== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:14:02 (1735100042)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.73916 s, 28.0 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-ffff8800b6140000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.67039
Iter 1/10: OSS cache speed: 1.95267
Iter 1/10: ladvise speed: 2.62477
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.89784
Iter 2/10: OSS cache speed: 3.11975
Iter 2/10: ladvise speed: 3.05814
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.41553
Iter 3/10: OSS cache speed: 2.1303
Iter 3/10: ladvise speed: 3.0794
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.81748
Iter 4/10: OSS cache speed: 2.94796
Iter 4/10: ladvise speed: 2.86996
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.73221
Iter 5/10: OSS cache speed: 2.87434
Iter 5/10: ladvise speed: 2.72701
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.5776
Iter 6/10: OSS cache speed: 2.83887
Iter 6/10: ladvise speed: 2.9207
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.77514
Iter 7/10: OSS cache speed: 3.09243
Iter 7/10: ladvise speed: 2.85605
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.80945
Iter 8/10: OSS cache speed: 3.02813
Iter 8/10: ladvise speed: 1.78339
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.47087
Iter 9/10: OSS cache speed: 2.64421
Iter 9/10: ladvise speed: 2.72283
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.46427
Iter 10/10: OSS cache speed: 2.645
Iter 10/10: ladvise speed: 2.63142
Average uncached read: 2.56
Average speedup with OSS cached read:  2.72 = +6%
Average speedup with ladvise willread:  2.72 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0