== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:05:51 (1787576751)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 19.5049 s, 5.4 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-ffff9fa2ca051000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.362703
Iter 1/10: OSS cache speed: 0.50218
Iter 1/10: ladvise speed: 0.40977
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.440731
Iter 2/10: OSS cache speed: 0.474892
Iter 2/10: ladvise speed: 0.427255
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.436617
Iter 3/10: OSS cache speed: 0.369868
Iter 3/10: ladvise speed: 0.415218
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.396898
Iter 4/10: OSS cache speed: 0.34042
Iter 4/10: ladvise speed: 0.438
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.404418
Iter 5/10: OSS cache speed: 0.456807
Iter 5/10: ladvise speed: 0.337544
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.388873
Iter 6/10: OSS cache speed: 0.383801
Iter 6/10: ladvise speed: 0.439633
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.349979
Iter 7/10: OSS cache speed: 0.360606
Iter 7/10: ladvise speed: 0.302915
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.292318
Iter 8/10: OSS cache speed: 0.359059
Iter 8/10: ladvise speed: 0.480181
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.316382
Iter 9/10: OSS cache speed: 0.391425
Iter 9/10: ladvise speed: 0.339381
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.368026
Iter 10/10: OSS cache speed: 0.29694
Iter 10/10: ladvise speed: 0.392613
Average uncached read: .37
Average speedup with OSS cached read:  .39 = +5%
Average speedup with ladvise willread:  .39 = +5%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0