== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:54:25 (1787788465)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5763 s, 6.7 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-ffff939c509db800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.404886
Iter 1/10: OSS cache speed: 0.423003
Iter 1/10: ladvise speed: 0.44166
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.402064
Iter 2/10: OSS cache speed: 0.44335
Iter 2/10: ladvise speed: 0.401956
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.367694
Iter 3/10: OSS cache speed: 0.44293
Iter 3/10: ladvise speed: 0.442289
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.443356
Iter 4/10: OSS cache speed: 0.407296
Iter 4/10: ladvise speed: 0.426409
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.438093
Iter 5/10: OSS cache speed: 0.424379
Iter 5/10: ladvise speed: 0.373239
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.490181
Iter 6/10: OSS cache speed: 0.438889
Iter 6/10: ladvise speed: 0.520795
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.484089
Iter 7/10: OSS cache speed: 0.519941
Iter 7/10: ladvise speed: 0.48943
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.41904
Iter 8/10: OSS cache speed: 0.429936
Iter 8/10: ladvise speed: 0.536566
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.418372
Iter 9/10: OSS cache speed: 0.533129
Iter 9/10: ladvise speed: 0.454728
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.531692
Iter 10/10: OSS cache speed: 0.511454
Iter 10/10: ladvise speed: 0.533203
Average uncached read: .43
Average speedup with OSS cached read:  .45 = +4%
Average speedup with ladvise willread:  .46 = +6%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0