== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:03:57 (1746626637)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.82363 s, 37.1 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-ffff88012a5bf000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.08045
Iter 1/10: OSS cache speed: 2.47808
Iter 1/10: ladvise speed: 2.52136
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.6951
Iter 2/10: OSS cache speed: 3.45134
Iter 2/10: ladvise speed: 3.08235
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.78953
Iter 3/10: OSS cache speed: 2.15783
Iter 3/10: ladvise speed: 1.90577
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.88608
Iter 4/10: OSS cache speed: 2.50343
Iter 4/10: ladvise speed: 3.34019
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.50333
Iter 5/10: OSS cache speed: 2.54948
Iter 5/10: ladvise speed: 2.9954
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.10477
Iter 6/10: OSS cache speed: 3.13113
Iter 6/10: ladvise speed: 3.15806
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.94309
Iter 7/10: OSS cache speed: 3.08808
Iter 7/10: ladvise speed: 2.96672
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.70113
Iter 8/10: OSS cache speed: 3.04189
Iter 8/10: ladvise speed: 3.11059
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.75105
Iter 9/10: OSS cache speed: 3.0438
Iter 9/10: ladvise speed: 2.96069
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.68839
Iter 10/10: OSS cache speed: 2.92267
Iter 10/10: ladvise speed: 2.99968
Average uncached read: 2.51
Average speedup with OSS cached read:  2.83 = +12%
Average speedup with ladvise willread:  2.90 = +15%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0