== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:10:11 (1787850611)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4491 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-ffff9cf510fa8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.294663
Iter 1/10: OSS cache speed: 0.369969
Iter 1/10: ladvise speed: 0.33033
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327646
Iter 2/10: OSS cache speed: 0.380511
Iter 2/10: ladvise speed: 0.423515
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.356997
Iter 3/10: OSS cache speed: 0.391271
Iter 3/10: ladvise speed: 0.329241
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.286137
Iter 4/10: OSS cache speed: 0.371769
Iter 4/10: ladvise speed: 0.363564
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.350356
Iter 5/10: OSS cache speed: 0.368789
Iter 5/10: ladvise speed: 0.329407
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.303426
Iter 6/10: OSS cache speed: 0.308583
Iter 6/10: ladvise speed: 0.378176
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.31166
Iter 7/10: OSS cache speed: 0.380158
Iter 7/10: ladvise speed: 0.343465
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.272758
Iter 8/10: OSS cache speed: 0.317436
Iter 8/10: ladvise speed: 0.322918
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.29599
Iter 9/10: OSS cache speed: 0.312061
Iter 9/10: ladvise speed: 0.322679
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.344974
Iter 10/10: OSS cache speed: 0.327407
Iter 10/10: ladvise speed: 0.340069
Average uncached read: .31
Average speedup with OSS cached read:  .35 = +12%
Average speedup with ladvise willread:  .34 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0