== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:37:52 (1786811872)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4232 s, 8.4 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-ffff9ab2503de000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.472452
Iter 1/10: OSS cache speed: 0.380948
Iter 1/10: ladvise speed: 0.403764
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.39089
Iter 2/10: OSS cache speed: 0.402042
Iter 2/10: ladvise speed: 0.400673
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.397084
Iter 3/10: OSS cache speed: 0.516206
Iter 3/10: ladvise speed: 0.502987
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.409212
Iter 4/10: OSS cache speed: 0.496956
Iter 4/10: ladvise speed: 0.422391
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.376373
Iter 5/10: OSS cache speed: 0.373177
Iter 5/10: ladvise speed: 0.371184
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.394148
Iter 6/10: OSS cache speed: 0.368122
Iter 6/10: ladvise speed: 0.467728
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.370321
Iter 7/10: OSS cache speed: 0.437335
Iter 7/10: ladvise speed: 0.472462
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.324289
Iter 8/10: OSS cache speed: 0.390506
Iter 8/10: ladvise speed: 0.376944
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.319482
Iter 9/10: OSS cache speed: 0.383483
Iter 9/10: ladvise speed: 0.489599
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.381966
Iter 10/10: OSS cache speed: 0.400238
Iter 10/10: ladvise speed: 0.445337
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .43 = +13%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0