== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:52:09 (1786038729)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7934 s, 7.6 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-ffff9001c5911000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.370474
Iter 1/10: OSS cache speed: 0.316737
Iter 1/10: ladvise speed: 0.373265
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.326627
Iter 2/10: OSS cache speed: 0.396282
Iter 2/10: ladvise speed: 0.336821
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.352756
Iter 3/10: OSS cache speed: 0.362449
Iter 3/10: ladvise speed: 0.391559
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.320681
Iter 4/10: OSS cache speed: 0.44199
Iter 4/10: ladvise speed: 0.35327
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.290556
Iter 5/10: OSS cache speed: 0.395547
Iter 5/10: ladvise speed: 0.349538
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.355611
Iter 6/10: OSS cache speed: 0.349563
Iter 6/10: ladvise speed: 0.422113
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.365154
Iter 7/10: OSS cache speed: 0.374707
Iter 7/10: ladvise speed: 0.32976
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.315693
Iter 8/10: OSS cache speed: 0.355387
Iter 8/10: ladvise speed: 0.415716
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.372324
Iter 9/10: OSS cache speed: 0.347505
Iter 9/10: ladvise speed: 0.443326
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.411043
Iter 10/10: OSS cache speed: 0.401756
Iter 10/10: ladvise speed: 0.435015
Average uncached read: .34
Average speedup with OSS cached read:  .37 = +8%
Average speedup with ladvise willread:  .38 = +11%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0