== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:54:35 (1789023275)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8645 s, 8.2 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-ffff9621151a5000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.543978
Iter 1/10: OSS cache speed: 0.530249
Iter 1/10: ladvise speed: 0.501133
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.346088
Iter 2/10: OSS cache speed: 0.453166
Iter 2/10: ladvise speed: 0.418765
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.469539
Iter 3/10: OSS cache speed: 0.470045
Iter 3/10: ladvise speed: 0.47807
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.536437
Iter 4/10: OSS cache speed: 0.482388
Iter 4/10: ladvise speed: 0.562478
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.382765
Iter 5/10: OSS cache speed: 0.429207
Iter 5/10: ladvise speed: 0.429537
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.396482
Iter 6/10: OSS cache speed: 0.369622
Iter 6/10: ladvise speed: 0.431077
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.416724
Iter 7/10: OSS cache speed: 0.442626
Iter 7/10: ladvise speed: 0.477329
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.475856
Iter 8/10: OSS cache speed: 0.474566
Iter 8/10: ladvise speed: 0.453527
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.498674
Iter 9/10: OSS cache speed: 0.555291
Iter 9/10: ladvise speed: 0.44403
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.38246
Iter 10/10: OSS cache speed: 0.515762
Iter 10/10: ladvise speed: 0.394149
Average uncached read: .44
Average speedup with OSS cached read:  .47 = +6%
Average speedup with ladvise willread:  .45 = +2%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0