== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:52:20 (1789440740)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.6051 s, 7.2 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-ffff9cf90563d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.373085
Iter 1/10: OSS cache speed: 0.451696
Iter 1/10: ladvise speed: 0.429803
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.336917
Iter 2/10: OSS cache speed: 0.378796
Iter 2/10: ladvise speed: 0.406982
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.392404
Iter 3/10: OSS cache speed: 0.427394
Iter 3/10: ladvise speed: 0.326495
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.395216
Iter 4/10: OSS cache speed: 0.405379
Iter 4/10: ladvise speed: 0.446052
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.331786
Iter 5/10: OSS cache speed: 0.401311
Iter 5/10: ladvise speed: 0.436536
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329807
Iter 6/10: OSS cache speed: 0.411215
Iter 6/10: ladvise speed: 0.348753
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.379054
Iter 7/10: OSS cache speed: 0.426356
Iter 7/10: ladvise speed: 0.429219
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.386563
Iter 8/10: OSS cache speed: 0.390423
Iter 8/10: ladvise speed: 0.381286
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.37621
Iter 9/10: OSS cache speed: 0.350676
Iter 9/10: ladvise speed: 0.382092
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.318034
Iter 10/10: OSS cache speed: 0.392253
Iter 10/10: ladvise speed: 0.33773
Average uncached read: .36
Average speedup with OSS cached read:  .40 = +11%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0