== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:06:45 (1712264805)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.20879 s, 47.5 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-ffff8800b5890800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.96982
Iter 1/10: OSS cache speed: 3.0399
Iter 1/10: ladvise speed: 2.46615
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.77447
Iter 2/10: OSS cache speed: 2.21883
Iter 2/10: ladvise speed: 2.57467
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.0099
Iter 3/10: OSS cache speed: 2.62521
Iter 3/10: ladvise speed: 2.38072
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.44824
Iter 4/10: OSS cache speed: 2.90509
Iter 4/10: ladvise speed: 2.62326
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.61853
Iter 5/10: OSS cache speed: 2.70819
Iter 5/10: ladvise speed: 3.64931
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.18986
Iter 6/10: OSS cache speed: 3.28376
Iter 6/10: ladvise speed: 2.25783
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.00341
Iter 7/10: OSS cache speed: 1.93465
Iter 7/10: ladvise speed: 1.83434
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.80512
Iter 8/10: OSS cache speed: 3.39773
Iter 8/10: ladvise speed: 3.53433
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.32745
Iter 9/10: OSS cache speed: 2.34627
Iter 9/10: ladvise speed: 1.90745
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.94572
Iter 10/10: OSS cache speed: 2.49057
Iter 10/10: ladvise speed: 2.67105
Average uncached read: 2.20
Average speedup with OSS cached read: 2.69 = +22.27%
Average speedup with ladvise willread: 2.58 = +17.27%
fail_loc=0