== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:18:33 (1764735513)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.51751 s, 16.1 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-ffff97fc46128800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.02634
Iter 1/10: OSS cache speed: 1.55158
Iter 1/10: ladvise speed: 1.21199
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.43033
Iter 2/10: OSS cache speed: 1.44221
Iter 2/10: ladvise speed: 1.75887
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11998
Iter 3/10: OSS cache speed: 2.11247
Iter 3/10: ladvise speed: 2.13827
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.763607
Iter 4/10: OSS cache speed: 0.552782
Iter 4/10: ladvise speed: 0.665021
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.611842
Iter 5/10: OSS cache speed: 0.5815
Iter 5/10: ladvise speed: 0.593461
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.567096
Iter 6/10: OSS cache speed: 0.576464
Iter 6/10: ladvise speed: 0.463497
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.524381
Iter 7/10: OSS cache speed: 0.546429
Iter 7/10: ladvise speed: 0.524799
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.46844
Iter 8/10: OSS cache speed: 0.496253
Iter 8/10: ladvise speed: 0.670066
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.680321
Iter 9/10: OSS cache speed: 0.710636
Iter 9/10: ladvise speed: 0.952418
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.04385
Iter 10/10: OSS cache speed: 0.953969
Iter 10/10: ladvise speed: 1.07823
Average uncached read: .92
Average speedup with OSS cached read:  .95 = +3%
Average speedup with ladvise willread:  1.00 = +8%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0