== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:13:39 (1781237619)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.40589 s, 16.4 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-ffff90a286a23800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.950745
Iter 1/10: OSS cache speed: 0.911238
Iter 1/10: ladvise speed: 0.911013
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.76374
Iter 2/10: OSS cache speed: 0.870586
Iter 2/10: ladvise speed: 0.731617
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.753232
Iter 3/10: OSS cache speed: 0.791198
Iter 3/10: ladvise speed: 0.732378
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.821959
Iter 4/10: OSS cache speed: 0.720551
Iter 4/10: ladvise speed: 0.874875
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.872324
Iter 5/10: OSS cache speed: 0.874254
Iter 5/10: ladvise speed: 1.00104
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.892669
Iter 6/10: OSS cache speed: 0.844807
Iter 6/10: ladvise speed: 0.853521
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.927445
Iter 7/10: OSS cache speed: 1.00219
Iter 7/10: ladvise speed: 0.849885
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.968494
Iter 8/10: OSS cache speed: 0.964819
Iter 8/10: ladvise speed: 0.82321
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.836274
Iter 9/10: OSS cache speed: 1.20196
Iter 9/10: ladvise speed: 1.26082
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.17496
Iter 10/10: OSS cache speed: 1.21185
Iter 10/10: ladvise speed: 0.944925
Average uncached read: .89
Average speedup with OSS cached read:  .93 = +4%
Average speedup with ladvise willread:  .89 = +0%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0