== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:28:22 (1746127702)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 6.78505 s, 15.5 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-ffff8800b639d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.699398
Iter 1/10: OSS cache speed: 0.756113
Iter 1/10: ladvise speed: 0.776667
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.643717
Iter 2/10: OSS cache speed: 0.800924
Iter 2/10: ladvise speed: 0.698522
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.528295
Iter 3/10: OSS cache speed: 0.644838
Iter 3/10: ladvise speed: 0.783646
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.715531
Iter 4/10: OSS cache speed: 0.770838
Iter 4/10: ladvise speed: 0.831445
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.727036
Iter 5/10: OSS cache speed: 0.719492
Iter 5/10: ladvise speed: 0.636443
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.552549
Iter 6/10: OSS cache speed: 0.616612
Iter 6/10: ladvise speed: 0.692892
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.557878
Iter 7/10: OSS cache speed: 0.79965
Iter 7/10: ladvise speed: 0.915921
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.834863
Iter 8/10: OSS cache speed: 0.867388
Iter 8/10: ladvise speed: 0.95389
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.924265
Iter 9/10: OSS cache speed: 0.983604
Iter 9/10: ladvise speed: 0.945269
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.802213
Iter 10/10: OSS cache speed: 0.884141
Iter 10/10: ladvise speed: 0.923692
Average uncached read: .69
Average speedup with OSS cached read:  .78 = +13%
Average speedup with ladvise willread:  .81 = +17%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0