== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:56:28 (1777499788)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.77812 s, 11.9 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-ffff8b43c8945800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.44815
Iter 1/10: OSS cache speed: 0.465431
Iter 1/10: ladvise speed: 0.480097
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.475266
Iter 2/10: OSS cache speed: 0.530061
Iter 2/10: ladvise speed: 0.592995
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.593457
Iter 3/10: OSS cache speed: 0.602721
Iter 3/10: ladvise speed: 0.659309
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.652191
Iter 4/10: OSS cache speed: 0.617753
Iter 4/10: ladvise speed: 0.677263
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.662603
Iter 5/10: OSS cache speed: 0.700465
Iter 5/10: ladvise speed: 0.763399
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.873807
Iter 6/10: OSS cache speed: 0.752253
Iter 6/10: ladvise speed: 0.661287
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.718771
Iter 7/10: OSS cache speed: 0.758389
Iter 7/10: ladvise speed: 0.880943
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.890134
Iter 8/10: OSS cache speed: 0.855035
Iter 8/10: ladvise speed: 0.976578
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.18966
Iter 9/10: OSS cache speed: 1.28818
Iter 9/10: ladvise speed: 1.27864
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.19457
Iter 10/10: OSS cache speed: 0.991809
Iter 10/10: ladvise speed: 1.13405
Average uncached read: .76
Average speedup with OSS cached read:  .75 = +-1%
Average speedup with ladvise willread:  .81 = +6%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0