== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:18:51 (1746137931)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 3.3804 s, 31.0 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-ffff8800a9f0e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.971096
Iter 1/10: OSS cache speed: 1.02547
Iter 1/10: ladvise speed: 1.25656
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.981795
Iter 2/10: OSS cache speed: 1.29415
Iter 2/10: ladvise speed: 1.02533
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.995141
Iter 3/10: OSS cache speed: 1.14636
Iter 3/10: ladvise speed: 1.12008
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.913028
Iter 4/10: OSS cache speed: 1.10874
Iter 4/10: ladvise speed: 0.968897
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.857891
Iter 5/10: OSS cache speed: 0.966776
Iter 5/10: ladvise speed: 0.909281
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.784736
Iter 6/10: OSS cache speed: 0.886742
Iter 6/10: ladvise speed: 0.953403
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.830417
Iter 7/10: OSS cache speed: 0.925608
Iter 7/10: ladvise speed: 0.920412
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.756045
Iter 8/10: OSS cache speed: 0.894249
Iter 8/10: ladvise speed: 0.942626
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.881554
Iter 9/10: OSS cache speed: 0.88775
Iter 9/10: ladvise speed: 0.821085
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.877142
Iter 10/10: OSS cache speed: 0.951924
Iter 10/10: ladvise speed: 0.866232
Average uncached read: .88
Average speedup with OSS cached read:  1.00 = +13%
Average speedup with ladvise willread:  .97 = +10%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0