== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:48:12 (1785948492)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0378 s, 7.0 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-ffff966c8559f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.265112
Iter 1/10: OSS cache speed: 0.247755
Iter 1/10: ladvise speed: 0.205205
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.2186
Iter 2/10: OSS cache speed: 0.26331
Iter 2/10: ladvise speed: 0.243455
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.218166
Iter 3/10: OSS cache speed: 0.233441
Iter 3/10: ladvise speed: 0.27253
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.243973
Iter 4/10: OSS cache speed: 0.220722
Iter 4/10: ladvise speed: 0.304019
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.265583
Iter 5/10: OSS cache speed: 0.233746
Iter 5/10: ladvise speed: 0.271925
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.217285
Iter 6/10: OSS cache speed: 0.209148
Iter 6/10: ladvise speed: 0.235241
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.217698
Iter 7/10: OSS cache speed: 0.283987
Iter 7/10: ladvise speed: 0.21255
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.243666
Iter 8/10: OSS cache speed: 0.262713
Iter 8/10: ladvise speed: 0.209726
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.246954
Iter 9/10: OSS cache speed: 0.301279
Iter 9/10: ladvise speed: 0.226821
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.212624
Iter 10/10: OSS cache speed: 0.199167
Iter 10/10: ladvise speed: 0.23737
Average uncached read: .23
Average speedup with OSS cached read:  .24 = +4%
Average speedup with ladvise willread:  .24 = +4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0