== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:31:10 (1747211470)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.2263 s, 32.5 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-ffff8800b6332000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.28639
Iter 1/10: OSS cache speed: 1.63866
Iter 1/10: ladvise speed: 1.69889
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.44587
Iter 2/10: OSS cache speed: 1.00404
Iter 2/10: ladvise speed: 0.907062
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.853741
Iter 3/10: OSS cache speed: 0.794789
Iter 3/10: ladvise speed: 0.704485
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.660927
Iter 4/10: OSS cache speed: 0.669269
Iter 4/10: ladvise speed: 0.692845
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.590869
Iter 5/10: OSS cache speed: 0.745028
Iter 5/10: ladvise speed: 0.778458
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.701766
Iter 6/10: OSS cache speed: 0.737309
Iter 6/10: ladvise speed: 0.942464
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.826
Iter 7/10: OSS cache speed: 0.846385
Iter 7/10: ladvise speed: 0.893741
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.02485
Iter 8/10: OSS cache speed: 1.64194
Iter 8/10: ladvise speed: 1.89382
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.81146
Iter 9/10: OSS cache speed: 2.34703
Iter 9/10: ladvise speed: 2.12306
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.71692
Iter 10/10: OSS cache speed: 1.92826
Iter 10/10: ladvise speed: 2.11971
Average uncached read: 1.09
Average speedup with OSS cached read:  1.23 = +12%
Average speedup with ladvise willread:  1.27 = +16%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0