== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:16:23 (1753427783)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.75137 s, 18.2 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-ffffa092d0866000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.98631
Iter 1/10: OSS cache speed: 2.23144
Iter 1/10: ladvise speed: 2.35172
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.08228
Iter 2/10: OSS cache speed: 2.23504
Iter 2/10: ladvise speed: 2.46068
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.17981
Iter 3/10: OSS cache speed: 2.5628
Iter 3/10: ladvise speed: 2.58811
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.1864
Iter 4/10: OSS cache speed: 2.46
Iter 4/10: ladvise speed: 2.55124
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.4132
Iter 5/10: OSS cache speed: 2.39316
Iter 5/10: ladvise speed: 2.34599
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.13439
Iter 6/10: OSS cache speed: 2.34731
Iter 6/10: ladvise speed: 2.35338
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.16619
Iter 7/10: OSS cache speed: 2.47129
Iter 7/10: ladvise speed: 2.44532
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.27306
Iter 8/10: OSS cache speed: 2.44669
Iter 8/10: ladvise speed: 2.29557
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.876134
Iter 9/10: OSS cache speed: 1.32255
Iter 9/10: ladvise speed: 1.80232
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.1886
Iter 10/10: OSS cache speed: 1.29158
Iter 10/10: ladvise speed: 2.08867
Average uncached read: 1.94
Average speedup with OSS cached read:  2.17 = +11%
Average speedup with ladvise willread:  2.32 = +19%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0