== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:16:30 (1787710590)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7787 s, 8.9 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-ffffa02502973000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.374602
Iter 1/10: OSS cache speed: 0.31615
Iter 1/10: ladvise speed: 0.370241
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.383016
Iter 2/10: OSS cache speed: 0.393401
Iter 2/10: ladvise speed: 0.321109
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.357894
Iter 3/10: OSS cache speed: 0.380657
Iter 3/10: ladvise speed: 0.294882
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.345303
Iter 4/10: OSS cache speed: 0.336907
Iter 4/10: ladvise speed: 0.380913
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.319963
Iter 5/10: OSS cache speed: 0.322889
Iter 5/10: ladvise speed: 0.319049
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.346719
Iter 6/10: OSS cache speed: 0.333037
Iter 6/10: ladvise speed: 0.33228
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.305838
Iter 7/10: OSS cache speed: 0.274327
Iter 7/10: ladvise speed: 0.31189
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.351137
Iter 8/10: OSS cache speed: 0.320427
Iter 8/10: ladvise speed: 0.382567
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.351763
Iter 9/10: OSS cache speed: 0.321946
Iter 9/10: ladvise speed: 0.358897
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.356117
Iter 10/10: OSS cache speed: 0.367336
Iter 10/10: ladvise speed: 0.363851
Average uncached read: .34
Average speedup with OSS cached read:  .33 = +-2%
Average speedup with ladvise willread:  .34 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0