== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:38:48 (1787125128)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.8817 s, 9.6 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-ffff9a7b86206800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.41953
Iter 1/10: OSS cache speed: 0.415419
Iter 1/10: ladvise speed: 0.502647
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.512876
Iter 2/10: OSS cache speed: 0.40743
Iter 2/10: ladvise speed: 0.410704
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.416116
Iter 3/10: OSS cache speed: 0.423143
Iter 3/10: ladvise speed: 0.484388
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.394895
Iter 4/10: OSS cache speed: 0.345389
Iter 4/10: ladvise speed: 0.320856
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.422501
Iter 5/10: OSS cache speed: 0.40356
Iter 5/10: ladvise speed: 0.424814
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.373936
Iter 6/10: OSS cache speed: 0.394829
Iter 6/10: ladvise speed: 0.443984
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.439413
Iter 7/10: OSS cache speed: 0.389175
Iter 7/10: ladvise speed: 0.442772
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.432546
Iter 8/10: OSS cache speed: 0.359006
Iter 8/10: ladvise speed: 0.36914
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.414748
Iter 9/10: OSS cache speed: 0.448186
Iter 9/10: ladvise speed: 0.424666
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.453225
Iter 10/10: OSS cache speed: 0.397602
Iter 10/10: ladvise speed: 0.413399
Average uncached read: .42
Average speedup with OSS cached read:  .39 = +-7%
Average speedup with ladvise willread:  .42 = +0%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0