== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:28:23 (1788542903)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5789 s, 6.7 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-ffff9316d0451000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.325154
Iter 1/10: OSS cache speed: 0.333464
Iter 1/10: ladvise speed: 0.364036
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.302937
Iter 2/10: OSS cache speed: 0.325745
Iter 2/10: ladvise speed: 0.338341
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.342227
Iter 3/10: OSS cache speed: 0.388564
Iter 3/10: ladvise speed: 0.366284
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.342318
Iter 4/10: OSS cache speed: 0.328276
Iter 4/10: ladvise speed: 0.340949
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.290516
Iter 5/10: OSS cache speed: 0.348758
Iter 5/10: ladvise speed: 0.32975
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.29713
Iter 6/10: OSS cache speed: 0.332202
Iter 6/10: ladvise speed: 0.357796
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.328934
Iter 7/10: OSS cache speed: 0.347438
Iter 7/10: ladvise speed: 0.375999
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.346085
Iter 8/10: OSS cache speed: 0.371941
Iter 8/10: ladvise speed: 0.335198
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.342809
Iter 9/10: OSS cache speed: 0.392924
Iter 9/10: ladvise speed: 0.373681
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.330158
Iter 10/10: OSS cache speed: 0.342424
Iter 10/10: ladvise speed: 0.348041
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0