== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:13:22 (1761286402)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.80897 s, 11.9 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-ffff91154388f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.486364
Iter 1/10: OSS cache speed: 0.531085
Iter 1/10: ladvise speed: 0.512593
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.448607
Iter 2/10: OSS cache speed: 0.467314
Iter 2/10: ladvise speed: 0.495493
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.520682
Iter 3/10: OSS cache speed: 0.486284
Iter 3/10: ladvise speed: 0.515668
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.527989
Iter 4/10: OSS cache speed: 0.533655
Iter 4/10: ladvise speed: 0.539416
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.401399
Iter 5/10: OSS cache speed: 0.420915
Iter 5/10: ladvise speed: 0.438537
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.498774
Iter 6/10: OSS cache speed: 0.443674
Iter 6/10: ladvise speed: 0.436207
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.411596
Iter 7/10: OSS cache speed: 0.415008
Iter 7/10: ladvise speed: 0.469154
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.431892
Iter 8/10: OSS cache speed: 0.522772
Iter 8/10: ladvise speed: 0.611972
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.586023
Iter 9/10: OSS cache speed: 0.637793
Iter 9/10: ladvise speed: 0.631519
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.580893
Iter 10/10: OSS cache speed: 0.31761
Iter 10/10: ladvise speed: 0.502131
Average uncached read: .48
Average speedup with OSS cached read:  .47 = +-2%
Average speedup with ladvise willread:  .51 = +6%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0