== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:40:36 (1787856036)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8016 s, 8.2 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-ffff9bb210a29000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.350895
Iter 1/10: OSS cache speed: 0.367434
Iter 1/10: ladvise speed: 0.337433
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.356842
Iter 2/10: OSS cache speed: 0.351636
Iter 2/10: ladvise speed: 0.342014
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.333746
Iter 3/10: OSS cache speed: 0.373177
Iter 3/10: ladvise speed: 0.336661
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.389527
Iter 4/10: OSS cache speed: 0.365114
Iter 4/10: ladvise speed: 0.319598
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.354715
Iter 5/10: OSS cache speed: 0.346257
Iter 5/10: ladvise speed: 0.395127
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.351209
Iter 6/10: OSS cache speed: 0.381353
Iter 6/10: ladvise speed: 0.363608
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.342113
Iter 7/10: OSS cache speed: 0.378141
Iter 7/10: ladvise speed: 0.418605
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.330018
Iter 8/10: OSS cache speed: 0.412304
Iter 8/10: ladvise speed: 0.35563
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.371271
Iter 9/10: OSS cache speed: 0.363704
Iter 9/10: ladvise speed: 0.289851
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.280954
Iter 10/10: OSS cache speed: 0.357775
Iter 10/10: ladvise speed: 0.352946
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .35 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0