== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:35:49 (1789353349)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.17722 s, 17.0 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-ffff9189cb3f0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.962584
Iter 1/10: OSS cache speed: 0.894577
Iter 1/10: ladvise speed: 0.865265
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.839083
Iter 2/10: OSS cache speed: 0.718775
Iter 2/10: ladvise speed: 0.992107
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.17574
Iter 3/10: OSS cache speed: 1.31713
Iter 3/10: ladvise speed: 1.48347
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.91996
Iter 4/10: OSS cache speed: 1.81616
Iter 4/10: ladvise speed: 2.00969
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.1093
Iter 5/10: OSS cache speed: 2.04354
Iter 5/10: ladvise speed: 2.08609
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.03473
Iter 6/10: OSS cache speed: 2.03643
Iter 6/10: ladvise speed: 2.15757
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.27277
Iter 7/10: OSS cache speed: 2.11102
Iter 7/10: ladvise speed: 2.10515
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.13201
Iter 8/10: OSS cache speed: 2.09754
Iter 8/10: ladvise speed: 2.05949
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.11488
Iter 9/10: OSS cache speed: 2.16954
Iter 9/10: ladvise speed: 2.10848
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02954
Iter 10/10: OSS cache speed: 1.99577
Iter 10/10: ladvise speed: 2.09271
Average uncached read: 1.75
Average speedup with OSS cached read:  1.72 = +-1%
Average speedup with ladvise willread:  1.79 = +2%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0