== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:36:16 (1786354576)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.92815 s, 17.7 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-ffff8bbd892dc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.91965
Iter 1/10: OSS cache speed: 2.05803
Iter 1/10: ladvise speed: 1.93353
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.95711
Iter 2/10: OSS cache speed: 1.98124
Iter 2/10: ladvise speed: 1.91952
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.97832
Iter 3/10: OSS cache speed: 2.07867
Iter 3/10: ladvise speed: 2.06765
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.03739
Iter 4/10: OSS cache speed: 2.00938
Iter 4/10: ladvise speed: 2.05629
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03224
Iter 5/10: OSS cache speed: 1.9857
Iter 5/10: ladvise speed: 2.05839
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.00526
Iter 6/10: OSS cache speed: 2.06631
Iter 6/10: ladvise speed: 2.03463
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.09928
Iter 7/10: OSS cache speed: 2.12815
Iter 7/10: ladvise speed: 2.0382
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.06544
Iter 8/10: OSS cache speed: 2.01597
Iter 8/10: ladvise speed: 1.90339
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.44673
Iter 9/10: OSS cache speed: 1.39225
Iter 9/10: ladvise speed: 2.02656
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.40879
Iter 10/10: OSS cache speed: 1.88546
Iter 10/10: ladvise speed: 1.73479
Average uncached read: 1.89
Average speedup with OSS cached read:  1.96 = +3%
Average speedup with ladvise willread:  1.97 = +4%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0