== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 07:06:36 (1773227196)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.48526 s, 16.2 MB/s
llite.lustre-ffff9ff605efb000.read_ahead_stats=clear
llite.lustre-ffff9ff605efb000.read_ahead_stats=
snapshot_time             1773227213.043521672 secs.nsecs
start_time                1773227204.189336464 secs.nsecs
elapsed_time              8.854185208 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=225852: Wed Mar 11 07:14:09 2026
  read: IOPS=11, BW=11.8MiB/s (12.4MB/s)(5120MiB/433919msec)
    clat (msec): min=48, max=299, avg=84.58, stdev=36.88
     lat (msec): min=48, max=299, avg=84.58, stdev=36.88
    clat percentiles (msec):
     |  1.00th=[   52],  5.00th=[   58], 10.00th=[   59], 20.00th=[   62],
     | 30.00th=[   64], 40.00th=[   67], 50.00th=[   70], 60.00th=[   73],
     | 70.00th=[   81], 80.00th=[   93], 90.00th=[  150], 95.00th=[  159],
     | 99.00th=[  192], 99.50th=[  251], 99.90th=[  296], 99.95th=[  296],
     | 99.99th=[  300]
   bw (  KiB/s): min= 2048, max=20480, per=100.00%, avg=12112.49, stdev=4261.85, samples=865
   iops        : min=    2, max=   20, avg=11.82, stdev= 4.16, samples=865
  lat (msec)   : 50=0.61%, 100=81.05%, 250=17.83%, 500=0.51%
  cpu          : usr=0.58%, sys=87.71%, ctx=14101, 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=11.8MiB/s (12.4MB/s), 11.8MiB/s-11.8MiB/s (12.4MB/s-12.4MB/s), io=5120MiB (5369MB), run=433919-433919msec