== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:28:44 (1781213324)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2244 s, 7.9 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-ffff8e0cd3072800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.316988
Iter 1/10: OSS cache speed: 0.381748
Iter 1/10: ladvise speed: 0.324254
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.287019
Iter 2/10: OSS cache speed: 0.358379
Iter 2/10: ladvise speed: 0.33304
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.247964
Iter 3/10: OSS cache speed: 0.3756
Iter 3/10: ladvise speed: 0.371152
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355295
Iter 4/10: OSS cache speed: 0.306492
Iter 4/10: ladvise speed: 0.293954
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.333985
Iter 5/10: OSS cache speed: 0.332015
Iter 5/10: ladvise speed: 0.2656
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.340335
Iter 6/10: OSS cache speed: 0.324161
Iter 6/10: ladvise speed: 0.312797
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.263965
Iter 7/10: OSS cache speed: 0.272195
Iter 7/10: ladvise speed: 0.310688
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.258679
Iter 8/10: OSS cache speed: 0.357798
Iter 8/10: ladvise speed: 0.35593
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.265228
Iter 9/10: OSS cache speed: 0.276063
Iter 9/10: ladvise speed: 0.292912
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.24515
Iter 10/10: OSS cache speed: 0.255411
Iter 10/10: ladvise speed: 0.301082
Average uncached read: .29
Average speedup with OSS cached read:  .32 = +10%
Average speedup with ladvise willread:  .31 = +6%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0