== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:52:37 (1721879557)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.88978 s, 36.3 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-ffff88012aa0f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.93456
Iter 1/10: OSS cache speed: 2.51023
Iter 1/10: ladvise speed: 2.43961
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.84963
Iter 2/10: OSS cache speed: 2.43622
Iter 2/10: ladvise speed: 2.22738
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.47963
Iter 3/10: OSS cache speed: 3.32826
Iter 3/10: ladvise speed: 3.36297
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.82639
Iter 4/10: OSS cache speed: 2.98243
Iter 4/10: ladvise speed: 3.35682
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 3.07857
Iter 5/10: OSS cache speed: 3.24596
Iter 5/10: ladvise speed: 3.24838
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.86862
Iter 6/10: OSS cache speed: 3.25825
Iter 6/10: ladvise speed: 2.84058
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.71815
Iter 7/10: OSS cache speed: 2.89084
Iter 7/10: ladvise speed: 2.80427
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.28172
Iter 8/10: OSS cache speed: 2.70553
Iter 8/10: ladvise speed: 3.14674
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.82717
Iter 9/10: OSS cache speed: 3.13471
Iter 9/10: ladvise speed: 2.99252
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.57638
Iter 10/10: OSS cache speed: 2.11539
Iter 10/10: ladvise speed: 2.95189
Average uncached read: 2.64
Average speedup with OSS cached read: 2.86 = +8.33%
Average speedup with ladvise willread: 2.93 = +10.98%
Speedup with OSS cached read less than 20%, got 8.33%. Skipping ladvise willread check.
fail_loc=0