== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:23:24 (1788845004)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.1455 s, 6.9 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-ffff8e19d37ac000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.323278
Iter 1/10: OSS cache speed: 0.334568
Iter 1/10: ladvise speed: 0.36809
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352452
Iter 2/10: OSS cache speed: 0.371901
Iter 2/10: ladvise speed: 0.396843
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.334654
Iter 3/10: OSS cache speed: 0.417954
Iter 3/10: ladvise speed: 0.356944
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.328653
Iter 4/10: OSS cache speed: 0.33133
Iter 4/10: ladvise speed: 0.340039
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.31999
Iter 5/10: OSS cache speed: 0.349817
Iter 5/10: ladvise speed: 0.338353
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.32176
Iter 6/10: OSS cache speed: 0.403262
Iter 6/10: ladvise speed: 0.311868
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.324939
Iter 7/10: OSS cache speed: 0.355284
Iter 7/10: ladvise speed: 0.404342
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.312596
Iter 8/10: OSS cache speed: 0.328236
Iter 8/10: ladvise speed: 0.333519
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.30034
Iter 9/10: OSS cache speed: 0.390336
Iter 9/10: ladvise speed: 0.329053
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.322497
Iter 10/10: OSS cache speed: 0.350349
Iter 10/10: ladvise speed: 0.312956
Average uncached read: .32
Average speedup with OSS cached read:  .36 = +12%
Average speedup with ladvise willread:  .34 = +6%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0