== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:22:12 (1788747732)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3026 s, 9.3 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-ffff8a1020340800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.35699
Iter 1/10: OSS cache speed: 0.397475
Iter 1/10: ladvise speed: 0.38884
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.360612
Iter 2/10: OSS cache speed: 0.353794
Iter 2/10: ladvise speed: 0.36342
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.381585
Iter 3/10: OSS cache speed: 0.399608
Iter 3/10: ladvise speed: 0.404322
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.39901
Iter 4/10: OSS cache speed: 0.413813
Iter 4/10: ladvise speed: 0.353929
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.436758
Iter 5/10: OSS cache speed: 0.452739
Iter 5/10: ladvise speed: 0.453997
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.485404
Iter 6/10: OSS cache speed: 0.450021
Iter 6/10: ladvise speed: 0.454596
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.463013
Iter 7/10: OSS cache speed: 0.468551
Iter 7/10: ladvise speed: 0.472106
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.485194
Iter 8/10: OSS cache speed: 0.484622
Iter 8/10: ladvise speed: 0.497162
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.53998
Iter 9/10: OSS cache speed: 0.288291
Iter 9/10: ladvise speed: 0.381155
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.436107
Iter 10/10: OSS cache speed: 0.413255
Iter 10/10: ladvise speed: 0.389868
Average uncached read: .43
Average speedup with OSS cached read:  .41 = +-4%
Average speedup with ladvise willread:  .41 = +-4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0