== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:44:04 (1785948244)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 20.89 s, 5.0 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-ffff9644d08f2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.248899
Iter 1/10: OSS cache speed: 0.217038
Iter 1/10: ladvise speed: 0.25115
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.222367
Iter 2/10: OSS cache speed: 0.234433
Iter 2/10: ladvise speed: 0.199563
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.222221
Iter 3/10: OSS cache speed: 0.25501
Iter 3/10: ladvise speed: 0.248942
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.279752
Iter 4/10: OSS cache speed: 0.22766
Iter 4/10: ladvise speed: 0.235663
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.264273
Iter 5/10: OSS cache speed: 0.284753
Iter 5/10: ladvise speed: 0.221346
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.263583
Iter 6/10: OSS cache speed: 0.258377
Iter 6/10: ladvise speed: 0.263481
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.209398
Iter 7/10: OSS cache speed: 0.212539
Iter 7/10: ladvise speed: 0.232256
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.255697
Iter 8/10: OSS cache speed: 0.275031
Iter 8/10: ladvise speed: 0.222992
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.226212
Iter 9/10: OSS cache speed: 0.278394
Iter 9/10: ladvise speed: 0.243075
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.242999
Iter 10/10: OSS cache speed: 0.246447
Iter 10/10: ladvise speed: 0.250756
Average uncached read: .24
Average speedup with OSS cached read:  .24 = +0%
Average speedup with ladvise willread:  .23 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0