== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:27:06 (1782221226)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.0372 s, 8.0 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-ffff8c73127e5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.4046
Iter 1/10: OSS cache speed: 0.379828
Iter 1/10: ladvise speed: 0.419976
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.359883
Iter 2/10: OSS cache speed: 0.430045
Iter 2/10: ladvise speed: 0.459971
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.411633
Iter 3/10: OSS cache speed: 0.422484
Iter 3/10: ladvise speed: 0.430074
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.406398
Iter 4/10: OSS cache speed: 0.437872
Iter 4/10: ladvise speed: 0.358063
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.386774
Iter 5/10: OSS cache speed: 0.433228
Iter 5/10: ladvise speed: 0.379797
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.356964
Iter 6/10: OSS cache speed: 0.369453
Iter 6/10: ladvise speed: 0.371633
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.400347
Iter 7/10: OSS cache speed: 0.46239
Iter 7/10: ladvise speed: 0.398291
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.374155
Iter 8/10: OSS cache speed: 0.461659
Iter 8/10: ladvise speed: 0.437155
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357658
Iter 9/10: OSS cache speed: 0.439474
Iter 9/10: ladvise speed: 0.452477
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.367522
Iter 10/10: OSS cache speed: 0.376966
Iter 10/10: ladvise speed: 0.408079
Average uncached read: .38
Average speedup with OSS cached read:  .42 = +10%
Average speedup with ladvise willread:  .41 = +7%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0