== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:25:16 (1787700316)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5271 s, 9.1 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-ffff91a7468b4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.322372
Iter 1/10: OSS cache speed: 0.298744
Iter 1/10: ladvise speed: 0.33238
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.355209
Iter 2/10: OSS cache speed: 0.420733
Iter 2/10: ladvise speed: 0.393478
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.363196
Iter 3/10: OSS cache speed: 0.407467
Iter 3/10: ladvise speed: 0.416376
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.414773
Iter 4/10: OSS cache speed: 0.429193
Iter 4/10: ladvise speed: 0.41458
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.413032
Iter 5/10: OSS cache speed: 0.431784
Iter 5/10: ladvise speed: 0.393901
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.406844
Iter 6/10: OSS cache speed: 0.408565
Iter 6/10: ladvise speed: 0.420645
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.386479
Iter 7/10: OSS cache speed: 0.37307
Iter 7/10: ladvise speed: 0.365106
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.376175
Iter 8/10: OSS cache speed: 0.410914
Iter 8/10: ladvise speed: 0.432457
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.353814
Iter 9/10: OSS cache speed: 0.381977
Iter 9/10: ladvise speed: 0.411874
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.402562
Iter 10/10: OSS cache speed: 0.434472
Iter 10/10: ladvise speed: 0.335715
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0