== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:00:04 (1788566404)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8041 s, 7.6 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-ffff9bc58929c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.337079
Iter 1/10: OSS cache speed: 0.33461
Iter 1/10: ladvise speed: 0.415094
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.279402
Iter 2/10: OSS cache speed: 0.399405
Iter 2/10: ladvise speed: 0.310923
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.34798
Iter 3/10: OSS cache speed: 0.318911
Iter 3/10: ladvise speed: 0.383302
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.369549
Iter 4/10: OSS cache speed: 0.418337
Iter 4/10: ladvise speed: 0.429599
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.391269
Iter 5/10: OSS cache speed: 0.347565
Iter 5/10: ladvise speed: 0.332779
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.283735
Iter 6/10: OSS cache speed: 0.301616
Iter 6/10: ladvise speed: 0.318945
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.315843
Iter 7/10: OSS cache speed: 0.292489
Iter 7/10: ladvise speed: 0.311343
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.297981
Iter 8/10: OSS cache speed: 0.30769
Iter 8/10: ladvise speed: 0.308241
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.254179
Iter 9/10: OSS cache speed: 0.335624
Iter 9/10: ladvise speed: 0.293174
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.396016
Iter 10/10: OSS cache speed: 0.428137
Iter 10/10: ladvise speed: 0.393926
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .34 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0