== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:09:24 (1789787364)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4885 s, 7.8 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-ffff8f5a106cf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.393625
Iter 1/10: OSS cache speed: 0.46049
Iter 1/10: ladvise speed: 0.378025
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.465133
Iter 2/10: OSS cache speed: 0.525698
Iter 2/10: ladvise speed: 0.450375
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.492362
Iter 3/10: OSS cache speed: 0.401598
Iter 3/10: ladvise speed: 0.4644
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.482437
Iter 4/10: OSS cache speed: 0.471336
Iter 4/10: ladvise speed: 0.512245
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.484018
Iter 5/10: OSS cache speed: 0.482786
Iter 5/10: ladvise speed: 0.490547
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.40103
Iter 6/10: OSS cache speed: 0.452127
Iter 6/10: ladvise speed: 0.413924
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.482609
Iter 7/10: OSS cache speed: 0.460358
Iter 7/10: ladvise speed: 0.484722
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.547339
Iter 8/10: OSS cache speed: 0.501407
Iter 8/10: ladvise speed: 0.519447
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.49774
Iter 9/10: OSS cache speed: 0.55709
Iter 9/10: ladvise speed: 0.53816
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.470941
Iter 10/10: OSS cache speed: 0.53233
Iter 10/10: ladvise speed: 0.556817
Average uncached read: .47
Average speedup with OSS cached read:  .48 = +2%
Average speedup with ladvise willread:  .48 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0