== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:48:48 (1748868528)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.95049 s, 35.5 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-ffff8800aae6d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.55251
Iter 1/10: OSS cache speed: 3.01296
Iter 1/10: ladvise speed: 2.93807
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.61277
Iter 2/10: OSS cache speed: 2.94859
Iter 2/10: ladvise speed: 3.05468
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.79157
Iter 3/10: OSS cache speed: 3.14801
Iter 3/10: ladvise speed: 3.1179
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.95914
Iter 4/10: OSS cache speed: 3.18373
Iter 4/10: ladvise speed: 3.1546
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.73159
Iter 5/10: OSS cache speed: 3.02536
Iter 5/10: ladvise speed: 2.94032
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.6862
Iter 6/10: OSS cache speed: 2.9542
Iter 6/10: ladvise speed: 3.10388
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.80784
Iter 7/10: OSS cache speed: 3.04577
Iter 7/10: ladvise speed: 3.11879
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.81706
Iter 8/10: OSS cache speed: 3.0837
Iter 8/10: ladvise speed: 3.20895
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.85273
Iter 9/10: OSS cache speed: 3.04988
Iter 9/10: ladvise speed: 3.09508
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.43787
Iter 10/10: OSS cache speed: 3.01558
Iter 10/10: ladvise speed: 3.0549
Average uncached read: 2.72
Average speedup with OSS cached read:  3.04 = +11%
Average speedup with ladvise willread:  3.07 = +12%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0