== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:34:47 (1786566887)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6695 s, 9.0 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-ffff8f0f861df800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.363783
Iter 1/10: OSS cache speed: 0.339793
Iter 1/10: ladvise speed: 0.337625
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.379207
Iter 2/10: OSS cache speed: 0.39527
Iter 2/10: ladvise speed: 0.403567
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.295994
Iter 3/10: OSS cache speed: 0.386735
Iter 3/10: ladvise speed: 0.380356
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.368362
Iter 4/10: OSS cache speed: 0.397743
Iter 4/10: ladvise speed: 0.368175
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.394583
Iter 5/10: OSS cache speed: 0.340429
Iter 5/10: ladvise speed: 0.353179
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394385
Iter 6/10: OSS cache speed: 0.357319
Iter 6/10: ladvise speed: 0.390652
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.330531
Iter 7/10: OSS cache speed: 0.388128
Iter 7/10: ladvise speed: 0.420349
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.437882
Iter 8/10: OSS cache speed: 0.482001
Iter 8/10: ladvise speed: 0.522807
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.482916
Iter 9/10: OSS cache speed: 0.52341
Iter 9/10: ladvise speed: 0.490893
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.402004
Iter 10/10: OSS cache speed: 0.507815
Iter 10/10: ladvise speed: 0.531854
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0