 3/10: ladvise speed: 0.365018
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.447435
Iter 4/10: OSS cache speed: 0.475457
Iter 4/10: ladvise speed: 0.650526
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.626694
Iter 5/10: OSS cache speed: 0.687704
Iter 5/10: ladvise speed: 0.772898
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.79399
Iter 6/10: OSS cache speed: 0.813869
Iter 6/10: ladvise speed: 0.816016
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.846119
Iter 7/10: OSS cache speed: 0.840179
Iter 7/10: ladvise speed: 0.867048
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.943653
Iter 8/10: OSS cache speed: 0.425607
Iter 8/10: ladvise speed: 0.600428
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.635174
Iter 9/10: OSS cache speed: 0.541886
Iter 9/10: ladvise speed: 0.790832
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.986233
Iter 10/10: OSS cache speed: 0.829062
Iter 10/10: ladvise speed: 0.792181
Average uncached read: .66
Average speedup with OSS cached read:  .59 = +-10%
Average speedup with ladvise willread:  .63 = +-4%
Speedup with OSS cached read less than 20%,  got -10%. Skipping ladvise willread check.
fail_loc=0