== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:33:23 (1786754003)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.3371 s, 6.8 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-ffff8b5952a7f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.362924
Iter 1/10: OSS cache speed: 0.312798
Iter 1/10: ladvise speed: 0.400227
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.340615
Iter 2/10: OSS cache speed: 0.37208
Iter 2/10: ladvise speed: 0.418528
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.385225
Iter 3/10: OSS cache speed: 0.39327
Iter 3/10: ladvise speed: 0.394995
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.430529
Iter 4/10: OSS cache speed: 0.433688
Iter 4/10: ladvise speed: 0.384579
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.309503
Iter 5/10: OSS cache speed: 0.403458
Iter 5/10: ladvise speed: 0.348045
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.329085
Iter 6/10: OSS cache speed: 0.407179
Iter 6/10: ladvise speed: 0.358747
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.361563
Iter 7/10: OSS cache speed: 0.372708
Iter 7/10: ladvise speed: 0.393257
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.322013
Iter 8/10: OSS cache speed: 0.450089
Iter 8/10: ladvise speed: 0.387477
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.479266
Iter 9/10: OSS cache speed: 0.524953
Iter 9/10: ladvise speed: 0.483624
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.352743
Iter 10/10: OSS cache speed: 0.438237
Iter 10/10: ladvise speed: 0.393494
Average uncached read: .36
Average speedup with OSS cached read:  .41 = +13%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0