== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:10:01 (1759821001)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.83107 s, 18.0 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-ffff8977601ea000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.10347
Iter 1/10: OSS cache speed: 2.14464
Iter 1/10: ladvise speed: 2.12545
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.05987
Iter 2/10: OSS cache speed: 2.05103
Iter 2/10: ladvise speed: 2.07145
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.21448
Iter 3/10: OSS cache speed: 2.28601
Iter 3/10: ladvise speed: 2.20971
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.19251
Iter 4/10: OSS cache speed: 2.18484
Iter 4/10: ladvise speed: 2.10102
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.17965
Iter 5/10: OSS cache speed: 1.98763
Iter 5/10: ladvise speed: 1.94743
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.94255
Iter 6/10: OSS cache speed: 2.05256
Iter 6/10: ladvise speed: 1.87191
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.86141
Iter 7/10: OSS cache speed: 1.96764
Iter 7/10: ladvise speed: 1.60235
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.96011
Iter 8/10: OSS cache speed: 2.08262
Iter 8/10: ladvise speed: 1.48147
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.07502
Iter 9/10: OSS cache speed: 1.46417
Iter 9/10: ladvise speed: 1.67836
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.25083
Iter 10/10: OSS cache speed: 2.17273
Iter 10/10: ladvise speed: 1.49874
Average uncached read: 1.88
Average speedup with OSS cached read:  2.03 = +7%
Average speedup with ladvise willread:  1.85 = +-1%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0