== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:40:32 (1768300832)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0914 s, 8.7 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-ffff9afe8553b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.346501
Iter 1/10: OSS cache speed: 0.35442
Iter 1/10: ladvise speed: 0.39914
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.362292
Iter 2/10: OSS cache speed: 0.393271
Iter 2/10: ladvise speed: 0.446481
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.374476
Iter 3/10: OSS cache speed: 0.376637
Iter 3/10: ladvise speed: 0.360601
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.357621
Iter 4/10: OSS cache speed: 0.3815
Iter 4/10: ladvise speed: 0.353459
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.332491
Iter 5/10: OSS cache speed: 0.366499
Iter 5/10: ladvise speed: 0.417177
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.361287
Iter 6/10: OSS cache speed: 0.40514
Iter 6/10: ladvise speed: 0.350715
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385023
Iter 7/10: OSS cache speed: 0.405331
Iter 7/10: ladvise speed: 0.400023
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.374241
Iter 8/10: OSS cache speed: 0.384426
Iter 8/10: ladvise speed: 0.323338
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.343244
Iter 9/10: OSS cache speed: 0.391334
Iter 9/10: ladvise speed: 0.462559
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.398406
Iter 10/10: OSS cache speed: 0.407657
Iter 10/10: ladvise speed: 0.365754
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .38 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0