== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:26:30 (1787192790)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.1109 s, 8.7 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-ffff9ce4e0584000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.386277
Iter 1/10: OSS cache speed: 0.40494
Iter 1/10: ladvise speed: 0.387564
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.419567
Iter 2/10: OSS cache speed: 0.499854
Iter 2/10: ladvise speed: 0.306892
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.377083
Iter 3/10: OSS cache speed: 0.370649
Iter 3/10: ladvise speed: 0.451397
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.394935
Iter 4/10: OSS cache speed: 0.407862
Iter 4/10: ladvise speed: 0.48139
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.457346
Iter 5/10: OSS cache speed: 0.611781
Iter 5/10: ladvise speed: 0.417501
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.474009
Iter 6/10: OSS cache speed: 0.525927
Iter 6/10: ladvise speed: 0.606577
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.607041
Iter 7/10: OSS cache speed: 0.573986
Iter 7/10: ladvise speed: 0.602271
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.569166
Iter 8/10: OSS cache speed: 0.622877
Iter 8/10: ladvise speed: 0.543816
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.480834
Iter 9/10: OSS cache speed: 0.446354
Iter 9/10: ladvise speed: 0.585327
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.416446
Iter 10/10: OSS cache speed: 0.527958
Iter 10/10: ladvise speed: 0.450276
Average uncached read: .45
Average speedup with OSS cached read:  .49 = +8%
Average speedup with ladvise willread:  .48 = +6%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0