== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:23:28 (1787995408)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.2916 s, 7.9 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-ffff95cb98389800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.458248
Iter 1/10: OSS cache speed: 0.42161
Iter 1/10: ladvise speed: 0.506005
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.427291
Iter 2/10: OSS cache speed: 0.41323
Iter 2/10: ladvise speed: 0.487419
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.471479
Iter 3/10: OSS cache speed: 0.554204
Iter 3/10: ladvise speed: 0.449344
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.445903
Iter 4/10: OSS cache speed: 0.467816
Iter 4/10: ladvise speed: 0.531241
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.494419
Iter 5/10: OSS cache speed: 0.525282
Iter 5/10: ladvise speed: 0.581029
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.47555
Iter 6/10: OSS cache speed: 0.453828
Iter 6/10: ladvise speed: 0.54107
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.507677
Iter 7/10: OSS cache speed: 0.588286
Iter 7/10: ladvise speed: 0.489505
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.408829
Iter 8/10: OSS cache speed: 0.425579
Iter 8/10: ladvise speed: 0.473777
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.478448
Iter 9/10: OSS cache speed: 0.443469
Iter 9/10: ladvise speed: 0.493608
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.380907
Iter 10/10: OSS cache speed: 0.45385
Iter 10/10: ladvise speed: 0.483537
Average uncached read: .45
Average speedup with OSS cached read:  .47 = +4%
Average speedup with ladvise willread:  .50 = +11%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0