== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:57:30 (1787572650)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8818 s, 7.6 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-ffff8b2104ddd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.340257
Iter 1/10: OSS cache speed: 0.355881
Iter 1/10: ladvise speed: 0.324397
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.341456
Iter 2/10: OSS cache speed: 0.322593
Iter 2/10: ladvise speed: 0.368511
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.347418
Iter 3/10: OSS cache speed: 0.372515
Iter 3/10: ladvise speed: 0.365094
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.307312
Iter 4/10: OSS cache speed: 0.304258
Iter 4/10: ladvise speed: 0.34896
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.350391
Iter 5/10: OSS cache speed: 0.355163
Iter 5/10: ladvise speed: 0.353536
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.29027
Iter 6/10: OSS cache speed: 0.305672
Iter 6/10: ladvise speed: 0.34996
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375805
Iter 7/10: OSS cache speed: 0.360475
Iter 7/10: ladvise speed: 0.302997
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.328387
Iter 8/10: OSS cache speed: 0.295487
Iter 8/10: ladvise speed: 0.31715
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.324051
Iter 9/10: OSS cache speed: 0.327831
Iter 9/10: ladvise speed: 0.357006
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.33539
Iter 10/10: OSS cache speed: 0.404355
Iter 10/10: ladvise speed: 0.383904
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