== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:43:16 (1786812196)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.6797 s, 9.8 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-ffff969884d27000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.398956
Iter 1/10: OSS cache speed: 0.373034
Iter 1/10: ladvise speed: 0.344235
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.458168
Iter 2/10: OSS cache speed: 0.470633
Iter 2/10: ladvise speed: 0.386275
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.396048
Iter 3/10: OSS cache speed: 0.328068
Iter 3/10: ladvise speed: 0.385003
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.426344
Iter 4/10: OSS cache speed: 0.440439
Iter 4/10: ladvise speed: 0.376487
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.400469
Iter 5/10: OSS cache speed: 0.394739
Iter 5/10: ladvise speed: 0.374246
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.387462
Iter 6/10: OSS cache speed: 0.34343
Iter 6/10: ladvise speed: 0.395489
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.337428
Iter 7/10: OSS cache speed: 0.368616
Iter 7/10: ladvise speed: 0.379056
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.434149
Iter 8/10: OSS cache speed: 0.502734
Iter 8/10: ladvise speed: 0.457891
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.462496
Iter 9/10: OSS cache speed: 0.501354
Iter 9/10: ladvise speed: 0.535432
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.450587
Iter 10/10: OSS cache speed: 0.400692
Iter 10/10: ladvise speed: 0.371684
Average uncached read: .41
Average speedup with OSS cached read:  .41 = +0%
Average speedup with ladvise willread:  .40 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0