0d37aa34f8
The new --uid command line option will show only the tasks for a given user, using the proc interface to figure out the existing tasks. Kernel work is needed to close races at startup, but this should already be useful in many use cases. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-bdnspm000gw2l984a2t53o8z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*
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* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Refactored from builtin-top.c, see that files for further copyright notes.
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "cpumap.h"
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#include "event.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "parse-events.h"
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#include "symbol.h"
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#include "top.h"
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#include <inttypes.h>
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#define SNPRINTF(buf, size, fmt, args...) \
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({ \
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size_t r = snprintf(buf, size, fmt, ## args); \
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r > size ? size : r; \
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})
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size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
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{
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float samples_per_sec = top->samples / top->delay_secs;
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float ksamples_per_sec = top->kernel_samples / top->delay_secs;
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float esamples_percent = (100.0 * top->exact_samples) / top->samples;
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size_t ret = 0;
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if (!perf_guest) {
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
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" exact: %4.1f%% [", samples_per_sec,
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100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
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samples_per_sec)),
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esamples_percent);
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} else {
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float us_samples_per_sec = top->us_samples / top->delay_secs;
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float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs;
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float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs;
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ret = SNPRINTF(bf, size,
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" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
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" guest kernel:%4.1f%% guest us:%4.1f%%"
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" exact: %4.1f%% [", samples_per_sec,
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100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_kernel_samples_per_sec) /
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samples_per_sec)),
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100.0 - (100.0 * ((samples_per_sec -
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guest_us_samples_per_sec) /
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samples_per_sec)),
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esamples_percent);
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}
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if (top->evlist->nr_entries == 1) {
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struct perf_evsel *first;
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first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
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ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
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(uint64_t)first->attr.sample_period,
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top->freq ? "Hz" : "");
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}
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ret += SNPRINTF(bf + ret, size - ret, "%s", event_name(top->sym_evsel));
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ret += SNPRINTF(bf + ret, size - ret, "], ");
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if (top->target_pid != -1)
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ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %d",
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top->target_pid);
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else if (top->target_tid != -1)
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ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %d",
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top->target_tid);
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else if (top->uid_str != NULL)
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ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
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top->uid_str);
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else
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ret += SNPRINTF(bf + ret, size - ret, " (all");
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if (top->cpu_list)
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ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)",
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top->evlist->cpus->nr > 1 ? "s" : "", top->cpu_list);
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else {
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if (top->target_tid != -1)
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ret += SNPRINTF(bf + ret, size - ret, ")");
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else
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ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)",
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top->evlist->cpus->nr,
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top->evlist->cpus->nr > 1 ? "s" : "");
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}
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return ret;
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}
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void perf_top__reset_sample_counters(struct perf_top *top)
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{
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top->samples = top->us_samples = top->kernel_samples =
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top->exact_samples = top->guest_kernel_samples =
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top->guest_us_samples = 0;
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}
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