== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:32:45 (1781029965)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.92795 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-ffff8b65858e8000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.794421
Iter 1/10: OSS cache speed: 0.805533
Iter 1/10: ladvise speed: 0.968546
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.87236
Iter 2/10: OSS cache speed: 0.887059
Iter 2/10: ladvise speed: 0.989008
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.13677
Iter 3/10: OSS cache speed: 1.14521
Iter 3/10: ladvise speed: 1.03314
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.03187
Iter 4/10: OSS cache speed: 0.878731
Iter 4/10: ladvise speed: 0.826204
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.935896
Iter 5/10: OSS cache speed: 0.869291
Iter 5/10: ladvise speed: 1.13422
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.963694
Iter 6/10: OSS cache speed: 1.11938
Iter 6/10: ladvise speed: 1.51584
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.58029
Iter 7/10: OSS cache speed: 1.80035
Iter 7/10: ladvise speed: 1.85399
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.86557
Iter 8/10: OSS cache speed: 1.95786
Iter 8/10: ladvise speed: 1.92979
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.96109
Iter 9/10: OSS cache speed: 1.92109
Iter 9/10: ladvise speed: 1.55753
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.91777
Iter 10/10: OSS cache speed: 1.8766
Iter 10/10: ladvise speed: 1.98918
Average uncached read: 1.30
Average speedup with OSS cached read:  1.32 = +1%
Average speedup with ladvise willread:  1.37 = +5%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0