== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:09:41 (1786752581)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7343 s, 8.9 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-ffff8d7483e9b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.398151
Iter 1/10: OSS cache speed: 0.444496
Iter 1/10: ladvise speed: 0.437367
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.425864
Iter 2/10: OSS cache speed: 0.462503
Iter 2/10: ladvise speed: 0.43763
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.398807
Iter 3/10: OSS cache speed: 0.469438
Iter 3/10: ladvise speed: 0.465879
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.395975
Iter 4/10: OSS cache speed: 0.464349
Iter 4/10: ladvise speed: 0.37758
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.404859
Iter 5/10: OSS cache speed: 0.430224
Iter 5/10: ladvise speed: 0.436695
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.448515
Iter 6/10: OSS cache speed: 0.403712
Iter 6/10: ladvise speed: 0.405638
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.437742
Iter 7/10: OSS cache speed: 0.424711
Iter 7/10: ladvise speed: 0.387871
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.424383
Iter 8/10: OSS cache speed: 0.459539
Iter 8/10: ladvise speed: 0.413326
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.38311
Iter 9/10: OSS cache speed: 0.394964
Iter 9/10: ladvise speed: 0.432966
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.474014
Iter 10/10: OSS cache speed: 0.436438
Iter 10/10: ladvise speed: 0.390188
Average uncached read: .41
Average speedup with OSS cached read:  .43 = +4%
Average speedup with ladvise willread:  .41 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0