== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:44:11 (1731347051)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.46109 s, 30.3 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-ffff8800b3472800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.65124
Iter 1/10: OSS cache speed: 2.68831
Iter 1/10: ladvise speed: 2.72164
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.68273
Iter 2/10: OSS cache speed: 2.67672
Iter 2/10: ladvise speed: 2.68233
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.71944
Iter 3/10: OSS cache speed: 2.68399
Iter 3/10: ladvise speed: 2.59381
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.42385
Iter 4/10: OSS cache speed: 2.58217
Iter 4/10: ladvise speed: 2.49697
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.32606
Iter 5/10: OSS cache speed: 2.49893
Iter 5/10: ladvise speed: 2.2793
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.74157
Iter 6/10: OSS cache speed: 2.71382
Iter 6/10: ladvise speed: 2.77904
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.87626
Iter 7/10: OSS cache speed: 2.90452
Iter 7/10: ladvise speed: 2.8842
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.58621
Iter 8/10: OSS cache speed: 2.66259
Iter 8/10: ladvise speed: 2.5137
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.44346
Iter 9/10: OSS cache speed: 2.47626
Iter 9/10: ladvise speed: 1.95098
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.87643
Iter 10/10: OSS cache speed: 2.47439
Iter 10/10: ladvise speed: 2.77873
Average uncached read: 2.53
Average speedup with OSS cached read: 2.63 = +3.95%
Average speedup with ladvise willread: 2.56 = +1.18%
Speedup with OSS cached read less than 20%, got 3.95%. Skipping ladvise willread check.
fail_loc=0