== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:48:28 (1746067708)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.16503 s, 33.1 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-ffff8800ab248800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.14518
Iter 1/10: OSS cache speed: 1.15817
Iter 1/10: ladvise speed: 1.06326
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.04345
Iter 2/10: OSS cache speed: 1.08329
Iter 2/10: ladvise speed: 0.935217
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.03457
Iter 3/10: OSS cache speed: 1.00004
Iter 3/10: ladvise speed: 0.82275
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.808348
Iter 4/10: OSS cache speed: 0.812438
Iter 4/10: ladvise speed: 0.861822
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.913237
Iter 5/10: OSS cache speed: 0.843389
Iter 5/10: ladvise speed: 0.977667
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.90774
Iter 6/10: OSS cache speed: 0.813499
Iter 6/10: ladvise speed: 0.880512
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.950487
Iter 7/10: OSS cache speed: 0.855622
Iter 7/10: ladvise speed: 0.832132
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.824073
Iter 8/10: OSS cache speed: 0.77529
Iter 8/10: ladvise speed: 0.814617
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.738843
Iter 9/10: OSS cache speed: 0.826349
Iter 9/10: ladvise speed: 0.801591
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.753955
Iter 10/10: OSS cache speed: 0.855415
Iter 10/10: ladvise speed: 0.687206
Average uncached read: .91
Average speedup with OSS cached read:  .90 = +-1%
Average speedup with ladvise willread:  .86 = +-5%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0