== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:34:20 (1788755660)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2082 s, 8.6 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-ffff8d7983114800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.381976
Iter 1/10: OSS cache speed: 0.418072
Iter 1/10: ladvise speed: 0.436524
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.412484
Iter 2/10: OSS cache speed: 0.419585
Iter 2/10: ladvise speed: 0.390039
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.412734
Iter 3/10: OSS cache speed: 0.385556
Iter 3/10: ladvise speed: 0.451411
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.356786
Iter 4/10: OSS cache speed: 0.439992
Iter 4/10: ladvise speed: 0.362019
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.440778
Iter 5/10: OSS cache speed: 0.456281
Iter 5/10: ladvise speed: 0.397989
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.393672
Iter 6/10: OSS cache speed: 0.384229
Iter 6/10: ladvise speed: 0.397061
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.307497
Iter 7/10: OSS cache speed: 0.261052
Iter 7/10: ladvise speed: 0.386055
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.307477
Iter 8/10: OSS cache speed: 0.361545
Iter 8/10: ladvise speed: 0.337267
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.307708
Iter 9/10: OSS cache speed: 0.386101
Iter 9/10: ladvise speed: 0.362323
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.319687
Iter 10/10: OSS cache speed: 0.39606
Iter 10/10: ladvise speed: 0.43818
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0