== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:03:16 (1789135396)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9226 s, 7.5 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-ffff8bdbca059000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.341271
Iter 1/10: OSS cache speed: 0.399931
Iter 1/10: ladvise speed: 0.371904
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.335831
Iter 2/10: OSS cache speed: 0.367023
Iter 2/10: ladvise speed: 0.436073
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.384549
Iter 3/10: OSS cache speed: 0.452716
Iter 3/10: ladvise speed: 0.347666
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.347817
Iter 4/10: OSS cache speed: 0.448285
Iter 4/10: ladvise speed: 0.423321
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.33728
Iter 5/10: OSS cache speed: 0.37891
Iter 5/10: ladvise speed: 0.395819
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.34696
Iter 6/10: OSS cache speed: 0.421311
Iter 6/10: ladvise speed: 0.423046
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.385366
Iter 7/10: OSS cache speed: 0.407367
Iter 7/10: ladvise speed: 0.387537
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.354484
Iter 8/10: OSS cache speed: 0.387404
Iter 8/10: ladvise speed: 0.364754
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.3858
Iter 9/10: OSS cache speed: 0.369941
Iter 9/10: ladvise speed: 0.426187
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.37708
Iter 10/10: OSS cache speed: 0.363522
Iter 10/10: ladvise speed: 0.395206
Average uncached read: .35
Average speedup with OSS cached read:  .39 = +11%
Average speedup with ladvise willread:  .39 = +11%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0