== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:48:19 (1778924899)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.5627 s, 7.2 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-ffff9da1c60e6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.285591
Iter 1/10: OSS cache speed: 0.2788
Iter 1/10: ladvise speed: 0.317041
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.299336
Iter 2/10: OSS cache speed: 0.287275
Iter 2/10: ladvise speed: 0.327809
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.303652
Iter 3/10: OSS cache speed: 0.313351
Iter 3/10: ladvise speed: 0.296114
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.322539
Iter 4/10: OSS cache speed: 0.32281
Iter 4/10: ladvise speed: 0.317036
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.311181
Iter 5/10: OSS cache speed: 0.303897
Iter 5/10: ladvise speed: 0.346275
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.27843
Iter 6/10: OSS cache speed: 0.339101
Iter 6/10: ladvise speed: 0.318039
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.277736
Iter 7/10: OSS cache speed: 0.296051
Iter 7/10: ladvise speed: 0.323538
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.306391
Iter 8/10: OSS cache speed: 0.29176
Iter 8/10: ladvise speed: 0.323469
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.339788
Iter 9/10: OSS cache speed: 0.347735
Iter 9/10: ladvise speed: 0.33559
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.3617
Iter 10/10: OSS cache speed: 0.365211
Iter 10/10: ladvise speed: 0.397229
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .33 = +10%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0