== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:53:50 (1760126030)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.05199 s, 13.0 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-ffff962086039800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.585614
Iter 1/10: OSS cache speed: 0.612686
Iter 1/10: ladvise speed: 0.60573
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.764574
Iter 2/10: OSS cache speed: 0.751721
Iter 2/10: ladvise speed: 0.370876
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.575274
Iter 3/10: OSS cache speed: 0.559784
Iter 3/10: ladvise speed: 0.592634
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.375608
Iter 4/10: OSS cache speed: 0.517973
Iter 4/10: ladvise speed: 0.53707
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.514263
Iter 5/10: OSS cache speed: 0.45634
Iter 5/10: ladvise speed: 0.461419
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.419305
Iter 6/10: OSS cache speed: 0.509528
Iter 6/10: ladvise speed: 0.482076
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.480127
Iter 7/10: OSS cache speed: 0.469699
Iter 7/10: ladvise speed: 0.479542
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.437767
Iter 8/10: OSS cache speed: 0.544296
Iter 8/10: ladvise speed: 0.558467
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.639519
Iter 9/10: OSS cache speed: 0.503645
Iter 9/10: ladvise speed: 0.506588
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.438768
Iter 10/10: OSS cache speed: 0.514802
Iter 10/10: ladvise speed: 0.480187
Average uncached read: .52
Average speedup with OSS cached read:  .54 = +3%
Average speedup with ladvise willread:  .50 = +-3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0