== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:41:22 (1790782882)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.1948 s, 7.4 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-ffff9353e07bc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.4556
Iter 1/10: OSS cache speed: 0.441595
Iter 1/10: ladvise speed: 0.377807
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.365845
Iter 2/10: OSS cache speed: 0.400542
Iter 2/10: ladvise speed: 0.391716
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394009
Iter 3/10: OSS cache speed: 0.448007
Iter 3/10: ladvise speed: 0.410111
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.319506
Iter 4/10: OSS cache speed: 0.387263
Iter 4/10: ladvise speed: 0.392015
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.441373
Iter 5/10: OSS cache speed: 0.416076
Iter 5/10: ladvise speed: 0.394649
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.396048
Iter 6/10: OSS cache speed: 0.399475
Iter 6/10: ladvise speed: 0.462748
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.36024
Iter 7/10: OSS cache speed: 0.314725
Iter 7/10: ladvise speed: 0.325055
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.335585
Iter 8/10: OSS cache speed: 0.321172
Iter 8/10: ladvise speed: 0.320628
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331638
Iter 9/10: OSS cache speed: 0.419474
Iter 9/10: ladvise speed: 0.37731
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.354883
Iter 10/10: OSS cache speed: 0.424739
Iter 10/10: ladvise speed: 0.383852
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .38 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0