== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:54:15 (1787842455)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7616 s, 8.9 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-ffff8920c54b1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.356964
Iter 1/10: OSS cache speed: 0.47804
Iter 1/10: ladvise speed: 0.428932
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.454856
Iter 2/10: OSS cache speed: 0.500128
Iter 2/10: ladvise speed: 0.48185
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.436208
Iter 3/10: OSS cache speed: 0.494499
Iter 3/10: ladvise speed: 0.531082
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.410369
Iter 4/10: OSS cache speed: 0.523801
Iter 4/10: ladvise speed: 0.474567
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.412604
Iter 5/10: OSS cache speed: 0.472399
Iter 5/10: ladvise speed: 0.464822
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.420005
Iter 6/10: OSS cache speed: 0.477775
Iter 6/10: ladvise speed: 0.441367
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.437681
Iter 7/10: OSS cache speed: 0.472059
Iter 7/10: ladvise speed: 0.47831
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.451322
Iter 8/10: OSS cache speed: 0.53381
Iter 8/10: ladvise speed: 0.497846
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.396428
Iter 9/10: OSS cache speed: 0.472596
Iter 9/10: ladvise speed: 0.501089
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.435829
Iter 10/10: OSS cache speed: 0.463553
Iter 10/10: ladvise speed: 0.40904
Average uncached read: .42
Average speedup with OSS cached read:  .48 = +14%
Average speedup with ladvise willread:  .47 = +11%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0