== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:47:57 (1787820477)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.6171 s, 7.7 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-ffff96fa867a4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.410504
Iter 1/10: OSS cache speed: 0.351333
Iter 1/10: ladvise speed: 0.415919
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.38843
Iter 2/10: OSS cache speed: 0.434171
Iter 2/10: ladvise speed: 0.460479
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394624
Iter 3/10: OSS cache speed: 0.444108
Iter 3/10: ladvise speed: 0.396302
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.371468
Iter 4/10: OSS cache speed: 0.374477
Iter 4/10: ladvise speed: 0.357965
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.389945
Iter 5/10: OSS cache speed: 0.404231
Iter 5/10: ladvise speed: 0.427951
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.362996
Iter 6/10: OSS cache speed: 0.438502
Iter 6/10: ladvise speed: 0.449642
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.422969
Iter 7/10: OSS cache speed: 0.465185
Iter 7/10: ladvise speed: 0.417704
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.362945
Iter 8/10: OSS cache speed: 0.424547
Iter 8/10: ladvise speed: 0.421158
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.400826
Iter 9/10: OSS cache speed: 0.41251
Iter 9/10: ladvise speed: 0.443482
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.359151
Iter 10/10: OSS cache speed: 0.429764
Iter 10/10: ladvise speed: 0.43959
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0