== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:52:20 (1763351540)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3155 s, 9.3 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-ffff969b480d5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.387772
Iter 1/10: OSS cache speed: 0.476084
Iter 1/10: ladvise speed: 0.500111
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.487546
Iter 2/10: OSS cache speed: 0.524868
Iter 2/10: ladvise speed: 0.605402
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.539753
Iter 3/10: OSS cache speed: 0.610067
Iter 3/10: ladvise speed: 0.58515
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.529527
Iter 4/10: OSS cache speed: 0.638558
Iter 4/10: ladvise speed: 0.640314
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.5431
Iter 5/10: OSS cache speed: 0.629976
Iter 5/10: ladvise speed: 0.651301
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.57381
Iter 6/10: OSS cache speed: 0.598175
Iter 6/10: ladvise speed: 0.643605
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.599345
Iter 7/10: OSS cache speed: 0.694347
Iter 7/10: ladvise speed: 0.77955
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.768518
Iter 8/10: OSS cache speed: 0.817063
Iter 8/10: ladvise speed: 0.91469
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.754055
Iter 9/10: OSS cache speed: 0.980026
Iter 9/10: ladvise speed: 0.93918
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.777382
Iter 10/10: OSS cache speed: 0.930605
Iter 10/10: ladvise speed: 0.9324
Average uncached read: .59
Average speedup with OSS cached read:  .68 = +15%
Average speedup with ladvise willread:  .71 = +20%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0