== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:33:28 (1786030408)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.679 s, 7.7 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-ffff9d54c5329000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.341109
Iter 1/10: OSS cache speed: 0.382747
Iter 1/10: ladvise speed: 0.376261
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.395265
Iter 2/10: OSS cache speed: 0.420551
Iter 2/10: ladvise speed: 0.329668
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301725
Iter 3/10: OSS cache speed: 0.319357
Iter 3/10: ladvise speed: 0.363614
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.332165
Iter 4/10: OSS cache speed: 0.360744
Iter 4/10: ladvise speed: 0.378079
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.305959
Iter 5/10: OSS cache speed: 0.369582
Iter 5/10: ladvise speed: 0.340552
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.401221
Iter 6/10: OSS cache speed: 0.394515
Iter 6/10: ladvise speed: 0.357493
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.362602
Iter 7/10: OSS cache speed: 0.372315
Iter 7/10: ladvise speed: 0.368179
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.441159
Iter 8/10: OSS cache speed: 0.38637
Iter 8/10: ladvise speed: 0.32614
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.321427
Iter 9/10: OSS cache speed: 0.370385
Iter 9/10: ladvise speed: 0.413323
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.339774
Iter 10/10: OSS cache speed: 0.325086
Iter 10/10: ladvise speed: 0.415236
Average uncached read: .35
Average speedup with OSS cached read:  .37 = +5%
Average speedup with ladvise willread:  .36 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0