== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:37:47 (1740674267)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.39989 s, 43.7 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-ffff8800b60e7800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.75472
Iter 1/10: OSS cache speed: 2.15828
Iter 1/10: ladvise speed: 1.78765
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.85495
Iter 2/10: OSS cache speed: 2.43548
Iter 2/10: ladvise speed: 2.45924
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.61004
Iter 3/10: OSS cache speed: 2.61744
Iter 3/10: ladvise speed: 1.22306
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.0542
Iter 4/10: OSS cache speed: 1.51905
Iter 4/10: ladvise speed: 1.69608
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.73204
Iter 5/10: OSS cache speed: 2.11653
Iter 5/10: ladvise speed: 2.48314
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.10554
Iter 6/10: OSS cache speed: 1.98736
Iter 6/10: ladvise speed: 2.30489
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.80422
Iter 7/10: OSS cache speed: 2.51758
Iter 7/10: ladvise speed: 2.4897
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.58193
Iter 8/10: OSS cache speed: 2.68923
Iter 8/10: ladvise speed: 2.73699
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.59404
Iter 9/10: OSS cache speed: 2.70738
Iter 9/10: ladvise speed: 2.68991
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.56462
Iter 10/10: OSS cache speed: 2.54215
Iter 10/10: ladvise speed: 2.49261
Average uncached read: 2.26
Average speedup with OSS cached read:  2.32 = +2%
Average speedup with ladvise willread:  2.23 = +-1%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0