== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:12:19 (1786403539)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9763 s, 7.5 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-ffff92d6c60fe800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.33904
Iter 1/10: OSS cache speed: 0.380772
Iter 1/10: ladvise speed: 0.378336
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.384872
Iter 2/10: OSS cache speed: 0.395117
Iter 2/10: ladvise speed: 0.406623
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.387762
Iter 3/10: OSS cache speed: 0.378338
Iter 3/10: ladvise speed: 0.384537
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.403915
Iter 4/10: OSS cache speed: 0.406697
Iter 4/10: ladvise speed: 0.382207
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.372029
Iter 5/10: OSS cache speed: 0.421481
Iter 5/10: ladvise speed: 0.38703
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.406394
Iter 6/10: OSS cache speed: 0.392975
Iter 6/10: ladvise speed: 0.378505
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.40267
Iter 7/10: OSS cache speed: 0.40824
Iter 7/10: ladvise speed: 0.391951
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.365
Iter 8/10: OSS cache speed: 0.379266
Iter 8/10: ladvise speed: 0.404349
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.38691
Iter 9/10: OSS cache speed: 0.377478
Iter 9/10: ladvise speed: 0.38484
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.372712
Iter 10/10: OSS cache speed: 0.391801
Iter 10/10: ladvise speed: 0.367544
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .38 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0