== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:20:58 (1768548058)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9888 s, 8.1 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-ffff9a6dc350b000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.337103
Iter 1/10: OSS cache speed: 0.364115
Iter 1/10: ladvise speed: 0.342168
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.387549
Iter 2/10: OSS cache speed: 0.414944
Iter 2/10: ladvise speed: 0.402713
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.426868
Iter 3/10: OSS cache speed: 0.446298
Iter 3/10: ladvise speed: 0.445384
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.415584
Iter 4/10: OSS cache speed: 0.421647
Iter 4/10: ladvise speed: 0.462703
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.46931
Iter 5/10: OSS cache speed: 0.464332
Iter 5/10: ladvise speed: 0.567281
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.503732
Iter 6/10: OSS cache speed: 0.482926
Iter 6/10: ladvise speed: 0.501273
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.446857
Iter 7/10: OSS cache speed: 0.43116
Iter 7/10: ladvise speed: 0.420413
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.415183
Iter 8/10: OSS cache speed: 0.408079
Iter 8/10: ladvise speed: 0.391172
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.457842
Iter 9/10: OSS cache speed: 0.466183
Iter 9/10: ladvise speed: 0.462864
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.408025
Iter 10/10: OSS cache speed: 0.453357
Iter 10/10: ladvise speed: 0.482348
Average uncached read: .42
Average speedup with OSS cached read:  .43 = +2%
Average speedup with ladvise willread:  .44 = +4%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0