== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:37:25 (1787582245)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7976 s, 8.2 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-ffff8e2588ad6000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.420507
Iter 1/10: OSS cache speed: 0.39678
Iter 1/10: ladvise speed: 0.411649
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.375265
Iter 2/10: OSS cache speed: 0.337557
Iter 2/10: ladvise speed: 0.325062
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.354523
Iter 3/10: OSS cache speed: 0.332788
Iter 3/10: ladvise speed: 0.386035
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.302232
Iter 4/10: OSS cache speed: 0.380161
Iter 4/10: ladvise speed: 0.398618
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.32228
Iter 5/10: OSS cache speed: 0.291101
Iter 5/10: ladvise speed: 0.33843
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.336853
Iter 6/10: OSS cache speed: 0.345036
Iter 6/10: ladvise speed: 0.339101
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.341985
Iter 7/10: OSS cache speed: 0.360387
Iter 7/10: ladvise speed: 0.331981
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.329644
Iter 8/10: OSS cache speed: 0.339145
Iter 8/10: ladvise speed: 0.390714
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377035
Iter 9/10: OSS cache speed: 0.355517
Iter 9/10: ladvise speed: 0.29807
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.369834
Iter 10/10: OSS cache speed: 0.231919
Iter 10/10: ladvise speed: 0.367588
Average uncached read: .35
Average speedup with OSS cached read:  .33 = +-5%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0