== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:58:43 (1776923923)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.5383 s, 6.3 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-ffff9254c7e5f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.206194
Iter 1/10: OSS cache speed: 0.23961
Iter 1/10: ladvise speed: 0.208097
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.199772
Iter 2/10: OSS cache speed: 0.223135
Iter 2/10: ladvise speed: 0.222804
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.167625
Iter 3/10: OSS cache speed: 0.215081
Iter 3/10: ladvise speed: 0.245617
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.233036
Iter 4/10: OSS cache speed: 0.267943
Iter 4/10: ladvise speed: 0.282399
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.230621
Iter 5/10: OSS cache speed: 0.238103
Iter 5/10: ladvise speed: 0.27365
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.239385
Iter 6/10: OSS cache speed: 0.250554
Iter 6/10: ladvise speed: 0.240344
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.222043
Iter 7/10: OSS cache speed: 0.267793
Iter 7/10: ladvise speed: 0.299909
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.264974
Iter 8/10: OSS cache speed: 0.303132
Iter 8/10: ladvise speed: 0.326785
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.22726
Iter 9/10: OSS cache speed: 0.277544
Iter 9/10: ladvise speed: 0.28248
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.245967
Iter 10/10: OSS cache speed: 0.262118
Iter 10/10: ladvise speed: 0.291257
Average uncached read: .22
Average speedup with OSS cached read:  .25 = +13%
Average speedup with ladvise willread:  .26 = +18%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0