== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:33:18 (1752510798)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.93365 s, 17.7 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-ffff897818076000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.82016
Iter 1/10: OSS cache speed: 2.15412
Iter 1/10: ladvise speed: 1.85079
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.22597
Iter 2/10: OSS cache speed: 2.0524
Iter 2/10: ladvise speed: 2.40105
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.39191
Iter 3/10: OSS cache speed: 2.58302
Iter 3/10: ladvise speed: 2.3957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.40717
Iter 4/10: OSS cache speed: 0.936981
Iter 4/10: ladvise speed: 1.66156
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.989112
Iter 5/10: OSS cache speed: 0.955195
Iter 5/10: ladvise speed: 1.93419
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.9718
Iter 6/10: OSS cache speed: 2.18326
Iter 6/10: ladvise speed: 1.79133
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.90015
Iter 7/10: OSS cache speed: 2.29788
Iter 7/10: ladvise speed: 2.36752
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.29072
Iter 8/10: OSS cache speed: 2.4136
Iter 8/10: ladvise speed: 2.47962
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.08152
Iter 9/10: OSS cache speed: 2.39985
Iter 9/10: ladvise speed: 2.38465
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.31447
Iter 10/10: OSS cache speed: 1.32416
Iter 10/10: ladvise speed: 2.04377
Average uncached read: 1.93
Average speedup with OSS cached read:  1.93 = +0%
Average speedup with ladvise willread:  2.13 = +10%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0