== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:25:48 (1744129548)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.72983 s, 38.4 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-ffff8800b5c08800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.87842
Iter 1/10: OSS cache speed: 3.13332
Iter 1/10: ladvise speed: 3.31601
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.04525
Iter 2/10: OSS cache speed: 2.35113
Iter 2/10: ladvise speed: 2.82205
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.89211
Iter 3/10: OSS cache speed: 3.15987
Iter 3/10: ladvise speed: 3.05996
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.86796
Iter 4/10: OSS cache speed: 3.27828
Iter 4/10: ladvise speed: 3.2314
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.01479
Iter 5/10: OSS cache speed: 3.34447
Iter 5/10: ladvise speed: 3.37367
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.93508
Iter 6/10: OSS cache speed: 2.97712
Iter 6/10: ladvise speed: 3.17424
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.72202
Iter 7/10: OSS cache speed: 3.16554
Iter 7/10: ladvise speed: 3.22835
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.98268
Iter 8/10: OSS cache speed: 3.25155
Iter 8/10: ladvise speed: 3.1026
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.86516
Iter 9/10: OSS cache speed: 3.28633
Iter 9/10: ladvise speed: 3.18717
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.89149
Iter 10/10: OSS cache speed: 3.22656
Iter 10/10: ladvise speed: 2.90463
Average uncached read: 2.90
Average speedup with OSS cached read:  3.11 = +7%
Average speedup with ladvise willread:  3.14 = +8%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0