== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:27:45 (1780993665)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.4209 s, 10.1 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-ffff97bad14e4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.359523
Iter 1/10: OSS cache speed: 0.372901
Iter 1/10: ladvise speed: 0.322417
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.321866
Iter 2/10: OSS cache speed: 0.340608
Iter 2/10: ladvise speed: 0.363354
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.366121
Iter 3/10: OSS cache speed: 0.36799
Iter 3/10: ladvise speed: 0.359952
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.277028
Iter 4/10: OSS cache speed: 0.332841
Iter 4/10: ladvise speed: 0.318675
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.353524
Iter 5/10: OSS cache speed: 0.33007
Iter 5/10: ladvise speed: 0.309764
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.341993
Iter 6/10: OSS cache speed: 0.299902
Iter 6/10: ladvise speed: 0.296274
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.319828
Iter 7/10: OSS cache speed: 0.362797
Iter 7/10: ladvise speed: 0.305449
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.320956
Iter 8/10: OSS cache speed: 0.291922
Iter 8/10: ladvise speed: 0.305644
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.304047
Iter 9/10: OSS cache speed: 0.320904
Iter 9/10: ladvise speed: 0.297125
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.31366
Iter 10/10: OSS cache speed: 0.330223
Iter 10/10: ladvise speed: 0.294156
Average uncached read: .32
Average speedup with OSS cached read:  .33 = +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