== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:09:29 (1746133769)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.17653 s, 33.0 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-ffff88012b3b2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.5211
Iter 1/10: OSS cache speed: 1.3915
Iter 1/10: ladvise speed: 1.77305
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.08191
Iter 2/10: OSS cache speed: 1.61006
Iter 2/10: ladvise speed: 1.22703
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.07246
Iter 3/10: OSS cache speed: 1.58215
Iter 3/10: ladvise speed: 1.38834
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.18116
Iter 4/10: OSS cache speed: 1.15054
Iter 4/10: ladvise speed: 1.27416
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.930505
Iter 5/10: OSS cache speed: 1.22131
Iter 5/10: ladvise speed: 1.57788
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.907051
Iter 6/10: OSS cache speed: 0.925896
Iter 6/10: ladvise speed: 1.27747
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.11234
Iter 7/10: OSS cache speed: 1.24223
Iter 7/10: ladvise speed: 1.32103
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.21437
Iter 8/10: OSS cache speed: 1.3495
Iter 8/10: ladvise speed: 1.12025
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.969307
Iter 9/10: OSS cache speed: 1.14861
Iter 9/10: ladvise speed: 1.393
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.961927
Iter 10/10: OSS cache speed: 1.21104
Iter 10/10: ladvise speed: 1.09474
Average uncached read: 1.09
Average speedup with OSS cached read:  1.28 = +17%
Average speedup with ladvise willread:  1.34 = +22%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0