== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:25:16 (1787750716)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2023 s, 7.4 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-ffff8f69033ad000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.291739
Iter 1/10: OSS cache speed: 0.323114
Iter 1/10: ladvise speed: 0.31721
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.32913
Iter 2/10: OSS cache speed: 0.290046
Iter 2/10: ladvise speed: 0.362534
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.331841
Iter 3/10: OSS cache speed: 0.352865
Iter 3/10: ladvise speed: 0.289631
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.273378
Iter 4/10: OSS cache speed: 0.327828
Iter 4/10: ladvise speed: 0.310182
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.282268
Iter 5/10: OSS cache speed: 0.351148
Iter 5/10: ladvise speed: 0.369942
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.307396
Iter 6/10: OSS cache speed: 0.259474
Iter 6/10: ladvise speed: 0.297154
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.274335
Iter 7/10: OSS cache speed: 0.28103
Iter 7/10: ladvise speed: 0.303301
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.283878
Iter 8/10: OSS cache speed: 0.366339
Iter 8/10: ladvise speed: 0.328888
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.36529
Iter 9/10: OSS cache speed: 0.378643
Iter 9/10: ladvise speed: 0.404313
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.358194
Iter 10/10: OSS cache speed: 0.339001
Iter 10/10: ladvise speed: 0.362143
Average uncached read: .30
Average speedup with OSS cached read:  .32 = +6%
Average speedup with ladvise willread:  .33 = +10%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0