== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:34:34 (1723253674)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.89329 s, 36.2 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-ffff8800b58e4000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.66024
Iter 1/10: OSS cache speed: 2.77558
Iter 1/10: ladvise speed: 3.0005
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.0475
Iter 2/10: OSS cache speed: 3.21913
Iter 2/10: ladvise speed: 3.46144
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.87512
Iter 3/10: OSS cache speed: 3.33969
Iter 3/10: ladvise speed: 2.98929
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.8483
Iter 4/10: OSS cache speed: 3.1271
Iter 4/10: ladvise speed: 3.14428
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.83235
Iter 5/10: OSS cache speed: 3.15818
Iter 5/10: ladvise speed: 3.3104
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.72848
Iter 6/10: OSS cache speed: 1.99012
Iter 6/10: ladvise speed: 1.82641
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.04825
Iter 7/10: OSS cache speed: 1.11142
Iter 7/10: ladvise speed: 1.1907
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.04861
Iter 8/10: OSS cache speed: 1.29928
Iter 8/10: ladvise speed: 1.61087
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.08713
Iter 9/10: OSS cache speed: 1.31928
Iter 9/10: ladvise speed: 1.35073
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.3768
Iter 10/10: OSS cache speed: 2.31164
Iter 10/10: ladvise speed: 2.49132
Average uncached read: 2.15
Average speedup with OSS cached read: 2.36 = +9.76%
Average speedup with ladvise willread: 2.43 = +13.02%
Speedup with OSS cached read less than 20%, got 9.76%. Skipping ladvise willread check.
fail_loc=0