== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:40:56 (1781624456)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.4437 s, 14.1 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-ffff9146cbd6a000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.572629
Iter 1/10: OSS cache speed: 0.619603
Iter 1/10: ladvise speed: 0.646841
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.641334
Iter 2/10: OSS cache speed: 0.646825
Iter 2/10: ladvise speed: 0.391156
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301948
Iter 3/10: OSS cache speed: 0.364414
Iter 3/10: ladvise speed: 0.38848
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.366451
Iter 4/10: OSS cache speed: 0.386362
Iter 4/10: ladvise speed: 0.380384
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.42549
Iter 5/10: OSS cache speed: 0.456558
Iter 5/10: ladvise speed: 0.439565
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.458006
Iter 6/10: OSS cache speed: 0.476083
Iter 6/10: ladvise speed: 0.489402
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.465425
Iter 7/10: OSS cache speed: 0.462387
Iter 7/10: ladvise speed: 0.554395
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.527099
Iter 8/10: OSS cache speed: 0.531631
Iter 8/10: ladvise speed: 0.532008
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.499761
Iter 9/10: OSS cache speed: 0.543124
Iter 9/10: ladvise speed: 0.55009
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.578413
Iter 10/10: OSS cache speed: 0.579551
Iter 10/10: ladvise speed: 0.585219
Average uncached read: .48
Average speedup with OSS cached read:  .50 = +4%
Average speedup with ladvise willread:  .49 = +2%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0