== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:52:31 (1790772751)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.009 s, 8.7 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-ffff9120c5bda000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369552
Iter 1/10: OSS cache speed: 0.474956
Iter 1/10: ladvise speed: 0.445403
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.389594
Iter 2/10: OSS cache speed: 0.451702
Iter 2/10: ladvise speed: 0.440785
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.441953
Iter 3/10: OSS cache speed: 0.542728
Iter 3/10: ladvise speed: 0.508227
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.473076
Iter 4/10: OSS cache speed: 0.511161
Iter 4/10: ladvise speed: 0.466775
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.487689
Iter 5/10: OSS cache speed: 0.528756
Iter 5/10: ladvise speed: 0.482164
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.475944
Iter 6/10: OSS cache speed: 0.49686
Iter 6/10: ladvise speed: 0.537531
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.446268
Iter 7/10: OSS cache speed: 0.480955
Iter 7/10: ladvise speed: 0.471855
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.41539
Iter 8/10: OSS cache speed: 0.393292
Iter 8/10: ladvise speed: 0.450419
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.345314
Iter 9/10: OSS cache speed: 0.47855
Iter 9/10: ladvise speed: 0.375191
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.421439
Iter 10/10: OSS cache speed: 0.435033
Iter 10/10: ladvise speed: 0.40813
Average uncached read: .42
Average speedup with OSS cached read:  .47 = +11%
Average speedup with ladvise willread:  .45 = +7%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0