== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:51:08 (1783140668)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.335 s, 11.2 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-ffff9a77069bd000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.497464
Iter 1/10: OSS cache speed: 0.510089
Iter 1/10: ladvise speed: 0.498729
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.550942
Iter 2/10: OSS cache speed: 0.540381
Iter 2/10: ladvise speed: 0.578523
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.637122
Iter 3/10: OSS cache speed: 0.649708
Iter 3/10: ladvise speed: 0.770294
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.749253
Iter 4/10: OSS cache speed: 0.634382
Iter 4/10: ladvise speed: 0.316033
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.321562
Iter 5/10: OSS cache speed: 0.420363
Iter 5/10: ladvise speed: 0.405725
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356654
Iter 6/10: OSS cache speed: 0.424896
Iter 6/10: ladvise speed: 0.421054
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.431743
Iter 7/10: OSS cache speed: 0.417635
Iter 7/10: ladvise speed: 0.411156
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.405722
Iter 8/10: OSS cache speed: 0.400247
Iter 8/10: ladvise speed: 0.422564
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.453183
Iter 9/10: OSS cache speed: 0.453517
Iter 9/10: ladvise speed: 0.423556
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.508832
Iter 10/10: OSS cache speed: 0.502971
Iter 10/10: ladvise speed: 0.508586
Average uncached read: .49
Average speedup with OSS cached read:  .49 = +0%
Average speedup with ladvise willread:  .47 = +-4%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0