== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:48:30 (1787316510)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.2459 s, 6.9 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-ffff968b14533000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.37696
Iter 1/10: OSS cache speed: 0.335842
Iter 1/10: ladvise speed: 0.386065
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.3072
Iter 2/10: OSS cache speed: 0.346307
Iter 2/10: ladvise speed: 0.392629
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.31571
Iter 3/10: OSS cache speed: 0.380951
Iter 3/10: ladvise speed: 0.342236
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.319883
Iter 4/10: OSS cache speed: 0.299441
Iter 4/10: ladvise speed: 0.343629
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.339493
Iter 5/10: OSS cache speed: 0.346572
Iter 5/10: ladvise speed: 0.357405
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.339379
Iter 6/10: OSS cache speed: 0.397136
Iter 6/10: ladvise speed: 0.370465
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.361995
Iter 7/10: OSS cache speed: 0.384022
Iter 7/10: ladvise speed: 0.322221
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.283808
Iter 8/10: OSS cache speed: 0.391651
Iter 8/10: ladvise speed: 0.335352
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.325653
Iter 9/10: OSS cache speed: 0.348624
Iter 9/10: ladvise speed: 0.390023
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.315123
Iter 10/10: OSS cache speed: 0.351172
Iter 10/10: ladvise speed: 0.338631
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .35 = +9%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0