== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:15:43 (1761239743)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.72118 s, 10.8 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-ffff9a24c8f62800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.453318
Iter 1/10: OSS cache speed: 0.523123
Iter 1/10: ladvise speed: 0.502962
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.512256
Iter 2/10: OSS cache speed: 0.542674
Iter 2/10: ladvise speed: 0.562992
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.490242
Iter 3/10: OSS cache speed: 0.516374
Iter 3/10: ladvise speed: 0.549828
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.508308
Iter 4/10: OSS cache speed: 0.568773
Iter 4/10: ladvise speed: 0.545666
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.43099
Iter 5/10: OSS cache speed: 0.468686
Iter 5/10: ladvise speed: 0.510384
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.471503
Iter 6/10: OSS cache speed: 0.567467
Iter 6/10: ladvise speed: 0.545311
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.509112
Iter 7/10: OSS cache speed: 0.608505
Iter 7/10: ladvise speed: 0.576982
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.501704
Iter 8/10: OSS cache speed: 0.587555
Iter 8/10: ladvise speed: 0.620287
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.523628
Iter 9/10: OSS cache speed: 0.558267
Iter 9/10: ladvise speed: 0.496201
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.509225
Iter 10/10: OSS cache speed: 0.542574
Iter 10/10: ladvise speed: 0.529354
Average uncached read: .49
Average speedup with OSS cached read:  .54 = +10%
Average speedup with ladvise willread:  .54 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0