== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:36:36 (1782610596)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5182 s, 7.2 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-ffff919d44efb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.377628
Iter 1/10: OSS cache speed: 0.33184
Iter 1/10: ladvise speed: 0.338217
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.280295
Iter 2/10: OSS cache speed: 0.285885
Iter 2/10: ladvise speed: 0.314104
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.308447
Iter 3/10: OSS cache speed: 0.297958
Iter 3/10: ladvise speed: 0.333192
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.261469
Iter 4/10: OSS cache speed: 0.273639
Iter 4/10: ladvise speed: 0.305235
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.342423
Iter 5/10: OSS cache speed: 0.356934
Iter 5/10: ladvise speed: 0.314789
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.298239
Iter 6/10: OSS cache speed: 0.331567
Iter 6/10: ladvise speed: 0.360803
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.304587
Iter 7/10: OSS cache speed: 0.339664
Iter 7/10: ladvise speed: 0.34867
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.331152
Iter 8/10: OSS cache speed: 0.340015
Iter 8/10: ladvise speed: 0.411358
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.366501
Iter 9/10: OSS cache speed: 0.352446
Iter 9/10: ladvise speed: 0.421458
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.365997
Iter 10/10: OSS cache speed: 0.353953
Iter 10/10: ladvise speed: 0.375013
Average uncached read: .32
Average speedup with OSS cached read:  .32 = +0%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0