== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:02:13 (1789023733)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.2183 s, 9.3 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-ffff89d3851e0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.449575
Iter 1/10: OSS cache speed: 0.466652
Iter 1/10: ladvise speed: 0.442746
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.481061
Iter 2/10: OSS cache speed: 0.454251
Iter 2/10: ladvise speed: 0.448
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.421379
Iter 3/10: OSS cache speed: 0.486393
Iter 3/10: ladvise speed: 0.467716
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.438864
Iter 4/10: OSS cache speed: 0.487717
Iter 4/10: ladvise speed: 0.452195
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.452542
Iter 5/10: OSS cache speed: 0.479923
Iter 5/10: ladvise speed: 0.438355
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.401567
Iter 6/10: OSS cache speed: 0.442235
Iter 6/10: ladvise speed: 0.39593
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.420727
Iter 7/10: OSS cache speed: 0.412998
Iter 7/10: ladvise speed: 0.436443
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.459022
Iter 8/10: OSS cache speed: 0.380143
Iter 8/10: ladvise speed: 0.426074
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.475793
Iter 9/10: OSS cache speed: 0.438319
Iter 9/10: ladvise speed: 0.450658
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.488489
Iter 10/10: OSS cache speed: 0.457121
Iter 10/10: ladvise speed: 0.430475
Average uncached read: .44
Average speedup with OSS cached read:  .45 = +2%
Average speedup with ladvise willread:  .43 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0