== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:10:57 (1788876657)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0346 s, 10.4 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-ffff8d43519b4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.463675
Iter 1/10: OSS cache speed: 0.497211
Iter 1/10: ladvise speed: 0.462618
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.418853
Iter 2/10: OSS cache speed: 0.43401
Iter 2/10: ladvise speed: 0.419585
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.446556
Iter 3/10: OSS cache speed: 0.463724
Iter 3/10: ladvise speed: 0.457797
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.46166
Iter 4/10: OSS cache speed: 0.510564
Iter 4/10: ladvise speed: 0.436225
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.282856
Iter 5/10: OSS cache speed: 0.356439
Iter 5/10: ladvise speed: 0.40089
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388505
Iter 6/10: OSS cache speed: 0.398319
Iter 6/10: ladvise speed: 0.421931
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.462221
Iter 7/10: OSS cache speed: 0.400471
Iter 7/10: ladvise speed: 0.41448
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.469573
Iter 8/10: OSS cache speed: 0.500918
Iter 8/10: ladvise speed: 0.511773
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.546848
Iter 9/10: OSS cache speed: 0.581298
Iter 9/10: ladvise speed: 0.625235
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.691578
Iter 10/10: OSS cache speed: 0.718652
Iter 10/10: ladvise speed: 0.697879
Average uncached read: .46
Average speedup with OSS cached read:  .48 = +4%
Average speedup with ladvise willread:  .48 = +4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0