== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:28:50 (1787462930)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.3097 s, 7.9 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-ffff9e3a491cf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369848
Iter 1/10: OSS cache speed: 0.35258
Iter 1/10: ladvise speed: 0.338011
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316139
Iter 2/10: OSS cache speed: 0.353709
Iter 2/10: ladvise speed: 0.356936
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.363738
Iter 3/10: OSS cache speed: 0.386432
Iter 3/10: ladvise speed: 0.329078
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.320813
Iter 4/10: OSS cache speed: 0.304517
Iter 4/10: ladvise speed: 0.320416
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.268171
Iter 5/10: OSS cache speed: 0.34081
Iter 5/10: ladvise speed: 0.361372
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.385231
Iter 6/10: OSS cache speed: 0.337438
Iter 6/10: ladvise speed: 0.31757
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.321661
Iter 7/10: OSS cache speed: 0.321155
Iter 7/10: ladvise speed: 0.323468
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.260577
Iter 8/10: OSS cache speed: 0.273563
Iter 8/10: ladvise speed: 0.274606
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.279781
Iter 9/10: OSS cache speed: 0.273058
Iter 9/10: ladvise speed: 0.293602
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.251039
Iter 10/10: OSS cache speed: 0.282252
Iter 10/10: ladvise speed: 0.262116
Average uncached read: .31
Average speedup with OSS cached read:  .32 = +3%
Average speedup with ladvise willread:  .31 = +0%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0