== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:24:10 (1746134650)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.99833 s, 26.2 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-ffff8800b36d1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.961722
Iter 1/10: OSS cache speed: 0.99322
Iter 1/10: ladvise speed: 1.03449
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.0419
Iter 2/10: OSS cache speed: 0.939123
Iter 2/10: ladvise speed: 0.976965
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.978858
Iter 3/10: OSS cache speed: 0.880448
Iter 3/10: ladvise speed: 0.921141
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.856802
Iter 4/10: OSS cache speed: 0.919056
Iter 4/10: ladvise speed: 0.85062
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.857786
Iter 5/10: OSS cache speed: 0.912514
Iter 5/10: ladvise speed: 0.90065
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.853283
Iter 6/10: OSS cache speed: 0.825081
Iter 6/10: ladvise speed: 0.911658
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.972769
Iter 7/10: OSS cache speed: 1.03626
Iter 7/10: ladvise speed: 0.852584
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.879973
Iter 8/10: OSS cache speed: 0.978514
Iter 8/10: ladvise speed: 1.03381
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.871397
Iter 9/10: OSS cache speed: 0.995569
Iter 9/10: ladvise speed: 0.946641
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.0261
Iter 10/10: OSS cache speed: 0.941689
Iter 10/10: ladvise speed: 1.00718
Average uncached read: .93
Average speedup with OSS cached read:  .94 = +1%
Average speedup with ladvise willread:  .94 = +1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0