== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:26:26 (1786839986)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.6057 s, 15.9 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-ffffa0ed05487000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.10828
Iter 1/10: OSS cache speed: 2.24427
Iter 1/10: ladvise speed: 2.36097
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.2183
Iter 2/10: OSS cache speed: 2.39353
Iter 2/10: ladvise speed: 2.42267
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.14033
Iter 3/10: OSS cache speed: 2.25747
Iter 3/10: ladvise speed: 2.37449
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.162
Iter 4/10: OSS cache speed: 2.35646
Iter 4/10: ladvise speed: 2.30303
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.24577
Iter 5/10: OSS cache speed: 2.37823
Iter 5/10: ladvise speed: 2.20646
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.10974
Iter 6/10: OSS cache speed: 2.03525
Iter 6/10: ladvise speed: 2.28576
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.27677
Iter 7/10: OSS cache speed: 2.38106
Iter 7/10: ladvise speed: 2.37666
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09659
Iter 8/10: OSS cache speed: 2.04804
Iter 8/10: ladvise speed: 2.15791
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.73276
Iter 9/10: OSS cache speed: 1.5323
Iter 9/10: ladvise speed: 1.52259
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.82471
Iter 10/10: OSS cache speed: 2.24797
Iter 10/10: ladvise speed: 1.44747
Average uncached read: 2.09
Average speedup with OSS cached read:  2.18 = +4%
Average speedup with ladvise willread:  2.14 = +2%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0