== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:38:01 (1787855881)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1121 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-ffff9dc8d9835000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.382547
Iter 1/10: OSS cache speed: 0.427323
Iter 1/10: ladvise speed: 0.443034
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.392836
Iter 2/10: OSS cache speed: 0.4519
Iter 2/10: ladvise speed: 0.379344
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.371739
Iter 3/10: OSS cache speed: 0.406716
Iter 3/10: ladvise speed: 0.372987
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.37528
Iter 4/10: OSS cache speed: 0.402855
Iter 4/10: ladvise speed: 0.411964
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.322854
Iter 5/10: OSS cache speed: 0.389324
Iter 5/10: ladvise speed: 0.359663
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.342942
Iter 6/10: OSS cache speed: 0.42683
Iter 6/10: ladvise speed: 0.387419
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.355569
Iter 7/10: OSS cache speed: 0.419907
Iter 7/10: ladvise speed: 0.419905
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.34555
Iter 8/10: OSS cache speed: 0.43171
Iter 8/10: ladvise speed: 0.370977
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370042
Iter 9/10: OSS cache speed: 0.385279
Iter 9/10: ladvise speed: 0.385857
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.338987
Iter 10/10: OSS cache speed: 0.365792
Iter 10/10: ladvise speed: 0.377852
Average uncached read: .35
Average speedup with OSS cached read:  .41 = +17%
Average speedup with ladvise willread:  .39 = +11%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0