== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:19:52 (1777425592)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.84241 s, 15.3 MB/s
llite.lustre-ffff8f151087c000.read_ahead_stats=clear
llite.lustre-ffff8f151087c000.read_ahead_stats=
snapshot_time             1777425609.669326298 secs.nsecs
start_time                1777425601.025797395 secs.nsecs
elapsed_time              8.643528903 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=232010: Tue Apr 28 21:27:36 2026
  read: IOPS=11, BW=11.5MiB/s (12.1MB/s)(5120MiB/443642msec)
    clat (msec): min=43, max=283, avg=86.46, stdev=39.91
     lat (msec): min=43, max=283, avg=86.47, stdev=39.91
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   58], 10.00th=[   62], 20.00th=[   64],
     | 30.00th=[   66], 40.00th=[   68], 50.00th=[   70], 60.00th=[   73],
     | 70.00th=[   78], 80.00th=[   87], 90.00th=[  157], 95.00th=[  167],
     | 99.00th=[  230], 99.50th=[  255], 99.90th=[  271], 99.95th=[  275],
     | 99.99th=[  284]
   bw (  KiB/s): min= 4096, max=20480, per=100.00%, avg=11852.17, stdev=4365.40, samples=884
   iops        : min=    4, max=   20, avg=11.57, stdev= 4.27, samples=884
  lat (msec)   : 50=0.31%, 100=81.13%, 250=17.91%, 500=0.64%
  cpu          : usr=0.61%, sys=88.02%, ctx=13666, majf=5120, minf=1305868
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=11.5MiB/s (12.1MB/s), 11.5MiB/s-11.5MiB/s (12.1MB/s-12.1MB/s), io=5120MiB (5369MB), run=443642-443642msec