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Differential D17419 Diff 49760 sys/dev/hwpmc/hwpmc_logging.c

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sys/dev/hwpmc/hwpmc_logging.c

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* Logging code for hwpmc(4) * Logging code for hwpmc(4)
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <sys/param.h> #include <sys/param.h>
#include <sys/capsicum.h> #include <sys/capsicum.h>
#include <sys/domainset.h>
#include <sys/file.h> #include <sys/file.h>
#include <sys/kernel.h> #include <sys/kernel.h>
#include <sys/kthread.h> #include <sys/kthread.h>
#include <sys/lock.h> #include <sys/lock.h>
#include <sys/module.h> #include <sys/module.h>
#include <sys/mutex.h> #include <sys/mutex.h>
#include <sys/pmc.h> #include <sys/pmc.h>
#include <sys/pmckern.h> #include <sys/pmckern.h>
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* Initialization. * Initialization.
* *
* Create a pool of log buffers and initialize mutexes. * Create a pool of log buffers and initialize mutexes.
*/ */
void void
pmclog_initialize() pmclog_initialize()
{ {
int domain;
struct pmclog_buffer *plb; struct pmclog_buffer *plb;
int domain, ncpus, total;
if (pmclog_buffer_size <= 0 || pmclog_buffer_size > 16*1024) { if (pmclog_buffer_size <= 0 || pmclog_buffer_size > 16*1024) {
(void) printf("hwpmc: tunable logbuffersize=%d must be " (void) printf("hwpmc: tunable logbuffersize=%d must be "
"greater than zero and less than or equal to 16MB.\n", "greater than zero and less than or equal to 16MB.\n",
pmclog_buffer_size); pmclog_buffer_size);
pmclog_buffer_size = PMC_LOG_BUFFER_SIZE; pmclog_buffer_size = PMC_LOG_BUFFER_SIZE;
} }
if (pmc_nlogbuffers_pcpu <= 0) { if (pmc_nlogbuffers_pcpu <= 0) {
(void) printf("hwpmc: tunable nlogbuffers=%d must be greater " (void) printf("hwpmc: tunable nlogbuffers=%d must be greater "
"than zero.\n", pmc_nlogbuffers_pcpu); "than zero.\n", pmc_nlogbuffers_pcpu);
pmc_nlogbuffers_pcpu = PMC_NLOGBUFFERS_PCPU; pmc_nlogbuffers_pcpu = PMC_NLOGBUFFERS_PCPU;
} }
if (pmc_nlogbuffers_pcpu*pmclog_buffer_size > 32*1024) { if (pmc_nlogbuffers_pcpu*pmclog_buffer_size > 32*1024) {
(void) printf("hwpmc: memory allocated pcpu must be less than 32MB (is %dK).\n", (void) printf("hwpmc: memory allocated pcpu must be less than 32MB (is %dK).\n",
pmc_nlogbuffers_pcpu*pmclog_buffer_size); pmc_nlogbuffers_pcpu*pmclog_buffer_size);
pmc_nlogbuffers_pcpu = PMC_NLOGBUFFERS_PCPU; pmc_nlogbuffers_pcpu = PMC_NLOGBUFFERS_PCPU;
pmclog_buffer_size = PMC_LOG_BUFFER_SIZE; pmclog_buffer_size = PMC_LOG_BUFFER_SIZE;
} }
for (domain = 0; domain < vm_ndomains; domain++) { for (domain = 0; domain < vm_ndomains; domain++) {
int ncpus = pmc_dom_hdrs[domain]->pdbh_ncpus; ncpus = pmc_dom_hdrs[domain]->pdbh_ncpus;
int total = ncpus*pmc_nlogbuffers_pcpu; total = ncpus * pmc_nlogbuffers_pcpu;
plb = malloc_domain(sizeof(struct pmclog_buffer)*total, M_PMC, domain, M_WAITOK|M_ZERO); plb = malloc_domainset(sizeof(struct pmclog_buffer) * total,
M_PMC, DOMAINSET_PREF(domain), M_WAITOK | M_ZERO);
pmc_dom_hdrs[domain]->pdbh_plbs = plb; pmc_dom_hdrs[domain]->pdbh_plbs = plb;
for (int i = 0; i < total; i++, plb++) { for (; total > 0; total--, plb++) {
void *buf; void *buf;
buf = malloc_domain(1024 * pmclog_buffer_size, M_PMC, domain, buf = malloc_domainset(1024 * pmclog_buffer_size, M_PMC,
M_WAITOK|M_ZERO); DOMAINSET_PREF(domain), M_WAITOK | M_ZERO);
PMCLOG_INIT_BUFFER_DESCRIPTOR(plb, buf, domain); PMCLOG_INIT_BUFFER_DESCRIPTOR(plb, buf, domain);
pmc_plb_rele_unlocked(plb); pmc_plb_rele_unlocked(plb);
} }
} }
mtx_init(&pmc_kthread_mtx, "pmc-kthread", "pmc-sleep", MTX_DEF); mtx_init(&pmc_kthread_mtx, "pmc-kthread", "pmc-sleep", MTX_DEF);
} }
/* /*
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