== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:25:37 (1768253137)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.6489 s, 9.0 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-ffff9c62d00e1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.39749
Iter 1/10: OSS cache speed: 0.418853
Iter 1/10: ladvise speed: 0.401827
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.451398
Iter 2/10: OSS cache speed: 0.483046
Iter 2/10: ladvise speed: 0.550225
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.566148
Iter 3/10: OSS cache speed: 0.504753
Iter 3/10: ladvise speed: 0.495466
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.479486
Iter 4/10: OSS cache speed: 0.539197
Iter 4/10: ladvise speed: 0.510958
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.534792
Iter 5/10: OSS cache speed: 0.549866
Iter 5/10: ladvise speed: 0.510083
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.543822
Iter 6/10: OSS cache speed: 0.54911
Iter 6/10: ladvise speed: 0.532338
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.545305
Iter 7/10: OSS cache speed: 0.568696
Iter 7/10: ladvise speed: 0.570807
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.57355
Iter 8/10: OSS cache speed: 0.630808
Iter 8/10: ladvise speed: 0.531572
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.31684
Iter 9/10: OSS cache speed: 0.476995
Iter 9/10: ladvise speed: 0.430394
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.43289
Iter 10/10: OSS cache speed: 0.401678
Iter 10/10: ladvise speed: 0.441447
Average uncached read: .48
Average speedup with OSS cached read:  .51 = +6%
Average speedup with ladvise willread:  .49 = +2%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0