== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:12:59 (1787850779)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.0037 s, 7.0 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-ffff9cd687cf3000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.285803
Iter 1/10: OSS cache speed: 0.393782
Iter 1/10: ladvise speed: 0.428224
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.397716
Iter 2/10: OSS cache speed: 0.409007
Iter 2/10: ladvise speed: 0.427665
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.299762
Iter 3/10: OSS cache speed: 0.384931
Iter 3/10: ladvise speed: 0.406801
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.339899
Iter 4/10: OSS cache speed: 0.335327
Iter 4/10: ladvise speed: 0.370913
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.256408
Iter 5/10: OSS cache speed: 0.314084
Iter 5/10: ladvise speed: 0.351726
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.354913
Iter 6/10: OSS cache speed: 0.31867
Iter 6/10: ladvise speed: 0.350937
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.282249
Iter 7/10: OSS cache speed: 0.307616
Iter 7/10: ladvise speed: 0.339758
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.329404
Iter 8/10: OSS cache speed: 0.296332
Iter 8/10: ladvise speed: 0.308637
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.289394
Iter 9/10: OSS cache speed: 0.301563
Iter 9/10: ladvise speed: 0.303997
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.385149
Iter 10/10: OSS cache speed: 0.350154
Iter 10/10: ladvise speed: 0.402622
Average uncached read: .32
Average speedup with OSS cached read:  .34 = +6%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0