== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:45:58 (1786963558)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3677 s, 8.5 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-ffff9a21883c2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.366932
Iter 1/10: OSS cache speed: 0.303275
Iter 1/10: ladvise speed: 0.330219
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.394338
Iter 2/10: OSS cache speed: 0.31596
Iter 2/10: ladvise speed: 0.371742
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.341755
Iter 3/10: OSS cache speed: 0.362489
Iter 3/10: ladvise speed: 0.344074
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355267
Iter 4/10: OSS cache speed: 0.371776
Iter 4/10: ladvise speed: 0.398808
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359521
Iter 5/10: OSS cache speed: 0.349043
Iter 5/10: ladvise speed: 0.419827
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.427726
Iter 6/10: OSS cache speed: 0.469304
Iter 6/10: ladvise speed: 0.398923
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.435626
Iter 7/10: OSS cache speed: 0.397233
Iter 7/10: ladvise speed: 0.396344
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.410756
Iter 8/10: OSS cache speed: 0.360539
Iter 8/10: ladvise speed: 0.366865
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.327515
Iter 9/10: OSS cache speed: 0.308585
Iter 9/10: ladvise speed: 0.364839
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.371567
Iter 10/10: OSS cache speed: 0.365929
Iter 10/10: ladvise speed: 0.363405
Average uncached read: .37
Average speedup with OSS cached read:  .36 = +-2%
Average speedup with ladvise willread:  .37 = +0%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0