== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:51:56 (1790880716)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.41441 s, 16.3 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-ffff88f889007000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.19765
Iter 1/10: OSS cache speed: 2.58763
Iter 1/10: ladvise speed: 2.83946
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.59972
Iter 2/10: OSS cache speed: 2.47665
Iter 2/10: ladvise speed: 2.4044
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.19089
Iter 3/10: OSS cache speed: 2.5612
Iter 3/10: ladvise speed: 2.55128
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.34029
Iter 4/10: OSS cache speed: 2.66959
Iter 4/10: ladvise speed: 2.56949
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.3545
Iter 5/10: OSS cache speed: 2.57121
Iter 5/10: ladvise speed: 2.64105
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.44338
Iter 6/10: OSS cache speed: 1.95684
Iter 6/10: ladvise speed: 0.676772
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.757008
Iter 7/10: OSS cache speed: 0.703064
Iter 7/10: ladvise speed: 0.771269
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.676271
Iter 8/10: OSS cache speed: 0.945476
Iter 8/10: ladvise speed: 1.00837
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.91949
Iter 9/10: OSS cache speed: 0.998122
Iter 9/10: ladvise speed: 1.27741
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.969182
Iter 10/10: OSS cache speed: 1.15876
Iter 10/10: ladvise speed: 1.35448
Average uncached read: 1.74
Average speedup with OSS cached read:  1.86 = +6%
Average speedup with ladvise willread:  1.80 = +3%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0