== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:53:32 (1789052012)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2048 s, 7.9 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-ffff9b4d11d26800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.308768
Iter 1/10: OSS cache speed: 0.334828
Iter 1/10: ladvise speed: 0.353093
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.311445
Iter 2/10: OSS cache speed: 0.322038
Iter 2/10: ladvise speed: 0.332043
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32428
Iter 3/10: OSS cache speed: 0.285369
Iter 3/10: ladvise speed: 0.379007
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.297916
Iter 4/10: OSS cache speed: 0.369172
Iter 4/10: ladvise speed: 0.376379
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.382676
Iter 5/10: OSS cache speed: 0.36278
Iter 5/10: ladvise speed: 0.40953
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.370896
Iter 6/10: OSS cache speed: 0.3593
Iter 6/10: ladvise speed: 0.372716
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.380671
Iter 7/10: OSS cache speed: 0.393288
Iter 7/10: ladvise speed: 0.328615
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350505
Iter 8/10: OSS cache speed: 0.399744
Iter 8/10: ladvise speed: 0.330823
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.364451
Iter 9/10: OSS cache speed: 0.302742
Iter 9/10: ladvise speed: 0.337036
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.272888
Iter 10/10: OSS cache speed: 0.406192
Iter 10/10: ladvise speed: 0.411376
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .36 = +9%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0