== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:59:53 (1788645593)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.8324 s, 7.6 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-ffff915684e19800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.299469
Iter 1/10: OSS cache speed: 0.339743
Iter 1/10: ladvise speed: 0.33913
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.313881
Iter 2/10: OSS cache speed: 0.3669
Iter 2/10: ladvise speed: 0.388769
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.300974
Iter 3/10: OSS cache speed: 0.371596
Iter 3/10: ladvise speed: 0.377797
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.308495
Iter 4/10: OSS cache speed: 0.369246
Iter 4/10: ladvise speed: 0.38927
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.344259
Iter 5/10: OSS cache speed: 0.399308
Iter 5/10: ladvise speed: 0.39523
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388292
Iter 6/10: OSS cache speed: 0.387411
Iter 6/10: ladvise speed: 0.370791
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.378697
Iter 7/10: OSS cache speed: 0.435599
Iter 7/10: ladvise speed: 0.43247
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.358626
Iter 8/10: OSS cache speed: 0.445249
Iter 8/10: ladvise speed: 0.350774
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365282
Iter 9/10: OSS cache speed: 0.41316
Iter 9/10: ladvise speed: 0.409998
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.377507
Iter 10/10: OSS cache speed: 0.423944
Iter 10/10: ladvise speed: 0.421701
Average uncached read: .34
Average speedup with OSS cached read:  .39 = +14%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0