== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:43:12 (1734676992)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.82494 s, 37.1 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-ffff8800b5869800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.65518
Iter 1/10: OSS cache speed: 1.64432
Iter 1/10: ladvise speed: 1.73081
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.57587
Iter 2/10: OSS cache speed: 1.41135
Iter 2/10: ladvise speed: 1.80451
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.13502
Iter 3/10: OSS cache speed: 1.0404
Iter 3/10: ladvise speed: 0.979249
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.02729
Iter 4/10: OSS cache speed: 0.944518
Iter 4/10: ladvise speed: 1.04554
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.886847
Iter 5/10: OSS cache speed: 0.90385
Iter 5/10: ladvise speed: 0.84795
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.864324
Iter 6/10: OSS cache speed: 0.81706
Iter 6/10: ladvise speed: 0.920155
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.01988
Iter 7/10: OSS cache speed: 1.00353
Iter 7/10: ladvise speed: 0.89006
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.917757
Iter 8/10: OSS cache speed: 0.943976
Iter 8/10: ladvise speed: 0.95593
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.915262
Iter 9/10: OSS cache speed: 0.950045
Iter 9/10: ladvise speed: 0.85832
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.841526
Iter 10/10: OSS cache speed: 0.813044
Iter 10/10: ladvise speed: 1.00704
Average uncached read: 1.08
Average speedup with OSS cached read:  1.04 = +-3%
Average speedup with ladvise willread:  1.10 = +1%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0