== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:11:28 (1780809088)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.46588 s, 19.2 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-ffff970702b65800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.2796
Iter 1/10: OSS cache speed: 1.9445
Iter 1/10: ladvise speed: 1.92491
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.96178
Iter 2/10: OSS cache speed: 1.93403
Iter 2/10: ladvise speed: 2.0384
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.00881
Iter 3/10: OSS cache speed: 1.91505
Iter 3/10: ladvise speed: 2.05887
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.06464
Iter 4/10: OSS cache speed: 2.01561
Iter 4/10: ladvise speed: 2.00553
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.91134
Iter 5/10: OSS cache speed: 2.0005
Iter 5/10: ladvise speed: 2.01693
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.97938
Iter 6/10: OSS cache speed: 2.04046
Iter 6/10: ladvise speed: 2.10163
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.00724
Iter 7/10: OSS cache speed: 2.02137
Iter 7/10: ladvise speed: 2.10609
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.09838
Iter 8/10: OSS cache speed: 2.0659
Iter 8/10: ladvise speed: 2.12893
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.03706
Iter 9/10: OSS cache speed: 1.99549
Iter 9/10: ladvise speed: 1.95866
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.02868
Iter 10/10: OSS cache speed: 2.03771
Iter 10/10: ladvise speed: 1.97838
Average uncached read: 2.03
Average speedup with OSS cached read:  1.99 = +-1%
Average speedup with ladvise willread:  2.03 = +0%
Speedup with OSS cached read less than 20%,  got -1%. Skipping ladvise willread check.
fail_loc=0