== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:21:05 (1779096065)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4419 s, 8.4 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-ffff9c3711257800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.323069
Iter 1/10: OSS cache speed: 0.307276
Iter 1/10: ladvise speed: 0.314604
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.366231
Iter 2/10: OSS cache speed: 0.311958
Iter 2/10: ladvise speed: 0.393286
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.325401
Iter 3/10: OSS cache speed: 0.36123
Iter 3/10: ladvise speed: 0.332011
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.365719
Iter 4/10: OSS cache speed: 0.377986
Iter 4/10: ladvise speed: 0.421459
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.337623
Iter 5/10: OSS cache speed: 0.377342
Iter 5/10: ladvise speed: 0.340861
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356132
Iter 6/10: OSS cache speed: 0.36267
Iter 6/10: ladvise speed: 0.347351
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.294476
Iter 7/10: OSS cache speed: 0.34803
Iter 7/10: ladvise speed: 0.337128
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.251796
Iter 8/10: OSS cache speed: 0.333867
Iter 8/10: ladvise speed: 0.384891
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.318156
Iter 9/10: OSS cache speed: 0.359257
Iter 9/10: ladvise speed: 0.304683
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.220566
Iter 10/10: OSS cache speed: 0.291186
Iter 10/10: ladvise speed: 0.321772
Average uncached read: .31
Average speedup with OSS cached read:  .34 = +9%
Average speedup with ladvise willread:  .34 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0