== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:21:18 (1788204078)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2497 s, 7.9 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-ffff9455c7109800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.316047
Iter 1/10: OSS cache speed: 0.286413
Iter 1/10: ladvise speed: 0.231773
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.286292
Iter 2/10: OSS cache speed: 0.294445
Iter 2/10: ladvise speed: 0.332702
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.334947
Iter 3/10: OSS cache speed: 0.327835
Iter 3/10: ladvise speed: 0.272967
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.348179
Iter 4/10: OSS cache speed: 0.312555
Iter 4/10: ladvise speed: 0.331753
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.336049
Iter 5/10: OSS cache speed: 0.333885
Iter 5/10: ladvise speed: 0.354485
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.37521
Iter 6/10: OSS cache speed: 0.377301
Iter 6/10: ladvise speed: 0.359509
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.319445
Iter 7/10: OSS cache speed: 0.336613
Iter 7/10: ladvise speed: 0.354031
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.373465
Iter 8/10: OSS cache speed: 0.300129
Iter 8/10: ladvise speed: 0.3194
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.32159
Iter 9/10: OSS cache speed: 0.310935
Iter 9/10: ladvise speed: 0.364194
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.350531
Iter 10/10: OSS cache speed: 0.308016
Iter 10/10: ladvise speed: 0.33894
Average uncached read: .33
Average speedup with OSS cached read:  .31 = +-6%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got -6%. Skipping ladvise willread check.
fail_loc=0