== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:19:33 (1787397573)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7471 s, 7.6 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-ffff901b58e4f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.368136
Iter 1/10: OSS cache speed: 0.428606
Iter 1/10: ladvise speed: 0.420537
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384582
Iter 2/10: OSS cache speed: 0.404745
Iter 2/10: ladvise speed: 0.40543
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.384818
Iter 3/10: OSS cache speed: 0.365646
Iter 3/10: ladvise speed: 0.41465
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.343215
Iter 4/10: OSS cache speed: 0.393452
Iter 4/10: ladvise speed: 0.335424
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.364582
Iter 5/10: OSS cache speed: 0.388423
Iter 5/10: ladvise speed: 0.426309
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.369281
Iter 6/10: OSS cache speed: 0.407356
Iter 6/10: ladvise speed: 0.430118
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.388643
Iter 7/10: OSS cache speed: 0.409145
Iter 7/10: ladvise speed: 0.385842
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.364899
Iter 8/10: OSS cache speed: 0.382921
Iter 8/10: ladvise speed: 0.382547
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385618
Iter 9/10: OSS cache speed: 0.335386
Iter 9/10: ladvise speed: 0.348118
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.346918
Iter 10/10: OSS cache speed: 0.392486
Iter 10/10: ladvise speed: 0.361135
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0