== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:17:29 (1787138249)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.5534 s, 7.7 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-ffffa0e282e00000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.300843
Iter 1/10: OSS cache speed: 0.2979
Iter 1/10: ladvise speed: 0.27334
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.3417
Iter 2/10: OSS cache speed: 0.270137
Iter 2/10: ladvise speed: 0.290289
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.346508
Iter 3/10: OSS cache speed: 0.316528
Iter 3/10: ladvise speed: 0.329835
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.316475
Iter 4/10: OSS cache speed: 0.359154
Iter 4/10: ladvise speed: 0.318912
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.352448
Iter 5/10: OSS cache speed: 0.311223
Iter 5/10: ladvise speed: 0.339668
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.310307
Iter 6/10: OSS cache speed: 0.326064
Iter 6/10: ladvise speed: 0.345441
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.314164
Iter 7/10: OSS cache speed: 0.262224
Iter 7/10: ladvise speed: 0.310655
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.285426
Iter 8/10: OSS cache speed: 0.275128
Iter 8/10: ladvise speed: 0.318092
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.337474
Iter 9/10: OSS cache speed: 0.337218
Iter 9/10: ladvise speed: 0.308643
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.334103
Iter 10/10: OSS cache speed: 0.348152
Iter 10/10: ladvise speed: 0.312724
Average uncached read: .32
Average speedup with OSS cached read:  .31 = +-3%
Average speedup with ladvise willread:  .31 = +-3%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0