== sanity test 255a: check 'lfs ladvise -a willread' ===== 08:07:54 (1743509274)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.30575 s, 45.5 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-ffff8800b6f15000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.36336
Iter 1/10: OSS cache speed: 2.46859
Iter 1/10: ladvise speed: 2.37298
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.35041
Iter 2/10: OSS cache speed: 2.35735
Iter 2/10: ladvise speed: 1.91423
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.17704
Iter 3/10: OSS cache speed: 2.68721
Iter 3/10: ladvise speed: 2.44539
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.13236
Iter 4/10: OSS cache speed: 2.58055
Iter 4/10: ladvise speed: 2.70239
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.62722
Iter 5/10: OSS cache speed: 2.6143
Iter 5/10: ladvise speed: 2.73275
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.58466
Iter 6/10: OSS cache speed: 2.44451
Iter 6/10: ladvise speed: 2.48646
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.34484
Iter 7/10: OSS cache speed: 2.6825
Iter 7/10: ladvise speed: 2.68086
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.57384
Iter 8/10: OSS cache speed: 2.43954
Iter 8/10: ladvise speed: 2.18185
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.51941
Iter 9/10: OSS cache speed: 2.12123
Iter 9/10: ladvise speed: 2.76362
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.75788
Iter 10/10: OSS cache speed: 2.75639
Iter 10/10: ladvise speed: 2.757
Average uncached read: 2.44
Average speedup with OSS cached read:  2.51 = +2%
Average speedup with ladvise willread:  2.50 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0