== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:47:05 (1787316425)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6298 s, 7.7 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-ffff8ef4d106c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.294603
Iter 1/10: OSS cache speed: 0.338656
Iter 1/10: ladvise speed: 0.343357
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.299273
Iter 2/10: OSS cache speed: 0.328269
Iter 2/10: ladvise speed: 0.316536
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301423
Iter 3/10: OSS cache speed: 0.333705
Iter 3/10: ladvise speed: 0.371258
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.3302
Iter 4/10: OSS cache speed: 0.357858
Iter 4/10: ladvise speed: 0.3145
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.345256
Iter 5/10: OSS cache speed: 0.354547
Iter 5/10: ladvise speed: 0.377325
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.357301
Iter 6/10: OSS cache speed: 0.370408
Iter 6/10: ladvise speed: 0.363167
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.368984
Iter 7/10: OSS cache speed: 0.395363
Iter 7/10: ladvise speed: 0.421654
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.341611
Iter 8/10: OSS cache speed: 0.361269
Iter 8/10: ladvise speed: 0.383693
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.372133
Iter 9/10: OSS cache speed: 0.401667
Iter 9/10: ladvise speed: 0.378381
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.34584
Iter 10/10: OSS cache speed: 0.355582
Iter 10/10: ladvise speed: 0.388547
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .36 = +9%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0