== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:49:43 (1788871783)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.3771 s, 8.5 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-ffffa09207eac800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.435624
Iter 1/10: OSS cache speed: 0.431175
Iter 1/10: ladvise speed: 0.336825
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.381803
Iter 2/10: OSS cache speed: 0.379725
Iter 2/10: ladvise speed: 0.325609
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.406165
Iter 3/10: OSS cache speed: 0.400991
Iter 3/10: ladvise speed: 0.314918
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.349471
Iter 4/10: OSS cache speed: 0.367132
Iter 4/10: ladvise speed: 0.335922
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.2908
Iter 5/10: OSS cache speed: 0.340922
Iter 5/10: ladvise speed: 0.385234
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.35227
Iter 6/10: OSS cache speed: 0.328557
Iter 6/10: ladvise speed: 0.444564
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.386424
Iter 7/10: OSS cache speed: 0.375445
Iter 7/10: ladvise speed: 0.392846
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.350091
Iter 8/10: OSS cache speed: 0.450541
Iter 8/10: ladvise speed: 0.372271
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.394572
Iter 9/10: OSS cache speed: 0.453833
Iter 9/10: ladvise speed: 0.462325
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.443941
Iter 10/10: OSS cache speed: 0.448087
Iter 10/10: ladvise speed: 0.440748
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