== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:23:03 (1779312183)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.65676 s, 13.7 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-ffff922c10784000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.473608
Iter 1/10: OSS cache speed: 0.297539
Iter 1/10: ladvise speed: 0.363867
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427534
Iter 2/10: OSS cache speed: 0.348867
Iter 2/10: ladvise speed: 0.338334
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.44942
Iter 3/10: OSS cache speed: 0.43052
Iter 3/10: ladvise speed: 0.421611
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.440829
Iter 4/10: OSS cache speed: 0.452534
Iter 4/10: ladvise speed: 0.45579
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.466345
Iter 5/10: OSS cache speed: 0.503634
Iter 5/10: ladvise speed: 0.52458
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.524949
Iter 6/10: OSS cache speed: 0.496041
Iter 6/10: ladvise speed: 0.466901
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.449833
Iter 7/10: OSS cache speed: 0.452145
Iter 7/10: ladvise speed: 0.388816
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.415864
Iter 8/10: OSS cache speed: 0.481997
Iter 8/10: ladvise speed: 0.41285
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.366659
Iter 9/10: OSS cache speed: 0.420978
Iter 9/10: ladvise speed: 0.487112
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.435616
Iter 10/10: OSS cache speed: 0.482147
Iter 10/10: ladvise speed: 0.466758
Average uncached read: .44
Average speedup with OSS cached read:  .43 = +-2%
Average speedup with ladvise willread:  .43 = +-2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0