== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:21:42 (1735100502)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.79366 s, 37.5 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-ffff8800b6334000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.504
Iter 1/10: OSS cache speed: 2.96559
Iter 1/10: ladvise speed: 2.90807
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.81735
Iter 2/10: OSS cache speed: 3.08711
Iter 2/10: ladvise speed: 2.91175
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.66033
Iter 3/10: OSS cache speed: 2.94898
Iter 3/10: ladvise speed: 2.82151
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.56013
Iter 4/10: OSS cache speed: 3.21753
Iter 4/10: ladvise speed: 3.0871
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.60378
Iter 5/10: OSS cache speed: 2.72401
Iter 5/10: ladvise speed: 1.44321
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.55203
Iter 6/10: OSS cache speed: 1.32151
Iter 6/10: ladvise speed: 1.76454
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.57679
Iter 7/10: OSS cache speed: 2.27838
Iter 7/10: ladvise speed: 1.76774
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.02325
Iter 8/10: OSS cache speed: 2.07343
Iter 8/10: ladvise speed: 1.71287
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.00428
Iter 9/10: OSS cache speed: 2.22544
Iter 9/10: ladvise speed: 2.48759
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.90879
Iter 10/10: OSS cache speed: 2.91911
Iter 10/10: ladvise speed: 3.0534
Average uncached read: 2.32
Average speedup with OSS cached read:  2.57 = +10%
Average speedup with ladvise willread:  2.39 = +3%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0