== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:41:05 (1787035265)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.637 s, 9.0 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-ffff90b786500000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.397552
Iter 1/10: OSS cache speed: 0.383335
Iter 1/10: ladvise speed: 0.363267
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392045
Iter 2/10: OSS cache speed: 0.359242
Iter 2/10: ladvise speed: 0.382997
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.330073
Iter 3/10: OSS cache speed: 0.3615
Iter 3/10: ladvise speed: 0.346496
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.388284
Iter 4/10: OSS cache speed: 0.372591
Iter 4/10: ladvise speed: 0.338422
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403908
Iter 5/10: OSS cache speed: 0.409557
Iter 5/10: ladvise speed: 0.385157
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.292917
Iter 6/10: OSS cache speed: 0.404802
Iter 6/10: ladvise speed: 0.389223
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.340704
Iter 7/10: OSS cache speed: 0.348779
Iter 7/10: ladvise speed: 0.386162
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.371032
Iter 8/10: OSS cache speed: 0.428036
Iter 8/10: ladvise speed: 0.411027
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.340003
Iter 9/10: OSS cache speed: 0.393344
Iter 9/10: ladvise speed: 0.305853
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.376172
Iter 10/10: OSS cache speed: 0.361397
Iter 10/10: ladvise speed: 0.400427
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0