== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:45:37 (1778355937)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.20538 s, 20.1 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-ffff8b71182c2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.02327
Iter 1/10: OSS cache speed: 2.12384
Iter 1/10: ladvise speed: 2.20408
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.29615
Iter 2/10: OSS cache speed: 1.13211
Iter 2/10: ladvise speed: 1.53355
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.20288
Iter 3/10: OSS cache speed: 1.86582
Iter 3/10: ladvise speed: 2.07941
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.64517
Iter 4/10: OSS cache speed: 1.71509
Iter 4/10: ladvise speed: 1.31169
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.38732
Iter 5/10: OSS cache speed: 1.25759
Iter 5/10: ladvise speed: 1.17069
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.00041
Iter 6/10: OSS cache speed: 1.71148
Iter 6/10: ladvise speed: 1.04275
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.07023
Iter 7/10: OSS cache speed: 1.01309
Iter 7/10: ladvise speed: 1.05422
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.18077
Iter 8/10: OSS cache speed: 1.00063
Iter 8/10: ladvise speed: 1.07776
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.02218
Iter 9/10: OSS cache speed: 1.01783
Iter 9/10: ladvise speed: 1.40173
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.029
Iter 10/10: OSS cache speed: 1.01551
Iter 10/10: ladvise speed: 1.03635
Average uncached read: 1.28
Average speedup with OSS cached read:  1.38 = +7%
Average speedup with ladvise willread:  1.39 = +8%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0