== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:28:26 (1786465706)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.87101 s, 13.3 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-ffff99accccf4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.640741
Iter 1/10: OSS cache speed: 0.503316
Iter 1/10: ladvise speed: 0.508567
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.469368
Iter 2/10: OSS cache speed: 0.551564
Iter 2/10: ladvise speed: 0.520839
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.469427
Iter 3/10: OSS cache speed: 0.551235
Iter 3/10: ladvise speed: 0.57527
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.523457
Iter 4/10: OSS cache speed: 0.597727
Iter 4/10: ladvise speed: 0.616064
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.52853
Iter 5/10: OSS cache speed: 0.610775
Iter 5/10: ladvise speed: 0.620363
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.548503
Iter 6/10: OSS cache speed: 0.634995
Iter 6/10: ladvise speed: 0.690422
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.650418
Iter 7/10: OSS cache speed: 0.724469
Iter 7/10: ladvise speed: 0.748657
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.637486
Iter 8/10: OSS cache speed: 0.827059
Iter 8/10: ladvise speed: 0.876723
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.837166
Iter 9/10: OSS cache speed: 0.919527
Iter 9/10: ladvise speed: 1.07808
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.953284
Iter 10/10: OSS cache speed: 1.10572
Iter 10/10: ladvise speed: 1.31659
Average uncached read: .62
Average speedup with OSS cached read:  .70 = +12%
Average speedup with ladvise willread:  .75 = +20%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0