== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:02:09 (1788746529)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.466 s, 7.8 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-ffffa09ad06ac000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.417341
Iter 1/10: OSS cache speed: 0.483926
Iter 1/10: ladvise speed: 0.515895
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.424087
Iter 2/10: OSS cache speed: 0.5013
Iter 2/10: ladvise speed: 0.508664
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.510232
Iter 3/10: OSS cache speed: 0.5585
Iter 3/10: ladvise speed: 0.576098
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.380468
Iter 4/10: OSS cache speed: 0.423819
Iter 4/10: ladvise speed: 0.494531
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.490605
Iter 5/10: OSS cache speed: 0.560165
Iter 5/10: ladvise speed: 0.514412
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.48291
Iter 6/10: OSS cache speed: 0.430231
Iter 6/10: ladvise speed: 0.422628
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.444384
Iter 7/10: OSS cache speed: 0.48249
Iter 7/10: ladvise speed: 0.424686
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.361237
Iter 8/10: OSS cache speed: 0.417336
Iter 8/10: ladvise speed: 0.450407
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.423889
Iter 9/10: OSS cache speed: 0.486162
Iter 9/10: ladvise speed: 0.451907
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.395577
Iter 10/10: OSS cache speed: 0.411232
Iter 10/10: ladvise speed: 0.474033
Average uncached read: .43
Average speedup with OSS cached read:  .47 = +9%
Average speedup with ladvise willread:  .48 = +11%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0