== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:26:47 (1788794807)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.7403 s, 6.7 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-ffff978747ffa800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389427
Iter 1/10: OSS cache speed: 0.370045
Iter 1/10: ladvise speed: 0.346303
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.430484
Iter 2/10: OSS cache speed: 0.410788
Iter 2/10: ladvise speed: 0.377509
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.327243
Iter 3/10: OSS cache speed: 0.346678
Iter 3/10: ladvise speed: 0.351181
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.344975
Iter 4/10: OSS cache speed: 0.381605
Iter 4/10: ladvise speed: 0.300505
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.338969
Iter 5/10: OSS cache speed: 0.419837
Iter 5/10: ladvise speed: 0.387759
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.374911
Iter 6/10: OSS cache speed: 0.343191
Iter 6/10: ladvise speed: 0.337372
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.264357
Iter 7/10: OSS cache speed: 0.305167
Iter 7/10: ladvise speed: 0.369908
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.401295
Iter 8/10: OSS cache speed: 0.374066
Iter 8/10: ladvise speed: 0.289677
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.383784
Iter 9/10: OSS cache speed: 0.330785
Iter 9/10: ladvise speed: 0.33672
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.363914
Iter 10/10: OSS cache speed: 0.350324
Iter 10/10: ladvise speed: 0.346961
Average uncached read: .36
Average speedup with OSS cached read:  .36 = +0%
Average speedup with ladvise willread:  .34 = +-5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0