== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:52:27 (1762491147)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.3763 s, 10.1 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-ffff9693cb0a6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.399005
Iter 1/10: OSS cache speed: 0.377665
Iter 1/10: ladvise speed: 0.362939
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.411004
Iter 2/10: OSS cache speed: 0.439815
Iter 2/10: ladvise speed: 0.361517
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394496
Iter 3/10: OSS cache speed: 0.407045
Iter 3/10: ladvise speed: 0.411438
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.487053
Iter 4/10: OSS cache speed: 0.436036
Iter 4/10: ladvise speed: 0.419914
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.377145
Iter 5/10: OSS cache speed: 0.379551
Iter 5/10: ladvise speed: 0.448318
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.380859
Iter 6/10: OSS cache speed: 0.342915
Iter 6/10: ladvise speed: 0.308767
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376012
Iter 7/10: OSS cache speed: 0.402363
Iter 7/10: ladvise speed: 0.429749
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.412279
Iter 8/10: OSS cache speed: 0.422037
Iter 8/10: ladvise speed: 0.412202
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405843
Iter 9/10: OSS cache speed: 0.393783
Iter 9/10: ladvise speed: 0.389255
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.391005
Iter 10/10: OSS cache speed: 0.451856
Iter 10/10: ladvise speed: 0.422377
Average uncached read: .40
Average speedup with OSS cached read:  .40 = +0%
Average speedup with ladvise willread:  .39 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0