== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:55:18 (1788562518)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.8758 s, 6.6 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-ffff9b8c18474800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.296247
Iter 1/10: OSS cache speed: 0.374426
Iter 1/10: ladvise speed: 0.456215
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.390001
Iter 2/10: OSS cache speed: 0.328386
Iter 2/10: ladvise speed: 0.465886
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.383738
Iter 3/10: OSS cache speed: 0.344263
Iter 3/10: ladvise speed: 0.354175
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.433992
Iter 4/10: OSS cache speed: 0.320637
Iter 4/10: ladvise speed: 0.443161
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.281549
Iter 5/10: OSS cache speed: 0.424151
Iter 5/10: ladvise speed: 0.437758
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.428116
Iter 6/10: OSS cache speed: 0.304797
Iter 6/10: ladvise speed: 0.332895
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.344563
Iter 7/10: OSS cache speed: 0.349835
Iter 7/10: ladvise speed: 0.417832
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433313
Iter 8/10: OSS cache speed: 0.445895
Iter 8/10: ladvise speed: 0.492134
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.427399
Iter 9/10: OSS cache speed: 0.527347
Iter 9/10: ladvise speed: 0.554076
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342641
Iter 10/10: OSS cache speed: 0.341358
Iter 10/10: ladvise speed: 0.342108
Average uncached read: .37
Average speedup with OSS cached read:  .37 = +0%
Average speedup with ladvise willread:  .42 = +13%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0