== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:17:36 (1738480656)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.35887 s, 44.5 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-ffff8800b0625000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.7617
Iter 1/10: OSS cache speed: 1.83084
Iter 1/10: ladvise speed: 1.97299
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.57428
Iter 2/10: OSS cache speed: 1.7988
Iter 2/10: ladvise speed: 2.14443
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.81495
Iter 3/10: OSS cache speed: 1.81306
Iter 3/10: ladvise speed: 2.02702
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.73005
Iter 4/10: OSS cache speed: 2.0962
Iter 4/10: ladvise speed: 1.85313
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.723
Iter 5/10: OSS cache speed: 1.98045
Iter 5/10: ladvise speed: 1.81277
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.60734
Iter 6/10: OSS cache speed: 2.0699
Iter 6/10: ladvise speed: 2.15193
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.75943
Iter 7/10: OSS cache speed: 2.06037
Iter 7/10: ladvise speed: 2.60771
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.85814
Iter 8/10: OSS cache speed: 3.31044
Iter 8/10: ladvise speed: 2.46695
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.89686
Iter 9/10: OSS cache speed: 2.05944
Iter 9/10: ladvise speed: 1.75664
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.03595
Iter 10/10: OSS cache speed: 2.22589
Iter 10/10: ladvise speed: 2.19895
Average uncached read: 1.87
Average speedup with OSS cached read:  2.12 = +13%
Average speedup with ladvise willread:  2.09 = +11%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0