== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:48:25 (1784940505)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.5162 s, 9.1 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-ffff91a483efc000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.342695
Iter 1/10: OSS cache speed: 0.37971
Iter 1/10: ladvise speed: 0.437375
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.364149
Iter 2/10: OSS cache speed: 0.384858
Iter 2/10: ladvise speed: 0.40378
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.430629
Iter 3/10: OSS cache speed: 0.425036
Iter 3/10: ladvise speed: 0.447326
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.45717
Iter 4/10: OSS cache speed: 0.498008
Iter 4/10: ladvise speed: 0.471766
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.386334
Iter 5/10: OSS cache speed: 0.452054
Iter 5/10: ladvise speed: 0.435528
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.41311
Iter 6/10: OSS cache speed: 0.453768
Iter 6/10: ladvise speed: 0.504678
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.498004
Iter 7/10: OSS cache speed: 0.512632
Iter 7/10: ladvise speed: 0.53087
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.545271
Iter 8/10: OSS cache speed: 0.516361
Iter 8/10: ladvise speed: 0.538662
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.575124
Iter 9/10: OSS cache speed: 0.6076
Iter 9/10: ladvise speed: 0.54574
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.534959
Iter 10/10: OSS cache speed: 0.607038
Iter 10/10: ladvise speed: 0.605456
Average uncached read: .45
Average speedup with OSS cached read:  .48 = +6%
Average speedup with ladvise willread:  .49 = +8%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0