== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:25:23 (1741627523)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.36696 s, 44.3 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-ffff8800b6243800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.54911
Iter 1/10: OSS cache speed: 2.88633
Iter 1/10: ladvise speed: 2.85839
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.76215
Iter 2/10: OSS cache speed: 3.15191
Iter 2/10: ladvise speed: 3.24717
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.95908
Iter 3/10: OSS cache speed: 3.30043
Iter 3/10: ladvise speed: 3.19712
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.94523
Iter 4/10: OSS cache speed: 2.91129
Iter 4/10: ladvise speed: 2.81828
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.69392
Iter 5/10: OSS cache speed: 3.25499
Iter 5/10: ladvise speed: 2.45464
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.60616
Iter 6/10: OSS cache speed: 2.74631
Iter 6/10: ladvise speed: 2.17779
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.44987
Iter 7/10: OSS cache speed: 2.81886
Iter 7/10: ladvise speed: 2.97918
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.69813
Iter 8/10: OSS cache speed: 2.8403
Iter 8/10: ladvise speed: 2.8304
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.79926
Iter 9/10: OSS cache speed: 3.46825
Iter 9/10: ladvise speed: 3.13993
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.85136
Iter 10/10: OSS cache speed: 2.99055
Iter 10/10: ladvise speed: 3.08636
Average uncached read: 2.73
Average speedup with OSS cached read:  3.03 = +10%
Average speedup with ladvise willread:  2.87 = +5%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0