== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:43:49 (1731347029)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.97688 s, 26.4 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-ffff8800b5979800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.612
Iter 1/10: OSS cache speed: 2.92922
Iter 1/10: ladvise speed: 3.14476
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.94358
Iter 2/10: OSS cache speed: 3.09527
Iter 2/10: ladvise speed: 3.14954
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.92342
Iter 3/10: OSS cache speed: 3.11108
Iter 3/10: ladvise speed: 3.02566
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.8493
Iter 4/10: OSS cache speed: 3.00466
Iter 4/10: ladvise speed: 3.15471
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.69267
Iter 5/10: OSS cache speed: 2.84891
Iter 5/10: ladvise speed: 2.81066
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.2379
Iter 6/10: OSS cache speed: 2.39821
Iter 6/10: ladvise speed: 2.63936
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.64993
Iter 7/10: OSS cache speed: 3.25651
Iter 7/10: ladvise speed: 3.29656
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.42677
Iter 8/10: OSS cache speed: 3.22363
Iter 8/10: ladvise speed: 2.75735
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.45179
Iter 9/10: OSS cache speed: 2.72887
Iter 9/10: ladvise speed: 2.96209
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.78733
Iter 10/10: OSS cache speed: 2.49072
Iter 10/10: ladvise speed: 2.24176
Average uncached read: 2.65
Average speedup with OSS cached read: 2.90 = +9.43%
Average speedup with ladvise willread: 2.91 = +9.81%
Speedup with OSS cached read less than 20%, got 9.43%. Skipping ladvise willread check.
fail_loc=0