== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:26:10 (1744129570)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.21922 s, 47.2 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-ffff8800b6d51800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.85883
Iter 1/10: OSS cache speed: 2.82355
Iter 1/10: ladvise speed: 2.44846
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.63486
Iter 2/10: OSS cache speed: 2.7059
Iter 2/10: ladvise speed: 2.74651
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.76629
Iter 3/10: OSS cache speed: 2.67329
Iter 3/10: ladvise speed: 2.78382
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.79722
Iter 4/10: OSS cache speed: 2.66945
Iter 4/10: ladvise speed: 2.79872
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.81343
Iter 5/10: OSS cache speed: 2.62012
Iter 5/10: ladvise speed: 1.9101
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.05397
Iter 6/10: OSS cache speed: 2.42234
Iter 6/10: ladvise speed: 2.68021
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.76965
Iter 7/10: OSS cache speed: 2.59663
Iter 7/10: ladvise speed: 2.7559
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.6909
Iter 8/10: OSS cache speed: 2.47897
Iter 8/10: ladvise speed: 2.70994
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.67827
Iter 9/10: OSS cache speed: 1.62307
Iter 9/10: ladvise speed: 1.74726
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.87431
Iter 10/10: OSS cache speed: 2.78836
Iter 10/10: ladvise speed: 2.51999
Average uncached read: 2.59
Average speedup with OSS cached read:  2.54 = +-1%
Average speedup with ladvise willread:  2.51 = +-3%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0