== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:54:45 (1782244485)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0034 s, 7.5 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-ffff8dcb82e05000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.335723
Iter 1/10: OSS cache speed: 0.357068
Iter 1/10: ladvise speed: 0.335021
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.298208
Iter 2/10: OSS cache speed: 0.339238
Iter 2/10: ladvise speed: 0.37339
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.323821
Iter 3/10: OSS cache speed: 0.352438
Iter 3/10: ladvise speed: 0.396399
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.33482
Iter 4/10: OSS cache speed: 0.318094
Iter 4/10: ladvise speed: 0.342694
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332022
Iter 5/10: OSS cache speed: 0.421354
Iter 5/10: ladvise speed: 0.419004
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356063
Iter 6/10: OSS cache speed: 0.354425
Iter 6/10: ladvise speed: 0.34181
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.369987
Iter 7/10: OSS cache speed: 0.41949
Iter 7/10: ladvise speed: 0.373217
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.373298
Iter 8/10: OSS cache speed: 0.446037
Iter 8/10: ladvise speed: 0.382609
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377107
Iter 9/10: OSS cache speed: 0.378581
Iter 9/10: ladvise speed: 0.39673
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.331992
Iter 10/10: OSS cache speed: 0.263313
Iter 10/10: ladvise speed: 0.350051
Average uncached read: .34
Average speedup with OSS cached read:  .36 = +5%
Average speedup with ladvise willread:  .37 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0