== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:46:42 (1788914802)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4936 s, 7.8 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-ffffa0370505a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.329758
Iter 1/10: OSS cache speed: 0.36474
Iter 1/10: ladvise speed: 0.365375
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.322437
Iter 2/10: OSS cache speed: 0.357394
Iter 2/10: ladvise speed: 0.400043
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352077
Iter 3/10: OSS cache speed: 0.36207
Iter 3/10: ladvise speed: 0.307467
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.349164
Iter 4/10: OSS cache speed: 0.311862
Iter 4/10: ladvise speed: 0.310087
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.323985
Iter 5/10: OSS cache speed: 0.303053
Iter 5/10: ladvise speed: 0.258812
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.314852
Iter 6/10: OSS cache speed: 0.292932
Iter 6/10: ladvise speed: 0.29803
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.280213
Iter 7/10: OSS cache speed: 0.265006
Iter 7/10: ladvise speed: 0.273688
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.293103
Iter 8/10: OSS cache speed: 0.300306
Iter 8/10: ladvise speed: 0.266442
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.267474
Iter 9/10: OSS cache speed: 0.332504
Iter 9/10: ladvise speed: 0.298144
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.310149
Iter 10/10: OSS cache speed: 0.353563
Iter 10/10: ladvise speed: 0.465309
Average uncached read: .31
Average speedup with OSS cached read:  .32 = +3%
Average speedup with ladvise willread:  .32 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0