== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:49:28 (1787111368)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9803 s, 8.1 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-ffff893a90495000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.321822
Iter 1/10: OSS cache speed: 0.295473
Iter 1/10: ladvise speed: 0.392279
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.322297
Iter 2/10: OSS cache speed: 0.362134
Iter 2/10: ladvise speed: 0.403038
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.367943
Iter 3/10: OSS cache speed: 0.34748
Iter 3/10: ladvise speed: 0.373714
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.354427
Iter 4/10: OSS cache speed: 0.397721
Iter 4/10: ladvise speed: 0.369455
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341412
Iter 5/10: OSS cache speed: 0.362615
Iter 5/10: ladvise speed: 0.386645
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.338429
Iter 6/10: OSS cache speed: 0.411732
Iter 6/10: ladvise speed: 0.383003
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.355397
Iter 7/10: OSS cache speed: 0.429935
Iter 7/10: ladvise speed: 0.364525
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.336542
Iter 8/10: OSS cache speed: 0.336872
Iter 8/10: ladvise speed: 0.35716
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.289605
Iter 9/10: OSS cache speed: 0.306109
Iter 9/10: ladvise speed: 0.313739
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.339375
Iter 10/10: OSS cache speed: 0.355968
Iter 10/10: ladvise speed: 0.30073
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .36 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0