== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:12:43 (1781608363)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.95806 s, 15.1 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-ffff916949084000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.72915
Iter 1/10: OSS cache speed: 0.924935
Iter 1/10: ladvise speed: 1.50393
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.95907
Iter 2/10: OSS cache speed: 2.10461
Iter 2/10: ladvise speed: 2.33306
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.70271
Iter 3/10: OSS cache speed: 1.99661
Iter 3/10: ladvise speed: 2.20526
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.21968
Iter 4/10: OSS cache speed: 2.35045
Iter 4/10: ladvise speed: 2.2923
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.19342
Iter 5/10: OSS cache speed: 2.30278
Iter 5/10: ladvise speed: 2.44144
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.29909
Iter 6/10: OSS cache speed: 2.57397
Iter 6/10: ladvise speed: 2.3801
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.30644
Iter 7/10: OSS cache speed: 2.43494
Iter 7/10: ladvise speed: 2.5602
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.19385
Iter 8/10: OSS cache speed: 2.40452
Iter 8/10: ladvise speed: 2.21864
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.18179
Iter 9/10: OSS cache speed: 2.41362
Iter 9/10: ladvise speed: 2.42835
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.24719
Iter 10/10: OSS cache speed: 2.41163
Iter 10/10: ladvise speed: 2.39729
Average uncached read: 2.00
Average speedup with OSS cached read:  2.19 = +9%
Average speedup with ladvise willread:  2.27 = +13%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0