== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:14:42 (1783646082)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.68524 s, 15.7 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-ffff8eca42e7f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.369128
Iter 1/10: OSS cache speed: 0.195378
Iter 1/10: ladvise speed: 0.358607
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.328124
Iter 2/10: OSS cache speed: 0.322495
Iter 2/10: ladvise speed: 0.313796
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.331638
Iter 3/10: OSS cache speed: 0.274907
Iter 3/10: ladvise speed: 0.204235
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.352245
Iter 4/10: OSS cache speed: 0.395001
Iter 4/10: ladvise speed: 0.411319
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.40675
Iter 5/10: OSS cache speed: 0.417282
Iter 5/10: ladvise speed: 0.489492
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.598617
Iter 6/10: OSS cache speed: 0.68718
Iter 6/10: ladvise speed: 0.659669
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.31043
Iter 7/10: OSS cache speed: 1.87092
Iter 7/10: ladvise speed: 2.02247
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.75726
Iter 8/10: OSS cache speed: 1.14536
Iter 8/10: ladvise speed: 1.1445
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.969854
Iter 9/10: OSS cache speed: 0.912878
Iter 9/10: ladvise speed: 0.968845
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.894143
Iter 10/10: OSS cache speed: 1.05354
Iter 10/10: ladvise speed: 0.971078
Average uncached read: .73
Average speedup with OSS cached read:  .72 = +-1%
Average speedup with ladvise willread:  .75 = +2%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0