== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:27:35 (1787855255)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0558 s, 7.0 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-ffff8b87c7ceb800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.289235
Iter 1/10: OSS cache speed: 0.369947
Iter 1/10: ladvise speed: 0.432154
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.372578
Iter 2/10: OSS cache speed: 0.429765
Iter 2/10: ladvise speed: 0.450145
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.350442
Iter 3/10: OSS cache speed: 0.441025
Iter 3/10: ladvise speed: 0.450258
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342171
Iter 4/10: OSS cache speed: 0.403375
Iter 4/10: ladvise speed: 0.420899
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.377297
Iter 5/10: OSS cache speed: 0.419543
Iter 5/10: ladvise speed: 0.388267
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.375586
Iter 6/10: OSS cache speed: 0.364153
Iter 6/10: ladvise speed: 0.403602
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.35803
Iter 7/10: OSS cache speed: 0.413121
Iter 7/10: ladvise speed: 0.416235
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.334302
Iter 8/10: OSS cache speed: 0.403281
Iter 8/10: ladvise speed: 0.380837
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.356596
Iter 9/10: OSS cache speed: 0.427883
Iter 9/10: ladvise speed: 0.385235
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.350255
Iter 10/10: OSS cache speed: 0.415973
Iter 10/10: ladvise speed: 0.429372
Average uncached read: .35
Average speedup with OSS cached read:  .40 = +14%
Average speedup with ladvise willread:  .41 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0