== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:59:47 (1746140387)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.81563 s, 21.8 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-ffff8800b6cad800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.639038
Iter 1/10: OSS cache speed: 0.675038
Iter 1/10: ladvise speed: 0.768196
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.669929
Iter 2/10: OSS cache speed: 0.791096
Iter 2/10: ladvise speed: 0.812066
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.663363
Iter 3/10: OSS cache speed: 0.747057
Iter 3/10: ladvise speed: 0.751879
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.642202
Iter 4/10: OSS cache speed: 0.750117
Iter 4/10: ladvise speed: 0.674286
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.765884
Iter 5/10: OSS cache speed: 0.901207
Iter 5/10: ladvise speed: 0.877699
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.75218
Iter 6/10: OSS cache speed: 0.983204
Iter 6/10: ladvise speed: 1.067
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.917877
Iter 7/10: OSS cache speed: 0.884694
Iter 7/10: ladvise speed: 0.763255
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.809403
Iter 8/10: OSS cache speed: 0.858469
Iter 8/10: ladvise speed: 0.99121
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.916215
Iter 9/10: OSS cache speed: 1.036
Iter 9/10: ladvise speed: 0.840248
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.665869
Iter 10/10: OSS cache speed: 0.879863
Iter 10/10: ladvise speed: 0.915966
Average uncached read: .74
Average speedup with OSS cached read:  .85 = +14%
Average speedup with ladvise willread:  .84 = +13%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0