== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:59:50 (1787601590)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6111 s, 8.3 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-ffff9a63915e2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.329167
Iter 1/10: OSS cache speed: 0.450065
Iter 1/10: ladvise speed: 0.31587
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.369396
Iter 2/10: OSS cache speed: 0.423999
Iter 2/10: ladvise speed: 0.406112
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.333386
Iter 3/10: OSS cache speed: 0.331615
Iter 3/10: ladvise speed: 0.342297
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.339633
Iter 4/10: OSS cache speed: 0.357948
Iter 4/10: ladvise speed: 0.341538
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.33478
Iter 5/10: OSS cache speed: 0.369471
Iter 5/10: ladvise speed: 0.429448
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370925
Iter 6/10: OSS cache speed: 0.379524
Iter 6/10: ladvise speed: 0.451738
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.421891
Iter 7/10: OSS cache speed: 0.441186
Iter 7/10: ladvise speed: 0.405378
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.39403
Iter 8/10: OSS cache speed: 0.342458
Iter 8/10: ladvise speed: 0.369278
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.389899
Iter 9/10: OSS cache speed: 0.420954
Iter 9/10: ladvise speed: 0.409583
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.364557
Iter 10/10: OSS cache speed: 0.391941
Iter 10/10: ladvise speed: 0.375293
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0