== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:36:10 (1773606970)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.3204 s, 5.4 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-ffff9654064b0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.23784
Iter 1/10: OSS cache speed: 0.255829
Iter 1/10: ladvise speed: 0.253853
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.235141
Iter 2/10: OSS cache speed: 0.252951
Iter 2/10: ladvise speed: 0.266113
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.264258
Iter 3/10: OSS cache speed: 0.299582
Iter 3/10: ladvise speed: 0.240935
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.254324
Iter 4/10: OSS cache speed: 0.258731
Iter 4/10: ladvise speed: 0.221138
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.201043
Iter 5/10: OSS cache speed: 0.272181
Iter 5/10: ladvise speed: 0.277159
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.246281
Iter 6/10: OSS cache speed: 0.251405
Iter 6/10: ladvise speed: 0.257673
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.208683
Iter 7/10: OSS cache speed: 0.257552
Iter 7/10: ladvise speed: 0.244527
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.260404
Iter 8/10: OSS cache speed: 0.305521
Iter 8/10: ladvise speed: 0.249902
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.248978
Iter 9/10: OSS cache speed: 0.244915
Iter 9/10: ladvise speed: 0.220996
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.249372
Iter 10/10: OSS cache speed: 0.256955
Iter 10/10: ladvise speed: 0.265209
Average uncached read: .24
Average speedup with OSS cached read:  .26 = +8%
Average speedup with ladvise willread:  .24 = +0%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0