== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:27:00 (1788215220)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1066 s, 8.0 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-ffff97b444f8c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.343374
Iter 1/10: OSS cache speed: 0.342559
Iter 1/10: ladvise speed: 0.3408
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.282307
Iter 2/10: OSS cache speed: 0.367726
Iter 2/10: ladvise speed: 0.392591
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.360317
Iter 3/10: OSS cache speed: 0.381126
Iter 3/10: ladvise speed: 0.317986
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.361505
Iter 4/10: OSS cache speed: 0.36564
Iter 4/10: ladvise speed: 0.361211
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.284249
Iter 5/10: OSS cache speed: 0.358254
Iter 5/10: ladvise speed: 0.34922
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.306222
Iter 6/10: OSS cache speed: 0.370606
Iter 6/10: ladvise speed: 0.372947
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.366367
Iter 7/10: OSS cache speed: 0.331435
Iter 7/10: ladvise speed: 0.364007
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.36913
Iter 8/10: OSS cache speed: 0.329329
Iter 8/10: ladvise speed: 0.384531
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.379933
Iter 9/10: OSS cache speed: 0.349622
Iter 9/10: ladvise speed: 0.348399
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.332645
Iter 10/10: OSS cache speed: 0.338519
Iter 10/10: ladvise speed: 0.362615
Average uncached read: .33
Average speedup with OSS cached read:  .35 = +6%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0