== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:50:18 (1749541818)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.64418 s, 39.7 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-ffff8800b5b28000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.9281
Iter 1/10: OSS cache speed: 3.28192
Iter 1/10: ladvise speed: 3.16273
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.82495
Iter 2/10: OSS cache speed: 3.18353
Iter 2/10: ladvise speed: 3.14521
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.87467
Iter 3/10: OSS cache speed: 3.29215
Iter 3/10: ladvise speed: 3.30512
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.05083
Iter 4/10: OSS cache speed: 3.09079
Iter 4/10: ladvise speed: 3.35542
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.06401
Iter 5/10: OSS cache speed: 3.37778
Iter 5/10: ladvise speed: 2.95027
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.20212
Iter 6/10: OSS cache speed: 2.75672
Iter 6/10: ladvise speed: 3.11646
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.80462
Iter 7/10: OSS cache speed: 3.24554
Iter 7/10: ladvise speed: 2.95623
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.99827
Iter 8/10: OSS cache speed: 3.03887
Iter 8/10: ladvise speed: 2.98176
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.85564
Iter 9/10: OSS cache speed: 2.2699
Iter 9/10: ladvise speed: 2.96941
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.54427
Iter 10/10: OSS cache speed: 3.21144
Iter 10/10: ladvise speed: 3.14154
Average uncached read: 2.71
Average speedup with OSS cached read:  3.07 = +13%
Average speedup with ladvise willread:  3.10 = +14%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0