== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:54:34 (1781664874)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.61638 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-ffff99adc71d3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.76829
Iter 1/10: OSS cache speed: 1.44183
Iter 1/10: ladvise speed: 1.27558
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.79549
Iter 2/10: OSS cache speed: 2.0804
Iter 2/10: ladvise speed: 1.84942
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.01913
Iter 3/10: OSS cache speed: 2.18932
Iter 3/10: ladvise speed: 1.04782
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27857
Iter 4/10: OSS cache speed: 2.03689
Iter 4/10: ladvise speed: 1.76641
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.9644
Iter 5/10: OSS cache speed: 1.91402
Iter 5/10: ladvise speed: 2.04159
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.23463
Iter 6/10: OSS cache speed: 1.40138
Iter 6/10: ladvise speed: 0.200993
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.339512
Iter 7/10: OSS cache speed: 0.378152
Iter 7/10: ladvise speed: 0.365039
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.304266
Iter 8/10: OSS cache speed: 0.295146
Iter 8/10: ladvise speed: 0.38063
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.536065
Iter 9/10: OSS cache speed: 0.542399
Iter 9/10: ladvise speed: 0.552506
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.62684
Iter 10/10: OSS cache speed: 0.542263
Iter 10/10: ladvise speed: 1.44755
Average uncached read: 1.38
Average speedup with OSS cached read:  1.28 = +-7%
Average speedup with ladvise willread:  1.09 = +-21%
Speedup with OSS cached read less than 20%,  got -7%. Skipping ladvise willread check.
fail_loc=0