== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:12:13 (1780809133)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.07398 s, 20.7 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-ffff9baa47e81800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.01759
Iter 1/10: OSS cache speed: 2.00596
Iter 1/10: ladvise speed: 1.97509
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.01355
Iter 2/10: OSS cache speed: 2.12845
Iter 2/10: ladvise speed: 2.14001
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.01129
Iter 3/10: OSS cache speed: 2.03973
Iter 3/10: ladvise speed: 2.0909
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.04631
Iter 4/10: OSS cache speed: 2.08016
Iter 4/10: ladvise speed: 2.03321
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.99848
Iter 5/10: OSS cache speed: 2.09643
Iter 5/10: ladvise speed: 2.06761
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.02242
Iter 6/10: OSS cache speed: 2.12132
Iter 6/10: ladvise speed: 2.15384
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.18246
Iter 7/10: OSS cache speed: 2.19302
Iter 7/10: ladvise speed: 2.186
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.19083
Iter 8/10: OSS cache speed: 2.21865
Iter 8/10: ladvise speed: 2.20895
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.04694
Iter 9/10: OSS cache speed: 2.05015
Iter 9/10: ladvise speed: 2.02509
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.09096
Iter 10/10: OSS cache speed: 2.05241
Iter 10/10: ladvise speed: 2.06
Average uncached read: 2.06
Average speedup with OSS cached read:  2.09 = +1%
Average speedup with ladvise willread:  2.09 = +1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0