== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:30:18 (1746127818)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.17066 s, 17.0 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-ffff88012a595800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.629403
Iter 1/10: OSS cache speed: 0.615425
Iter 1/10: ladvise speed: 0.625467
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.578103
Iter 2/10: OSS cache speed: 0.514088
Iter 2/10: ladvise speed: 0.519772
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.508313
Iter 3/10: OSS cache speed: 0.509543
Iter 3/10: ladvise speed: 0.473834
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.433094
Iter 4/10: OSS cache speed: 0.406595
Iter 4/10: ladvise speed: 0.427838
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.403587
Iter 5/10: OSS cache speed: 0.496581
Iter 5/10: ladvise speed: 0.468836
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.417338
Iter 6/10: OSS cache speed: 0.426507
Iter 6/10: ladvise speed: 0.393484
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.442651
Iter 7/10: OSS cache speed: 0.454036
Iter 7/10: ladvise speed: 0.480295
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.474214
Iter 8/10: OSS cache speed: 0.448984
Iter 8/10: ladvise speed: 0.451112
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.417047
Iter 9/10: OSS cache speed: 0.454092
Iter 9/10: ladvise speed: 0.437682
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.442929
Iter 10/10: OSS cache speed: 0.443625
Iter 10/10: ladvise speed: 0.420813
Average uncached read: .47
Average speedup with OSS cached read:  .47 = +0%
Average speedup with ladvise willread:  .46 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0