== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:20:11 (1786371611)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.6233 s, 15.8 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-ffff9fe98a2db800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.531816
Iter 1/10: OSS cache speed: 0.653645
Iter 1/10: ladvise speed: 0.679126
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.629915
Iter 2/10: OSS cache speed: 0.691353
Iter 2/10: ladvise speed: 0.709225
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.649735
Iter 3/10: OSS cache speed: 0.745928
Iter 3/10: ladvise speed: 0.941084
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.894694
Iter 4/10: OSS cache speed: 1.03521
Iter 4/10: ladvise speed: 1.29054
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.19927
Iter 5/10: OSS cache speed: 1.46213
Iter 5/10: ladvise speed: 1.44673
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.53465
Iter 6/10: OSS cache speed: 1.37924
Iter 6/10: ladvise speed: 1.40219
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.679561
Iter 7/10: OSS cache speed: 0.85431
Iter 7/10: ladvise speed: 0.905587
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.824425
Iter 8/10: OSS cache speed: 1.04237
Iter 8/10: ladvise speed: 1.05553
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.921327
Iter 9/10: OSS cache speed: 1.18891
Iter 9/10: ladvise speed: 1.36345
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.46192
Iter 10/10: OSS cache speed: 1.10344
Iter 10/10: ladvise speed: 0.999197
Average uncached read: .93
Average speedup with OSS cached read:  1.01 = +8%
Average speedup with ladvise willread:  1.07 = +15%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0