== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:23:10 (1752477790)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4042 s, 10.1 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-ffff9d15033ab000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.420237
Iter 1/10: OSS cache speed: 0.4909
Iter 1/10: ladvise speed: 0.576702
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.473598
Iter 2/10: OSS cache speed: 0.549207
Iter 2/10: ladvise speed: 0.520312
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.50569
Iter 3/10: OSS cache speed: 0.611218
Iter 3/10: ladvise speed: 0.609352
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.552136
Iter 4/10: OSS cache speed: 0.639882
Iter 4/10: ladvise speed: 0.544791
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.519356
Iter 5/10: OSS cache speed: 0.544864
Iter 5/10: ladvise speed: 0.509486
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393034
Iter 6/10: OSS cache speed: 0.475011
Iter 6/10: ladvise speed: 0.480647
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.371114
Iter 7/10: OSS cache speed: 0.419914
Iter 7/10: ladvise speed: 0.39502
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.436144
Iter 8/10: OSS cache speed: 0.566395
Iter 8/10: ladvise speed: 0.567384
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.474543
Iter 9/10: OSS cache speed: 0.528116
Iter 9/10: ladvise speed: 0.572366
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.428998
Iter 10/10: OSS cache speed: 0.539687
Iter 10/10: ladvise speed: 0.466107
Average uncached read: .45
Average speedup with OSS cached read:  .53 = +17%
Average speedup with ladvise willread:  .52 = +15%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0