== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:53:34 (1789318414)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.02922 s, 17.4 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-ffff95fc9a407000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.9247
Iter 1/10: OSS cache speed: 2.19184
Iter 1/10: ladvise speed: 2.37519
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.34257
Iter 2/10: OSS cache speed: 2.78744
Iter 2/10: ladvise speed: 2.55786
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.32258
Iter 3/10: OSS cache speed: 2.54255
Iter 3/10: ladvise speed: 2.63341
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.36921
Iter 4/10: OSS cache speed: 2.54843
Iter 4/10: ladvise speed: 2.93314
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.4099
Iter 5/10: OSS cache speed: 2.61156
Iter 5/10: ladvise speed: 2.64091
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.41636
Iter 6/10: OSS cache speed: 2.59884
Iter 6/10: ladvise speed: 2.59758
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30423
Iter 7/10: OSS cache speed: 2.24435
Iter 7/10: ladvise speed: 2.59938
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.3991
Iter 8/10: OSS cache speed: 2.48555
Iter 8/10: ladvise speed: 2.59752
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.5082
Iter 9/10: OSS cache speed: 2.63231
Iter 9/10: ladvise speed: 2.59716
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.50451
Iter 10/10: OSS cache speed: 2.46958
Iter 10/10: ladvise speed: 2.17832
Average uncached read: 2.35
Average speedup with OSS cached read:  2.51 = +6%
Average speedup with ladvise willread:  2.57 = +9%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0