== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:29:03 (1789604943)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.8389 s, 8.9 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-ffff9019078f5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.33986
Iter 1/10: OSS cache speed: 0.354327
Iter 1/10: ladvise speed: 0.335072
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.287221
Iter 2/10: OSS cache speed: 0.328678
Iter 2/10: ladvise speed: 0.282358
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.319422
Iter 3/10: OSS cache speed: 0.356078
Iter 3/10: ladvise speed: 0.288579
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.323072
Iter 4/10: OSS cache speed: 0.320486
Iter 4/10: ladvise speed: 0.314545
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.340678
Iter 5/10: OSS cache speed: 0.351633
Iter 5/10: ladvise speed: 0.341982
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.365345
Iter 6/10: OSS cache speed: 0.311078
Iter 6/10: ladvise speed: 0.319611
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.355619
Iter 7/10: OSS cache speed: 0.364862
Iter 7/10: ladvise speed: 0.351136
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.381278
Iter 8/10: OSS cache speed: 0.287571
Iter 8/10: ladvise speed: 0.349671
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.333654
Iter 9/10: OSS cache speed: 0.330364
Iter 9/10: ladvise speed: 0.322653
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.309437
Iter 10/10: OSS cache speed: 0.327065
Iter 10/10: ladvise speed: 0.354916
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .32 = +-3%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0