== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:07:21 (1748470041)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.06781 s, 50.7 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-ffff8800b6076800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.49671
Iter 1/10: OSS cache speed: 1.52618
Iter 1/10: ladvise speed: 2.21154
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.55957
Iter 2/10: OSS cache speed: 1.9201
Iter 2/10: ladvise speed: 2.70291
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.61979
Iter 3/10: OSS cache speed: 1.39157
Iter 3/10: ladvise speed: 2.5313
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.78765
Iter 4/10: OSS cache speed: 2.82956
Iter 4/10: ladvise speed: 2.61584
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.712845
Iter 5/10: OSS cache speed: 0.737429
Iter 5/10: ladvise speed: 1.20803
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.26954
Iter 6/10: OSS cache speed: 2.48943
Iter 6/10: ladvise speed: 2.45483
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.66737
Iter 7/10: OSS cache speed: 2.58729
Iter 7/10: ladvise speed: 1.8132
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.45877
Iter 8/10: OSS cache speed: 1.75539
Iter 8/10: ladvise speed: 2.2753
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.64742
Iter 9/10: OSS cache speed: 2.55939
Iter 9/10: ladvise speed: 2.54198
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.52442
Iter 10/10: OSS cache speed: 2.68092
Iter 10/10: ladvise speed: 2.76561
Average uncached read: 2.17
Average speedup with OSS cached read:  2.04 = +-5%
Average speedup with ladvise willread:  2.31 = +6%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0