== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:31:31 (1781209891)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6638 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-ffff9dcb461c6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.349707
Iter 1/10: OSS cache speed: 0.340564
Iter 1/10: ladvise speed: 0.371003
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.356122
Iter 2/10: OSS cache speed: 0.382177
Iter 2/10: ladvise speed: 0.299034
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.324453
Iter 3/10: OSS cache speed: 0.333416
Iter 3/10: ladvise speed: 0.370271
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.338424
Iter 4/10: OSS cache speed: 0.359572
Iter 4/10: ladvise speed: 0.344158
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.302996
Iter 5/10: OSS cache speed: 0.33096
Iter 5/10: ladvise speed: 0.343474
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.352553
Iter 6/10: OSS cache speed: 0.28679
Iter 6/10: ladvise speed: 0.38123
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.331722
Iter 7/10: OSS cache speed: 0.3435
Iter 7/10: ladvise speed: 0.314263
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342002
Iter 8/10: OSS cache speed: 0.354434
Iter 8/10: ladvise speed: 0.380645
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.332619
Iter 9/10: OSS cache speed: 0.339768
Iter 9/10: ladvise speed: 0.358711
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.27543
Iter 10/10: OSS cache speed: 0.335481
Iter 10/10: ladvise speed: 0.313376
Average uncached read: .33
Average speedup with OSS cached read:  .34 = +3%
Average speedup with ladvise willread:  .34 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0