== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:22:36 (1786018956)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.5987 s, 9.9 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-ffff9c0403e66800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.337813
Iter 1/10: OSS cache speed: 0.337292
Iter 1/10: ladvise speed: 0.275671
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.269118
Iter 2/10: OSS cache speed: 0.319868
Iter 2/10: ladvise speed: 0.35509
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.298255
Iter 3/10: OSS cache speed: 0.321964
Iter 3/10: ladvise speed: 0.267273
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.323171
Iter 4/10: OSS cache speed: 0.27978
Iter 4/10: ladvise speed: 0.335501
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.348796
Iter 5/10: OSS cache speed: 0.307186
Iter 5/10: ladvise speed: 0.322676
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.317305
Iter 6/10: OSS cache speed: 0.285619
Iter 6/10: ladvise speed: 0.361043
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.296774
Iter 7/10: OSS cache speed: 0.316689
Iter 7/10: ladvise speed: 0.290571
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.322558
Iter 8/10: OSS cache speed: 0.29568
Iter 8/10: ladvise speed: 0.363126
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.331522
Iter 9/10: OSS cache speed: 0.320837
Iter 9/10: ladvise speed: 0.275033
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.279359
Iter 10/10: OSS cache speed: 0.2779
Iter 10/10: ladvise speed: 0.274327
Average uncached read: .31
Average speedup with OSS cached read:  .30 = +-3%
Average speedup with ladvise willread:  .31 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0