== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:42:59 (1787110979)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9505 s, 8.1 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-ffff892786765000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.365687
Iter 1/10: OSS cache speed: 0.401266
Iter 1/10: ladvise speed: 0.389494
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.326186
Iter 2/10: OSS cache speed: 0.345631
Iter 2/10: ladvise speed: 0.403422
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.440683
Iter 3/10: OSS cache speed: 0.44878
Iter 3/10: ladvise speed: 0.361139
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.462954
Iter 4/10: OSS cache speed: 0.388176
Iter 4/10: ladvise speed: 0.446284
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.435128
Iter 5/10: OSS cache speed: 0.443801
Iter 5/10: ladvise speed: 0.436106
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.467693
Iter 6/10: OSS cache speed: 0.458174
Iter 6/10: ladvise speed: 0.369278
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.469956
Iter 7/10: OSS cache speed: 0.432259
Iter 7/10: ladvise speed: 0.425237
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.364193
Iter 8/10: OSS cache speed: 0.401057
Iter 8/10: ladvise speed: 0.354829
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.376069
Iter 9/10: OSS cache speed: 0.436279
Iter 9/10: ladvise speed: 0.406398
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.371845
Iter 10/10: OSS cache speed: 0.371037
Iter 10/10: ladvise speed: 0.335577
Average uncached read: .40
Average speedup with OSS cached read:  .41 = +2%
Average speedup with ladvise willread:  .39 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0