== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:32:52 (1752478372)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1652 s, 8.6 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-ffff919543896800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.371021
Iter 1/10: OSS cache speed: 0.39424
Iter 1/10: ladvise speed: 0.433358
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.401537
Iter 2/10: OSS cache speed: 0.394795
Iter 2/10: ladvise speed: 0.357881
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.370304
Iter 3/10: OSS cache speed: 0.359857
Iter 3/10: ladvise speed: 0.417386
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338678
Iter 4/10: OSS cache speed: 0.392562
Iter 4/10: ladvise speed: 0.370908
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.323125
Iter 5/10: OSS cache speed: 0.351526
Iter 5/10: ladvise speed: 0.320633
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342912
Iter 6/10: OSS cache speed: 0.393937
Iter 6/10: ladvise speed: 0.364407
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.341757
Iter 7/10: OSS cache speed: 0.383693
Iter 7/10: ladvise speed: 0.36374
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.348862
Iter 8/10: OSS cache speed: 0.406087
Iter 8/10: ladvise speed: 0.352545
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.366789
Iter 9/10: OSS cache speed: 0.361502
Iter 9/10: ladvise speed: 0.347558
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.355098
Iter 10/10: OSS cache speed: 0.359136
Iter 10/10: ladvise speed: 0.402852
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .37 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0