== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:59:20 (1742903960)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.57494 s, 40.7 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-ffff8800b58df000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.79683
Iter 1/10: OSS cache speed: 3.11166
Iter 1/10: ladvise speed: 3.2344
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.87794
Iter 2/10: OSS cache speed: 3.05776
Iter 2/10: ladvise speed: 3.26395
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.84257
Iter 3/10: OSS cache speed: 3.03616
Iter 3/10: ladvise speed: 3.2811
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.92119
Iter 4/10: OSS cache speed: 3.26662
Iter 4/10: ladvise speed: 1.6537
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.20814
Iter 5/10: OSS cache speed: 2.00101
Iter 5/10: ladvise speed: 2.27023
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.70579
Iter 6/10: OSS cache speed: 2.98209
Iter 6/10: ladvise speed: 2.9261
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.21472
Iter 7/10: OSS cache speed: 2.52973
Iter 7/10: ladvise speed: 2.67956
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.45982
Iter 8/10: OSS cache speed: 2.97495
Iter 8/10: ladvise speed: 3.38055
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.9585
Iter 9/10: OSS cache speed: 3.26268
Iter 9/10: ladvise speed: 3.0268
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.14729
Iter 10/10: OSS cache speed: 3.60716
Iter 10/10: ladvise speed: 3.32239
Average uncached read: 2.71
Average speedup with OSS cached read:  2.98 = +9%
Average speedup with ladvise willread:  2.90 = +7%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0