== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:41:14 (1788846074)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.4805 s, 9.1 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-ffff9270d1efa800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.408293
Iter 1/10: OSS cache speed: 0.418386
Iter 1/10: ladvise speed: 0.41848
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.40669
Iter 2/10: OSS cache speed: 0.45039
Iter 2/10: ladvise speed: 0.459666
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.394528
Iter 3/10: OSS cache speed: 0.439202
Iter 3/10: ladvise speed: 0.411707
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.426365
Iter 4/10: OSS cache speed: 0.463038
Iter 4/10: ladvise speed: 0.451639
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.411292
Iter 5/10: OSS cache speed: 0.46733
Iter 5/10: ladvise speed: 0.450164
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.35733
Iter 6/10: OSS cache speed: 0.445604
Iter 6/10: ladvise speed: 0.47242
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.394243
Iter 7/10: OSS cache speed: 0.408942
Iter 7/10: ladvise speed: 0.416564
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.372159
Iter 8/10: OSS cache speed: 0.439528
Iter 8/10: ladvise speed: 0.428602
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.324647
Iter 9/10: OSS cache speed: 0.359801
Iter 9/10: ladvise speed: 0.347432
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.356856
Iter 10/10: OSS cache speed: 0.347817
Iter 10/10: ladvise speed: 0.361858
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .42 = +10%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0