== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:27:23 (1734672443)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.54205 s, 23.1 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-ffff8800b5de9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.886835
Iter 1/10: OSS cache speed: 0.896434
Iter 1/10: ladvise speed: 0.817224
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.841314
Iter 2/10: OSS cache speed: 0.847153
Iter 2/10: ladvise speed: 0.839132
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.975688
Iter 3/10: OSS cache speed: 0.918171
Iter 3/10: ladvise speed: 0.97021
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.923578
Iter 4/10: OSS cache speed: 0.969635
Iter 4/10: ladvise speed: 0.893706
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.851282
Iter 5/10: OSS cache speed: 0.945233
Iter 5/10: ladvise speed: 0.977504
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.983973
Iter 6/10: OSS cache speed: 0.98479
Iter 6/10: ladvise speed: 0.9908
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.1513
Iter 7/10: OSS cache speed: 1.09082
Iter 7/10: ladvise speed: 1.2099
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.05803
Iter 8/10: OSS cache speed: 0.992943
Iter 8/10: ladvise speed: 0.9699
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.866712
Iter 9/10: OSS cache speed: 0.767135
Iter 9/10: ladvise speed: 0.820485
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.8573
Iter 10/10: OSS cache speed: 0.88175
Iter 10/10: ladvise speed: 0.822121
Average uncached read: .93
Average speedup with OSS cached read:  .92 = +-1%
Average speedup with ladvise willread:  .93 = +0%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0