== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:27:59 (1781231279)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2594 s, 8.6 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-ffffa0ed062c1800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.444623
Iter 1/10: OSS cache speed: 0.409583
Iter 1/10: ladvise speed: 0.354381
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.348822
Iter 2/10: OSS cache speed: 0.358813
Iter 2/10: ladvise speed: 0.331068
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.310896
Iter 3/10: OSS cache speed: 0.37326
Iter 3/10: ladvise speed: 0.33483
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.291479
Iter 4/10: OSS cache speed: 0.350428
Iter 4/10: ladvise speed: 0.364777
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.368465
Iter 5/10: OSS cache speed: 0.402917
Iter 5/10: ladvise speed: 0.413738
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.354796
Iter 6/10: OSS cache speed: 0.366686
Iter 6/10: ladvise speed: 0.409085
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.413225
Iter 7/10: OSS cache speed: 0.422928
Iter 7/10: ladvise speed: 0.395771
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.358168
Iter 8/10: OSS cache speed: 0.441274
Iter 8/10: ladvise speed: 0.393725
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.351376
Iter 9/10: OSS cache speed: 0.454168
Iter 9/10: ladvise speed: 0.464908
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.361997
Iter 10/10: OSS cache speed: 0.35944
Iter 10/10: ladvise speed: 0.441759
Average uncached read: .36
Average speedup with OSS cached read:  .39 = +8%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0