== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:46:43 (1784047603)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.9729 s, 6.6 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-ffff89ffc6348000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.318031
Iter 1/10: OSS cache speed: 0.348825
Iter 1/10: ladvise speed: 0.419679
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.319097
Iter 2/10: OSS cache speed: 0.297262
Iter 2/10: ladvise speed: 0.380152
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.309053
Iter 3/10: OSS cache speed: 0.358107
Iter 3/10: ladvise speed: 0.321493
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.392099
Iter 4/10: OSS cache speed: 0.400571
Iter 4/10: ladvise speed: 0.384214
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.34669
Iter 5/10: OSS cache speed: 0.379721
Iter 5/10: ladvise speed: 0.458332
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.364287
Iter 6/10: OSS cache speed: 0.379762
Iter 6/10: ladvise speed: 0.398823
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.33268
Iter 7/10: OSS cache speed: 0.361312
Iter 7/10: ladvise speed: 0.41347
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.404606
Iter 8/10: OSS cache speed: 0.370025
Iter 8/10: ladvise speed: 0.50115
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.403773
Iter 9/10: OSS cache speed: 0.39562
Iter 9/10: ladvise speed: 0.358659
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.329202
Iter 10/10: OSS cache speed: 0.391141
Iter 10/10: ladvise speed: 0.339667
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .39 = +11%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0