== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:30:45 (1780525845)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.60635 s, 18.7 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-ffff8e2b50099800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.89177
Iter 1/10: OSS cache speed: 2.03142
Iter 1/10: ladvise speed: 1.62769
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.9099
Iter 2/10: OSS cache speed: 1.92797
Iter 2/10: ladvise speed: 2.14213
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.76736
Iter 3/10: OSS cache speed: 2.16924
Iter 3/10: ladvise speed: 2.1231
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.16098
Iter 4/10: OSS cache speed: 2.21879
Iter 4/10: ladvise speed: 2.22556
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.92369
Iter 5/10: OSS cache speed: 1.76465
Iter 5/10: ladvise speed: 1.27615
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.75786
Iter 6/10: OSS cache speed: 1.6159
Iter 6/10: ladvise speed: 1.24237
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.39098
Iter 7/10: OSS cache speed: 2.01223
Iter 7/10: ladvise speed: 1.79538
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.906058
Iter 8/10: OSS cache speed: 1.48455
Iter 8/10: ladvise speed: 2.10166
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.12436
Iter 9/10: OSS cache speed: 2.33929
Iter 9/10: ladvise speed: 2.05987
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.10693
Iter 10/10: OSS cache speed: 1.92013
Iter 10/10: ladvise speed: 1.86654
Average uncached read: 1.79
Average speedup with OSS cached read:  1.94 = +8%
Average speedup with ladvise willread:  1.84 = +2%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0