== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:01:04 (1788584464)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4144 s, 9.2 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-ffff9f2de043b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.366067
Iter 1/10: OSS cache speed: 0.462029
Iter 1/10: ladvise speed: 0.37703
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.343086
Iter 2/10: OSS cache speed: 0.342128
Iter 2/10: ladvise speed: 0.340121
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.340733
Iter 3/10: OSS cache speed: 0.358999
Iter 3/10: ladvise speed: 0.387556
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.306881
Iter 4/10: OSS cache speed: 0.314982
Iter 4/10: ladvise speed: 0.368982
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.330313
Iter 5/10: OSS cache speed: 0.417261
Iter 5/10: ladvise speed: 0.431959
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.343074
Iter 6/10: OSS cache speed: 0.420975
Iter 6/10: ladvise speed: 0.403101
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.370188
Iter 7/10: OSS cache speed: 0.403575
Iter 7/10: ladvise speed: 0.332451
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.321366
Iter 8/10: OSS cache speed: 0.365286
Iter 8/10: ladvise speed: 0.326712
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.368292
Iter 9/10: OSS cache speed: 0.36475
Iter 9/10: ladvise speed: 0.396256
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.345155
Iter 10/10: OSS cache speed: 0.354743
Iter 10/10: ladvise speed: 0.371187
Average uncached read: .34
Average speedup with OSS cached read:  .38 = +11%
Average speedup with ladvise willread:  .37 = +8%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0