== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:42:41 (1773236561)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.96651 s, 17.6 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-ffff9e93c3807000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.919186
Iter 1/10: OSS cache speed: 1.82695
Iter 1/10: ladvise speed: 1.95457
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.63119
Iter 2/10: OSS cache speed: 1.92464
Iter 2/10: ladvise speed: 1.84198
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.24919
Iter 3/10: OSS cache speed: 2.62059
Iter 3/10: ladvise speed: 2.68715
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.58283
Iter 4/10: OSS cache speed: 2.55861
Iter 4/10: ladvise speed: 2.72195
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.6323
Iter 5/10: OSS cache speed: 2.84064
Iter 5/10: ladvise speed: 2.92475
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.49287
Iter 6/10: OSS cache speed: 2.84078
Iter 6/10: ladvise speed: 2.58282
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.32757
Iter 7/10: OSS cache speed: 2.44458
Iter 7/10: ladvise speed: 2.45164
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.37132
Iter 8/10: OSS cache speed: 2.66941
Iter 8/10: ladvise speed: 2.51088
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.29843
Iter 9/10: OSS cache speed: 2.87696
Iter 9/10: ladvise speed: 2.76852
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.45173
Iter 10/10: OSS cache speed: 2.45888
Iter 10/10: ladvise speed: 2.41328
Average uncached read: 2.19
Average speedup with OSS cached read:  2.50 = +14%
Average speedup with ladvise willread:  2.48 = +13%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0