== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:09:17 (1726304957)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.62649 s, 39.9 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-ffff8800b61e2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.85056
Iter 1/10: OSS cache speed: 3.13916
Iter 1/10: ladvise speed: 3.10727
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.96795
Iter 2/10: OSS cache speed: 3.11494
Iter 2/10: ladvise speed: 3.15625
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.86066
Iter 3/10: OSS cache speed: 3.21842
Iter 3/10: ladvise speed: 3.22839
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.01849
Iter 4/10: OSS cache speed: 3.26715
Iter 4/10: ladvise speed: 3.18961
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.92852
Iter 5/10: OSS cache speed: 3.21237
Iter 5/10: ladvise speed: 3.22121
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.91506
Iter 6/10: OSS cache speed: 3.25695
Iter 6/10: ladvise speed: 3.29902
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 3.0033
Iter 7/10: OSS cache speed: 3.25167
Iter 7/10: ladvise speed: 3.28265
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.67838
Iter 8/10: OSS cache speed: 3.06143
Iter 8/10: ladvise speed: 3.18682
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.37722
Iter 9/10: OSS cache speed: 2.85655
Iter 9/10: ladvise speed: 2.44908
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.77728
Iter 10/10: OSS cache speed: 2.72035
Iter 10/10: ladvise speed: 2.65623
Average uncached read: 2.83
Average speedup with OSS cached read: 3.10 = +9.54%
Average speedup with ladvise willread: 3.07 = +8.48%
Speedup with OSS cached read less than 20%, got 9.54%. Skipping ladvise willread check.
fail_loc=0