== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:53:44 (1739505224)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 5.45757 s, 19.2 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-ffff8800b5933800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.786741
Iter 1/10: OSS cache speed: 1.12311
Iter 1/10: ladvise speed: 0.990421
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.92457
Iter 2/10: OSS cache speed: 0.947254
Iter 2/10: ladvise speed: 1.04729
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.855238
Iter 3/10: OSS cache speed: 0.936092
Iter 3/10: ladvise speed: 0.992022
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.826609
Iter 4/10: OSS cache speed: 1.0627
Iter 4/10: ladvise speed: 1.0668
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.967325
Iter 5/10: OSS cache speed: 1.14339
Iter 5/10: ladvise speed: 1.11925
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.993283
Iter 6/10: OSS cache speed: 1.06266
Iter 6/10: ladvise speed: 1.09981
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.705115
Iter 7/10: OSS cache speed: 0.999524
Iter 7/10: ladvise speed: 1.06637
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.03736
Iter 8/10: OSS cache speed: 1.15854
Iter 8/10: ladvise speed: 1.08318
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.922147
Iter 9/10: OSS cache speed: 1.16319
Iter 9/10: ladvise speed: 1.03747
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.89032
Iter 10/10: OSS cache speed: 0.911297
Iter 10/10: ladvise speed: 0.982058
Average uncached read: .89
Average speedup with OSS cached read:  1.05 = +17%
Average speedup with ladvise willread:  1.04 = +16%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0