== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:47:23 (1787831243)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2233 s, 7.9 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-ffff8fa2c8adf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.408012
Iter 1/10: OSS cache speed: 0.419392
Iter 1/10: ladvise speed: 0.430272
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.353035
Iter 2/10: OSS cache speed: 0.39636
Iter 2/10: ladvise speed: 0.39954
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.423147
Iter 3/10: OSS cache speed: 0.359284
Iter 3/10: ladvise speed: 0.438244
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.354723
Iter 4/10: OSS cache speed: 0.385291
Iter 4/10: ladvise speed: 0.425785
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.341633
Iter 5/10: OSS cache speed: 0.379968
Iter 5/10: ladvise speed: 0.41598
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.332904
Iter 6/10: OSS cache speed: 0.368391
Iter 6/10: ladvise speed: 0.354491
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.297255
Iter 7/10: OSS cache speed: 0.375493
Iter 7/10: ladvise speed: 0.337979
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.369098
Iter 8/10: OSS cache speed: 0.395787
Iter 8/10: ladvise speed: 0.468438
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.297463
Iter 9/10: OSS cache speed: 0.369125
Iter 9/10: ladvise speed: 0.320695
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.334738
Iter 10/10: OSS cache speed: 0.393794
Iter 10/10: ladvise speed: 0.361247
Average uncached read: .35
Average speedup with OSS cached read:  .38 = +8%
Average speedup with ladvise willread:  .39 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0