1. 08 6月, 2012 1 次提交
  2. 09 5月, 2012 1 次提交
  3. 17 3月, 2012 1 次提交
  4. 13 3月, 2012 2 次提交
    • P
      perf/x86: Prettify pmu config literals · f9b4eeb8
      Peter Zijlstra 提交于
      I got somewhat tired of having to decode hex numbers..
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: NThomas Gleixner <tglx@linutronix.de>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Robert Richter <robert.richter@amd.com>
      Link: http://lkml.kernel.org/n/tip-0vsy1sgywc4uar3mu1szm0rg@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
      f9b4eeb8
    • P
      perf/x86: Fix local vs remote memory events for NHM/WSM · 87e24f4b
      Peter Zijlstra 提交于
      Verified using the below proglet.. before:
      
      [root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 0
      remote write
      
       Performance counter stats for './numa 0':
      
               2,101,554 node-stores
               2,096,931 node-store-misses
      
             5.021546079 seconds time elapsed
      
      [root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 1
      local write
      
       Performance counter stats for './numa 1':
      
                 501,137 node-stores
                     199 node-store-misses
      
             5.124451068 seconds time elapsed
      
      After:
      
      [root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 0
      remote write
      
       Performance counter stats for './numa 0':
      
               2,107,516 node-stores
               2,097,187 node-store-misses
      
             5.012755149 seconds time elapsed
      
      [root@westmere ~]# perf stat -e node-stores -e node-store-misses ./numa 1
      local write
      
       Performance counter stats for './numa 1':
      
               2,063,355 node-stores
                     165 node-store-misses
      
             5.082091494 seconds time elapsed
      
      #define _GNU_SOURCE
      
      #include <sched.h>
      #include <stdio.h>
      #include <errno.h>
      #include <sys/mman.h>
      #include <sys/types.h>
      #include <dirent.h>
      #include <signal.h>
      #include <unistd.h>
      #include <numaif.h>
      #include <stdlib.h>
      
      #define SIZE (32*1024*1024)
      
      volatile int done;
      
      void sig_done(int sig)
      {
      	done = 1;
      }
      
      int main(int argc, char **argv)
      {
      	cpu_set_t *mask, *mask2;
      	size_t size;
      	int i, err, t;
      	int nrcpus = 1024;
      	char *mem;
      	unsigned long nodemask = 0x01; /* node 0 */
      	DIR *node;
      	struct dirent *de;
      	int read = 0;
      	int local = 0;
      
      	if (argc < 2) {
      		printf("usage: %s [0-3]\n", argv[0]);
      		printf("  bit0 - local/remote\n");
      		printf("  bit1 - read/write\n");
      		exit(0);
      	}
      
      	switch (atoi(argv[1])) {
      	case 0:
      		printf("remote write\n");
      		break;
      	case 1:
      		printf("local write\n");
      		local = 1;
      		break;
      	case 2:
      		printf("remote read\n");
      		read = 1;
      		break;
      	case 3:
      		printf("local read\n");
      		local = 1;
      		read = 1;
      		break;
      	}
      
      	mask = CPU_ALLOC(nrcpus);
      	size = CPU_ALLOC_SIZE(nrcpus);
      	CPU_ZERO_S(size, mask);
      
      	node = opendir("/sys/devices/system/node/node0/");
      	if (!node)
      		perror("opendir");
      	while ((de = readdir(node))) {
      		int cpu;
      
      		if (sscanf(de->d_name, "cpu%d", &cpu) == 1)
      			CPU_SET_S(cpu, size, mask);
      	}
      	closedir(node);
      
      	mask2 = CPU_ALLOC(nrcpus);
      	CPU_ZERO_S(size, mask2);
      	for (i = 0; i < size; i++)
      		CPU_SET_S(i, size, mask2);
      	CPU_XOR_S(size, mask2, mask2, mask); // invert
      
      	if (!local)
      		mask = mask2;
      
      	err = sched_setaffinity(0, size, mask);
      	if (err)
      		perror("sched_setaffinity");
      
      	mem = mmap(0, SIZE, PROT_READ|PROT_WRITE,
      			MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
      	err = mbind(mem, SIZE, MPOL_BIND, &nodemask, 8*sizeof(nodemask), MPOL_MF_MOVE);
      	if (err)
      		perror("mbind");
      
      	signal(SIGALRM, sig_done);
      	alarm(5);
      
      	if (!read) {
      		while (!done) {
      			for (i = 0; i < SIZE; i++)
      				mem[i] = 0x01;
      		}
      	} else {
      		while (!done) {
      			for (i = 0; i < SIZE; i++)
      				t += *(volatile char *)(mem + i);
      		}
      	}
      
      	return 0;
      }
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: <stable@kernel.org>
      Link: http://lkml.kernel.org/n/tip-tq73sxus35xmqpojf7ootxgs@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
      87e24f4b
  5. 05 3月, 2012 4 次提交
  6. 24 12月, 2011 1 次提交
  7. 21 12月, 2011 2 次提交
  8. 07 12月, 2011 2 次提交
  9. 05 12月, 2011 1 次提交
  10. 01 11月, 2011 1 次提交
    • P
      x86: Fix files explicitly requiring export.h for EXPORT_SYMBOL/THIS_MODULE · 69c60c88
      Paul Gortmaker 提交于
      These files were implicitly getting EXPORT_SYMBOL via device.h
      which was including module.h, but that will be fixed up shortly.
      
      By fixing these now, we can avoid seeing things like:
      
      arch/x86/kernel/rtc.c:29: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’
      arch/x86/kernel/pci-dma.c:20: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’
      arch/x86/kernel/e820.c:69: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL_GPL’
      
      [ with input from Randy Dunlap <rdunlap@xenotime.net> and also
        from Stephen Rothwell <sfr@canb.auug.org.au> ]
      Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
      69c60c88
  11. 10 10月, 2011 1 次提交
  12. 26 9月, 2011 1 次提交
  13. 14 8月, 2011 1 次提交
  14. 09 8月, 2011 1 次提交
  15. 01 7月, 2011 7 次提交
  16. 06 5月, 2011 2 次提交
  17. 29 4月, 2011 3 次提交
  18. 28 4月, 2011 1 次提交
  19. 27 4月, 2011 4 次提交
  20. 26 4月, 2011 1 次提交
  21. 22 4月, 2011 2 次提交
    • P
      perf, x86: Update/fix Intel Nehalem cache events · f4929bd3
      Peter Zijlstra 提交于
      Change the Nehalem cache events to use retired memory instruction counters
      (similar to Westmere), this greatly improves the provided stats.
      
      Using:
      
      main ()
      {
              int i;
      
              for (i = 0; i < 1000000000; i++) {
                      asm("mov (%%rsp), %%rbx;"
                          "mov %%rbx, (%%rsp);" : : : "rbx");
              }
      }
      
      We find:
      
       $ perf stat --repeat 10 -e instructions:u -e l1-dcache-loads:u -e l1-dcache-stores:u ./loop_1b_loads+stores
        Performance counter stats for './loop_1b_loads+stores' (10 runs):
            4,000,081,056 instructions:u           #      0.000 IPC ( +-   0.000% )
            4,999,502,846 l1-dcache-loads:u          ( +-   0.008% )
            1,000,034,832 l1-dcache-stores:u         ( +-   0.000% )
               1.565184942  seconds time elapsed   ( +-   0.005% )
      
      The 5b is surprising - we'd expect 1b:
      
       $ perf stat --repeat 10 -e instructions:u -e r10b:u -e l1-dcache-stores:u ./loop_1b_loads+stores
        Performance counter stats for './loop_1b_loads+stores' (10 runs):
            4,000,081,054 instructions:u           #      0.000 IPC ( +-   0.000% )
            1,000,021,961 r10b:u                     ( +-   0.000% )
            1,000,030,951 l1-dcache-stores:u         ( +-   0.000% )
               1.565055422  seconds time elapsed   ( +-   0.003% )
      
      Which this patch thus fixes.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Cyrill Gorcunov <gorcunov@openvz.org>
      Link: http://lkml.kernel.org/n/tip-q9rtru7b7840tws75xzboapv@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
      f4929bd3
    • A
      perf: Support Xeon E7's via the Westmere PMU driver · b2508e82
      Andi Kleen 提交于
      There's a new model number public, 47, for Xeon E7 (aka Westmere EX).
      Signed-off-by: NAndi Kleen <ak@linux.intel.com>
      Cc: a.p.zijlstra@chello.nl
      Link: http://lkml.kernel.org/r/1303429715-10202-1-git-send-email-andi@firstfloor.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
      b2508e82