16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
117 lines
3.5 KiB
C
117 lines
3.5 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;
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float ksamples_per_sec;
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float esamples_percent;
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struct record_opts *opts = &top->record_opts;
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struct target *target = &opts->target;
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size_t ret = 0;
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if (top->samples) {
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samples_per_sec = top->samples / top->delay_secs;
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ksamples_per_sec = top->kernel_samples / top->delay_secs;
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esamples_percent = (100.0 * top->exact_samples) / top->samples;
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} else {
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samples_per_sec = ksamples_per_sec = esamples_percent = 0.0;
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}
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if (!perf_guest) {
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float ksamples_percent = 0.0;
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if (samples_per_sec)
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ksamples_percent = (100.0 * ksamples_per_sec) /
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samples_per_sec;
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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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ksamples_percent, 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 = perf_evlist__first(top->evlist);
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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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opts->freq ? "Hz" : "");
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}
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ret += SNPRINTF(bf + ret, size - ret, "%s", perf_evsel__name(top->sym_evsel));
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ret += SNPRINTF(bf + ret, size - ret, "], ");
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if (target->pid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s",
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target->pid);
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else if (target->tid)
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ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s",
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target->tid);
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else if (target->uid_str != NULL)
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ret += SNPRINTF(bf + ret, size - ret, " (uid: %s",
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target->uid_str);
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else
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ret += SNPRINTF(bf + ret, size - ret, " (all");
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if (target->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" : "",
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target->cpu_list);
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else {
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if (target->tid)
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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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