== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:34:15 (1781210055)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.3068 s, 6.4 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-ffff88ac0bd30000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.454123
Iter 1/10: OSS cache speed: 0.42419
Iter 1/10: ladvise speed: 0.382271
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.300161
Iter 2/10: OSS cache speed: 0.272439
Iter 2/10: ladvise speed: 0.317498
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.351013
Iter 3/10: OSS cache speed: 0.399943
Iter 3/10: ladvise speed: 0.444733
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.324259
Iter 4/10: OSS cache speed: 0.282991
Iter 4/10: ladvise speed: 0.42702
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.405831
Iter 5/10: OSS cache speed: 0.435663
Iter 5/10: ladvise speed: 0.392113
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329425
Iter 6/10: OSS cache speed: 0.311775
Iter 6/10: ladvise speed: 0.300125
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.328011
Iter 7/10: OSS cache speed: 0.473683
Iter 7/10: ladvise speed: 0.411194
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.304733
Iter 8/10: OSS cache speed: 0.318642
Iter 8/10: ladvise speed: 0.339013
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.355587
Iter 9/10: OSS cache speed: 0.334519
Iter 9/10: ladvise speed: 0.307926
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.301351
Iter 10/10: OSS cache speed: 0.356147
Iter 10/10: ladvise speed: 0.354121
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .36 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0