== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:28:32 (1746145712)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.35668 s, 31.2 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-ffff8800b3bb6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.968843
Iter 1/10: OSS cache speed: 1.02943
Iter 1/10: ladvise speed: 0.93901
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.877506
Iter 2/10: OSS cache speed: 0.82451
Iter 2/10: ladvise speed: 0.868338
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.933248
Iter 3/10: OSS cache speed: 0.867971
Iter 3/10: ladvise speed: 0.883121
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.792658
Iter 4/10: OSS cache speed: 0.865327
Iter 4/10: ladvise speed: 0.827584
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.926561
Iter 5/10: OSS cache speed: 0.816136
Iter 5/10: ladvise speed: 0.868956
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.856242
Iter 6/10: OSS cache speed: 0.849055
Iter 6/10: ladvise speed: 0.805368
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.815096
Iter 7/10: OSS cache speed: 0.840313
Iter 7/10: ladvise speed: 0.799915
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.800775
Iter 8/10: OSS cache speed: 0.881972
Iter 8/10: ladvise speed: 0.800009
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.846762
Iter 9/10: OSS cache speed: 0.883849
Iter 9/10: ladvise speed: 0.789557
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.803331
Iter 10/10: OSS cache speed: 0.861576
Iter 10/10: ladvise speed: 0.857925
Average uncached read: .86
Average speedup with OSS cached read:  .87 = +1%
Average speedup with ladvise willread:  .84 = +-2%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0