== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:23:01 (1787833381)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9594 s, 7.0 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-ffff9b1c89117800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.330203
Iter 1/10: OSS cache speed: 0.328065
Iter 1/10: ladvise speed: 0.305848
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.333589
Iter 2/10: OSS cache speed: 0.339433
Iter 2/10: ladvise speed: 0.357797
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.325942
Iter 3/10: OSS cache speed: 0.387016
Iter 3/10: ladvise speed: 0.348239
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.343484
Iter 4/10: OSS cache speed: 0.380439
Iter 4/10: ladvise speed: 0.364766
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.328598
Iter 5/10: OSS cache speed: 0.402732
Iter 5/10: ladvise speed: 0.396691
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.362094
Iter 6/10: OSS cache speed: 0.388981
Iter 6/10: ladvise speed: 0.435249
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.366259
Iter 7/10: OSS cache speed: 0.403688
Iter 7/10: ladvise speed: 0.41274
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.353183
Iter 8/10: OSS cache speed: 0.408618
Iter 8/10: ladvise speed: 0.399117
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.3793
Iter 9/10: OSS cache speed: 0.413251
Iter 9/10: ladvise speed: 0.385892
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.377557
Iter 10/10: OSS cache speed: 0.344917
Iter 10/10: ladvise speed: 0.429831
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .38 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0