== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:23:05 (1744536185)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.54655 s, 41.2 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-ffff8800b6f8c800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.32105
Iter 1/10: OSS cache speed: 3.01053
Iter 1/10: ladvise speed: 2.72005
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.89058
Iter 2/10: OSS cache speed: 2.77199
Iter 2/10: ladvise speed: 1.92892
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.63632
Iter 3/10: OSS cache speed: 2.68754
Iter 3/10: ladvise speed: 3.03505
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.70678
Iter 4/10: OSS cache speed: 3.25109
Iter 4/10: ladvise speed: 3.33588
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.66081
Iter 5/10: OSS cache speed: 3.3207
Iter 5/10: ladvise speed: 1.87187
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.00374
Iter 6/10: OSS cache speed: 2.37086
Iter 6/10: ladvise speed: 2.30051
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.0077
Iter 7/10: OSS cache speed: 2.15727
Iter 7/10: ladvise speed: 2.14358
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.78808
Iter 8/10: OSS cache speed: 2.09908
Iter 8/10: ladvise speed: 1.72041
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.67406
Iter 9/10: OSS cache speed: 2.05123
Iter 9/10: ladvise speed: 2.39866
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.66623
Iter 10/10: OSS cache speed: 1.90168
Iter 10/10: ladvise speed: 1.62004
Average uncached read: 2.23
Average speedup with OSS cached read:  2.56 = +14%
Average speedup with ladvise willread:  2.30 = +3%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0