== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:32:50 (1788643970)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 17.6126 s, 6.0 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-ffff9a68a007f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.490433
Iter 1/10: OSS cache speed: 0.428114
Iter 1/10: ladvise speed: 0.399933
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.31474
Iter 2/10: OSS cache speed: 0.406531
Iter 2/10: ladvise speed: 0.34187
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387728
Iter 3/10: OSS cache speed: 0.345603
Iter 3/10: ladvise speed: 0.409821
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.305789
Iter 4/10: OSS cache speed: 0.392309
Iter 4/10: ladvise speed: 0.494892
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387738
Iter 5/10: OSS cache speed: 0.46834
Iter 5/10: ladvise speed: 0.478869
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403442
Iter 6/10: OSS cache speed: 0.444931
Iter 6/10: ladvise speed: 0.479251
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.480971
Iter 7/10: OSS cache speed: 0.49955
Iter 7/10: ladvise speed: 0.412605
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.407343
Iter 8/10: OSS cache speed: 0.443283
Iter 8/10: ladvise speed: 0.313978
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.330497
Iter 9/10: OSS cache speed: 0.381033
Iter 9/10: ladvise speed: 0.340042
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.378456
Iter 10/10: OSS cache speed: 0.370295
Iter 10/10: ladvise speed: 0.483031
Average uncached read: .38
Average speedup with OSS cached read:  .41 = +7%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0