== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:07:51 (1743509271)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.89635 s, 36.2 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-ffff88012a47f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.912
Iter 1/10: OSS cache speed: 3.19234
Iter 1/10: ladvise speed: 3.24031
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.89255
Iter 2/10: OSS cache speed: 3.2194
Iter 2/10: ladvise speed: 3.1944
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.91771
Iter 3/10: OSS cache speed: 3.09606
Iter 3/10: ladvise speed: 3.19247
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.6271
Iter 4/10: OSS cache speed: 2.77862
Iter 4/10: ladvise speed: 3.13848
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.78065
Iter 5/10: OSS cache speed: 3.10179
Iter 5/10: ladvise speed: 3.1923
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.92931
Iter 6/10: OSS cache speed: 2.59832
Iter 6/10: ladvise speed: 2.30996
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.19364
Iter 7/10: OSS cache speed: 2.33475
Iter 7/10: ladvise speed: 2.04726
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.85403
Iter 8/10: OSS cache speed: 2.16252
Iter 8/10: ladvise speed: 2.16293
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.73355
Iter 9/10: OSS cache speed: 1.79563
Iter 9/10: ladvise speed: 1.96716
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.79348
Iter 10/10: OSS cache speed: 1.6377
Iter 10/10: ladvise speed: 2.01289
Average uncached read: 2.46
Average speedup with OSS cached read:  2.59 = +5%
Average speedup with ladvise willread:  2.64 = +7%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0