== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:35:26 (1761237326)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.36147 s, 12.5 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-ffff97ac87312800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.443999
Iter 1/10: OSS cache speed: 0.496852
Iter 1/10: ladvise speed: 0.519236
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.36378
Iter 2/10: OSS cache speed: 0.424203
Iter 2/10: ladvise speed: 0.413565
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.382852
Iter 3/10: OSS cache speed: 0.386889
Iter 3/10: ladvise speed: 0.431572
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.384813
Iter 4/10: OSS cache speed: 0.432674
Iter 4/10: ladvise speed: 0.483993
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.454267
Iter 5/10: OSS cache speed: 0.552261
Iter 5/10: ladvise speed: 0.491131
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.433242
Iter 6/10: OSS cache speed: 0.460047
Iter 6/10: ladvise speed: 0.483361
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.446642
Iter 7/10: OSS cache speed: 0.505742
Iter 7/10: ladvise speed: 0.501799
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.479587
Iter 8/10: OSS cache speed: 0.490518
Iter 8/10: ladvise speed: 0.524668
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.439053
Iter 9/10: OSS cache speed: 0.504069
Iter 9/10: ladvise speed: 0.528857
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.469901
Iter 10/10: OSS cache speed: 0.509686
Iter 10/10: ladvise speed: 0.513124
Average uncached read: .42
Average speedup with OSS cached read:  .47 = +11%
Average speedup with ladvise willread:  .48 = +14%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0