== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:39:09 (1786833549)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8895 s, 8.1 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-ffff8f5ec305b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.439079
Iter 1/10: OSS cache speed: 0.445164
Iter 1/10: ladvise speed: 0.435264
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.362542
Iter 2/10: OSS cache speed: 0.439824
Iter 2/10: ladvise speed: 0.393333
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.385725
Iter 3/10: OSS cache speed: 0.423962
Iter 3/10: ladvise speed: 0.466075
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.386863
Iter 4/10: OSS cache speed: 0.450187
Iter 4/10: ladvise speed: 0.435206
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.416372
Iter 5/10: OSS cache speed: 0.472278
Iter 5/10: ladvise speed: 0.464972
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.424659
Iter 6/10: OSS cache speed: 0.481806
Iter 6/10: ladvise speed: 0.501801
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.416405
Iter 7/10: OSS cache speed: 0.484717
Iter 7/10: ladvise speed: 0.538524
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.453857
Iter 8/10: OSS cache speed: 0.515821
Iter 8/10: ladvise speed: 0.532313
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.472232
Iter 9/10: OSS cache speed: 0.544974
Iter 9/10: ladvise speed: 0.547232
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.515798
Iter 10/10: OSS cache speed: 0.683639
Iter 10/10: ladvise speed: 0.707423
Average uncached read: .42
Average speedup with OSS cached read:  .49 = +16%
Average speedup with ladvise willread:  .50 = +19%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0