== sanity test 255a: check 'lfs ladvise -a willread' ===== 06:12:27 (1744020747)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.12338 s, 49.4 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-ffff88012c8a2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.40714
Iter 1/10: OSS cache speed: 1.43762
Iter 1/10: ladvise speed: 1.75289
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.42678
Iter 2/10: OSS cache speed: 1.39611
Iter 2/10: ladvise speed: 1.39224
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.43578
Iter 3/10: OSS cache speed: 1.37407
Iter 3/10: ladvise speed: 1.92645
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.37135
Iter 4/10: OSS cache speed: 1.33508
Iter 4/10: ladvise speed: 1.87265
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.29765
Iter 5/10: OSS cache speed: 1.62692
Iter 5/10: ladvise speed: 2.31122
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.38934
Iter 6/10: OSS cache speed: 1.31322
Iter 6/10: ladvise speed: 1.44906
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.81004
Iter 7/10: OSS cache speed: 1.83876
Iter 7/10: ladvise speed: 1.83157
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.43962
Iter 8/10: OSS cache speed: 2.34713
Iter 8/10: ladvise speed: 1.97796
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.34668
Iter 9/10: OSS cache speed: 1.40119
Iter 9/10: ladvise speed: 1.75089
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.36048
Iter 10/10: OSS cache speed: 1.34322
Iter 10/10: ladvise speed: 1.60205
Average uncached read: 1.42
Average speedup with OSS cached read:  1.54 = +8%
Average speedup with ladvise willread:  1.78 = +25%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0